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Diffstat (limited to 'llvm/test/Transforms/LoopPredication/basic.ll')
| -rw-r--r-- | llvm/test/Transforms/LoopPredication/basic.ll | 1595 |
1 files changed, 1595 insertions, 0 deletions
diff --git a/llvm/test/Transforms/LoopPredication/basic.ll b/llvm/test/Transforms/LoopPredication/basic.ll new file mode 100644 index 00000000000..287c6d20be7 --- /dev/null +++ b/llvm/test/Transforms/LoopPredication/basic.ll @@ -0,0 +1,1595 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py +; RUN: opt -S -loop-predication < %s 2>&1 | FileCheck %s +; RUN: opt -S -passes='require<scalar-evolution>,loop(loop-predication)' < %s 2>&1 | FileCheck %s + +declare void @llvm.experimental.guard(i1, ...) + +define i32 @unsigned_loop_0_to_n_ult_check(i32* %array, i32 %length, i32 %n) { +; CHECK-LABEL: @unsigned_loop_0_to_n_ult_check( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: [[TMP0:%.*]] = icmp ule i32 [[N]], [[LENGTH:%.*]] +; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH]] +; CHECK-NEXT: [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[I_NEXT]] = add nuw i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp ult i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp eq i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %within.bounds = icmp ult i32 %i, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp ult i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @unsigned_loop_0_to_n_ule_latch_ult_check(i32* %array, i32 %length, i32 %n) { +; CHECK-LABEL: @unsigned_loop_0_to_n_ule_latch_ult_check( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: [[TMP0:%.*]] = icmp ult i32 [[N]], [[LENGTH:%.*]] +; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH]] +; CHECK-NEXT: [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[I_NEXT]] = add nuw i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp ule i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp eq i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %within.bounds = icmp ult i32 %i, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp ule i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @unsigned_loop_0_to_n_ugt_check(i32* %array, i32 %length, i32 %n) { +; CHECK-LABEL: @unsigned_loop_0_to_n_ugt_check( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: [[TMP0:%.*]] = icmp ule i32 [[N]], [[LENGTH:%.*]] +; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH]] +; CHECK-NEXT: [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[I_NEXT]] = add nuw i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp ult i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp eq i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %within.bounds = icmp ugt i32 %length, %i + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp ult i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @signed_loop_0_to_n_ult_check(i32* %array, i32 %length, i32 %n) { +; CHECK-LABEL: @signed_loop_0_to_n_ult_check( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: [[TMP0:%.*]] = icmp sle i32 [[N]], [[LENGTH:%.*]] +; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH]] +; CHECK-NEXT: [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[I_NEXT]] = add nuw i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp slt i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp sle i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %within.bounds = icmp ult i32 %i, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp slt i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @signed_loop_0_to_n_ult_check_length_range_known(i32* %array, i32* %length.ptr, i32 %n) { +; CHECK-LABEL: @signed_loop_0_to_n_ult_check_length_range_known( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0 +; CHECK-NEXT: [[LENGTH:%.*]] = load i32, i32* [[LENGTH_PTR:%.*]], !range !0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: [[TMP0:%.*]] = icmp sle i32 [[N]], [[LENGTH]] +; CHECK-NEXT: [[TMP1:%.*]] = and i1 true, [[TMP0]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP1]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[I_NEXT]] = add nuw i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp slt i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp sle i32 %n, 0 + %length = load i32, i32* %length.ptr, !range !{i32 1, i32 2147483648} + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %within.bounds = icmp ult i32 %i, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp slt i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @signed_loop_0_to_n_inverse_latch_predicate(i32* %array, i32 %length, i32 %n) { +; CHECK-LABEL: @signed_loop_0_to_n_inverse_latch_predicate( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: [[TMP0:%.*]] = icmp slt i32 [[N]], [[LENGTH:%.*]] +; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH]] +; CHECK-NEXT: [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[I_NEXT]] = add nuw i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp sgt i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[EXIT_LOOPEXIT:%.*]], label [[LOOP]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp sle i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %within.bounds = icmp ult i32 %i, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp sgt i32 %i.next, %n + br i1 %continue, label %exit, label %loop + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @signed_loop_0_to_n_sle_latch_ult_check(i32* %array, i32 %length, i32 %n) { +; CHECK-LABEL: @signed_loop_0_to_n_sle_latch_ult_check( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: [[TMP0:%.*]] = icmp slt i32 [[N]], [[LENGTH:%.*]] +; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH]] +; CHECK-NEXT: [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[I_NEXT]] = add nuw i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp sle i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp sle i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %within.bounds = icmp ult i32 %i, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp sle i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @signed_loop_0_to_n_preincrement_latch_check(i32* %array, i32 %length, i32 %n) { +; CHECK-LABEL: @signed_loop_0_to_n_preincrement_latch_check( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[LENGTH:%.*]], -1 +; CHECK-NEXT: [[TMP1:%.*]] = icmp sle i32 [[N]], [[TMP0]] +; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i32 0, [[LENGTH]] +; CHECK-NEXT: [[TMP3:%.*]] = and i1 [[TMP2]], [[TMP1]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP3]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[I_NEXT]] = add i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp slt i32 [[I]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp sle i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %within.bounds = icmp ult i32 %i, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add i32 %i, 1 + %continue = icmp slt i32 %i, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @signed_loop_0_to_n_preincrement_latch_check_postincrement_guard_check(i32* %array, i32 %length, i32 %n) { +; CHECK-LABEL: @signed_loop_0_to_n_preincrement_latch_check_postincrement_guard_check( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[LENGTH:%.*]], -2 +; CHECK-NEXT: [[TMP1:%.*]] = icmp sle i32 [[N]], [[TMP0]] +; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i32 1, [[LENGTH]] +; CHECK-NEXT: [[TMP3:%.*]] = and i1 [[TMP2]], [[TMP1]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I_NEXT]] = add i32 [[I]], 1 +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP3]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp slt i32 [[I]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp sle i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + + %i.next = add i32 %i, 1 + %within.bounds = icmp ult i32 %i.next, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %continue = icmp slt i32 %i, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @signed_loop_0_to_n_sle_latch_offset_ult_check(i32* %array, i32 %length, i32 %n) { +; CHECK-LABEL: @signed_loop_0_to_n_sle_latch_offset_ult_check( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[LENGTH:%.*]], -1 +; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[N]], [[TMP0]] +; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i32 1, [[LENGTH]] +; CHECK-NEXT: [[TMP3:%.*]] = and i1 [[TMP2]], [[TMP1]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP3]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[I_NEXT]] = add i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp sle i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp sle i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %i.offset = add i32 %i, 1 + %within.bounds = icmp ult i32 %i.offset, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add i32 %i, 1 + %continue = icmp sle i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @signed_loop_0_to_n_offset_sle_latch_offset_ult_check(i32* %array, i32 %length, i32 %n) { +; CHECK-LABEL: @signed_loop_0_to_n_offset_sle_latch_offset_ult_check( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: [[TMP0:%.*]] = icmp slt i32 [[N]], [[LENGTH:%.*]] +; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 1, [[LENGTH]] +; CHECK-NEXT: [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[I_NEXT]] = add i32 [[I]], 1 +; CHECK-NEXT: [[I_NEXT_OFFSET:%.*]] = add i32 [[I_NEXT]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp sle i32 [[I_NEXT_OFFSET]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp sle i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %i.offset = add i32 %i, 1 + %within.bounds = icmp ult i32 %i.offset, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add i32 %i, 1 + %i.next.offset = add i32 %i.next, 1 + %continue = icmp sle i32 %i.next.offset, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @unsupported_latch_pred_loop_0_to_n(i32* %array, i32 %length, i32 %n) { +; CHECK-LABEL: @unsupported_latch_pred_loop_0_to_n( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[WITHIN_BOUNDS:%.*]] = icmp ult i32 [[I]], [[LENGTH:%.*]] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[WITHIN_BOUNDS]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[I_NEXT]] = add nsw i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp ne i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp sle i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %within.bounds = icmp ult i32 %i, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nsw i32 %i, 1 + %continue = icmp ne i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @signed_loop_0_to_n_unsupported_iv_step(i32* %array, i32 %length, i32 %n) { +; CHECK-LABEL: @signed_loop_0_to_n_unsupported_iv_step( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[WITHIN_BOUNDS:%.*]] = icmp ult i32 [[I]], [[LENGTH:%.*]] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[WITHIN_BOUNDS]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[I_NEXT]] = add nsw i32 [[I]], 2 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp slt i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp sle i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %within.bounds = icmp ult i32 %i, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nsw i32 %i, 2 + %continue = icmp slt i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @signed_loop_0_to_n_equal_iv_range_check(i32* %array, i32 %length, i32 %n) { +; CHECK-LABEL: @signed_loop_0_to_n_equal_iv_range_check( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: [[TMP0:%.*]] = icmp sle i32 [[N]], [[LENGTH:%.*]] +; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH]] +; CHECK-NEXT: [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[J:%.*]] = phi i32 [ [[J_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[J_NEXT]] = add nsw i32 [[J]], 1 +; CHECK-NEXT: [[I_NEXT]] = add nsw i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp slt i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp sle i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %j = phi i32 [ %j.next, %loop ], [ 0, %loop.preheader ] + + %within.bounds = icmp ult i32 %j, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %j.next = add nsw i32 %j, 1 + %i.next = add nsw i32 %i, 1 + %continue = icmp slt i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @signed_loop_start_to_n_offset_iv_range_check(i32* %array, i32 %start.i, +; CHECK-LABEL: @signed_loop_start_to_n_offset_iv_range_check( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[LENGTH:%.*]], [[START_I:%.*]] +; CHECK-NEXT: [[TMP1:%.*]] = sub i32 [[TMP0]], [[START_J:%.*]] +; CHECK-NEXT: [[TMP2:%.*]] = icmp sle i32 [[N]], [[TMP1]] +; CHECK-NEXT: [[TMP3:%.*]] = icmp ult i32 [[START_J]], [[LENGTH]] +; CHECK-NEXT: [[TMP4:%.*]] = and i1 [[TMP3]], [[TMP2]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ [[START_I]], [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[J:%.*]] = phi i32 [ [[J_NEXT:%.*]], [[LOOP]] ], [ [[START_J]], [[LOOP_PREHEADER]] ] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP4]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[J_NEXT]] = add i32 [[J]], 1 +; CHECK-NEXT: [[I_NEXT]] = add i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp slt i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; + i32 %start.j, i32 %length, + i32 %n) { +entry: + %tmp5 = icmp sle i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ %start.i, %loop.preheader ] + %j = phi i32 [ %j.next, %loop ], [ %start.j, %loop.preheader ] + + %within.bounds = icmp ult i32 %j, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %j.next = add i32 %j, 1 + %i.next = add i32 %i, 1 + %continue = icmp slt i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @signed_loop_0_to_n_different_iv_types(i32* %array, i16 %length, i32 %n) { +; CHECK-LABEL: @signed_loop_0_to_n_different_iv_types( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[J:%.*]] = phi i16 [ [[J_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[WITHIN_BOUNDS:%.*]] = icmp ult i16 [[J]], [[LENGTH:%.*]] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[WITHIN_BOUNDS]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[J_NEXT]] = add i16 [[J]], 1 +; CHECK-NEXT: [[I_NEXT]] = add i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp slt i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp sle i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %j = phi i16 [ %j.next, %loop ], [ 0, %loop.preheader ] + + %within.bounds = icmp ult i16 %j, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %j.next = add i16 %j, 1 + %i.next = add i32 %i, 1 + %continue = icmp slt i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @signed_loop_0_to_n_different_iv_strides(i32* %array, i32 %length, i32 %n) { +; CHECK-LABEL: @signed_loop_0_to_n_different_iv_strides( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[J:%.*]] = phi i32 [ [[J_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[WITHIN_BOUNDS:%.*]] = icmp ult i32 [[J]], [[LENGTH:%.*]] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[WITHIN_BOUNDS]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[J_NEXT]] = add nsw i32 [[J]], 2 +; CHECK-NEXT: [[I_NEXT]] = add nsw i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp slt i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp sle i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %j = phi i32 [ %j.next, %loop ], [ 0, %loop.preheader ] + + %within.bounds = icmp ult i32 %j, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %j.next = add nsw i32 %j, 2 + %i.next = add nsw i32 %i, 1 + %continue = icmp slt i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @two_range_checks(i32* %array.1, i32 %length.1, +; CHECK-LABEL: @two_range_checks( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: [[TMP0:%.*]] = icmp ule i32 [[N]], [[LENGTH_2:%.*]] +; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH_2]] +; CHECK-NEXT: [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]] +; CHECK-NEXT: [[TMP3:%.*]] = icmp ule i32 [[N]], [[LENGTH_1:%.*]] +; CHECK-NEXT: [[TMP4:%.*]] = icmp ult i32 0, [[LENGTH_1]] +; CHECK-NEXT: [[TMP5:%.*]] = and i1 [[TMP4]], [[TMP3]] +; CHECK-NEXT: [[TMP6:%.*]] = and i1 [[TMP2]], [[TMP5]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP6]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_1_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY_1:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_1_I:%.*]] = load i32, i32* [[ARRAY_1_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_1:%.*]] = add i32 [[LOOP_ACC]], [[ARRAY_1_I]] +; CHECK-NEXT: [[ARRAY_2_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY_2:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_2_I:%.*]] = load i32, i32* [[ARRAY_2_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC_1]], [[ARRAY_2_I]] +; CHECK-NEXT: [[I_NEXT]] = add nuw i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp ult i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; + i32* %array.2, i32 %length.2, i32 %n) { +entry: + %tmp5 = icmp eq i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %within.bounds.1 = icmp ult i32 %i, %length.1 + %within.bounds.2 = icmp ult i32 %i, %length.2 + %within.bounds = and i1 %within.bounds.1, %within.bounds.2 + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.1.i.ptr = getelementptr inbounds i32, i32* %array.1, i64 %i.i64 + %array.1.i = load i32, i32* %array.1.i.ptr, align 4 + %loop.acc.1 = add i32 %loop.acc, %array.1.i + + %array.2.i.ptr = getelementptr inbounds i32, i32* %array.2, i64 %i.i64 + %array.2.i = load i32, i32* %array.2.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc.1, %array.2.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp ult i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @three_range_checks(i32* %array.1, i32 %length.1, +; CHECK-LABEL: @three_range_checks( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: [[TMP0:%.*]] = icmp ule i32 [[N]], [[LENGTH_3:%.*]] +; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH_3]] +; CHECK-NEXT: [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]] +; CHECK-NEXT: [[TMP3:%.*]] = icmp ule i32 [[N]], [[LENGTH_2:%.*]] +; CHECK-NEXT: [[TMP4:%.*]] = icmp ult i32 0, [[LENGTH_2]] +; CHECK-NEXT: [[TMP5:%.*]] = and i1 [[TMP4]], [[TMP3]] +; CHECK-NEXT: [[TMP6:%.*]] = icmp ule i32 [[N]], [[LENGTH_1:%.*]] +; CHECK-NEXT: [[TMP7:%.*]] = icmp ult i32 0, [[LENGTH_1]] +; CHECK-NEXT: [[TMP8:%.*]] = and i1 [[TMP7]], [[TMP6]] +; CHECK-NEXT: [[TMP9:%.*]] = and i1 [[TMP2]], [[TMP5]] +; CHECK-NEXT: [[TMP10:%.*]] = and i1 [[TMP9]], [[TMP8]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP10]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_1_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY_1:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_1_I:%.*]] = load i32, i32* [[ARRAY_1_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_1:%.*]] = add i32 [[LOOP_ACC]], [[ARRAY_1_I]] +; CHECK-NEXT: [[ARRAY_2_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY_2:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_2_I:%.*]] = load i32, i32* [[ARRAY_2_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_2:%.*]] = add i32 [[LOOP_ACC_1]], [[ARRAY_2_I]] +; CHECK-NEXT: [[ARRAY_3_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY_3:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_3_I:%.*]] = load i32, i32* [[ARRAY_3_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC_2]], [[ARRAY_3_I]] +; CHECK-NEXT: [[I_NEXT]] = add nuw i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp ult i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; + i32* %array.2, i32 %length.2, + i32* %array.3, i32 %length.3, i32 %n) { +entry: + %tmp5 = icmp eq i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %within.bounds.1 = icmp ult i32 %i, %length.1 + %within.bounds.2 = icmp ult i32 %i, %length.2 + %within.bounds.3 = icmp ult i32 %i, %length.3 + %within.bounds.1.and.2 = and i1 %within.bounds.1, %within.bounds.2 + %within.bounds = and i1 %within.bounds.1.and.2, %within.bounds.3 + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.1.i.ptr = getelementptr inbounds i32, i32* %array.1, i64 %i.i64 + %array.1.i = load i32, i32* %array.1.i.ptr, align 4 + %loop.acc.1 = add i32 %loop.acc, %array.1.i + + %array.2.i.ptr = getelementptr inbounds i32, i32* %array.2, i64 %i.i64 + %array.2.i = load i32, i32* %array.2.i.ptr, align 4 + %loop.acc.2 = add i32 %loop.acc.1, %array.2.i + + %array.3.i.ptr = getelementptr inbounds i32, i32* %array.3, i64 %i.i64 + %array.3.i = load i32, i32* %array.3.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc.2, %array.3.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp ult i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @three_guards(i32* %array.1, i32 %length.1, +; CHECK-LABEL: @three_guards( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: [[TMP0:%.*]] = icmp ule i32 [[N]], [[LENGTH_1:%.*]] +; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH_1]] +; CHECK-NEXT: [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]] +; CHECK-NEXT: [[TMP3:%.*]] = icmp ule i32 [[N]], [[LENGTH_2:%.*]] +; CHECK-NEXT: [[TMP4:%.*]] = icmp ult i32 0, [[LENGTH_2]] +; CHECK-NEXT: [[TMP5:%.*]] = and i1 [[TMP4]], [[TMP3]] +; CHECK-NEXT: [[TMP6:%.*]] = icmp ule i32 [[N]], [[LENGTH_3:%.*]] +; CHECK-NEXT: [[TMP7:%.*]] = icmp ult i32 0, [[LENGTH_3]] +; CHECK-NEXT: [[TMP8:%.*]] = and i1 [[TMP7]], [[TMP6]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_1_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY_1:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_1_I:%.*]] = load i32, i32* [[ARRAY_1_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_1:%.*]] = add i32 [[LOOP_ACC]], [[ARRAY_1_I]] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP5]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[ARRAY_2_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY_2:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_2_I:%.*]] = load i32, i32* [[ARRAY_2_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_2:%.*]] = add i32 [[LOOP_ACC_1]], [[ARRAY_2_I]] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP8]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[ARRAY_3_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY_3:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_3_I:%.*]] = load i32, i32* [[ARRAY_3_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC_2]], [[ARRAY_3_I]] +; CHECK-NEXT: [[I_NEXT]] = add nuw i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp ult i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; + i32* %array.2, i32 %length.2, + i32* %array.3, i32 %length.3, i32 %n) { +entry: + %tmp5 = icmp eq i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + + %within.bounds.1 = icmp ult i32 %i, %length.1 + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds.1, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.1.i.ptr = getelementptr inbounds i32, i32* %array.1, i64 %i.i64 + %array.1.i = load i32, i32* %array.1.i.ptr, align 4 + %loop.acc.1 = add i32 %loop.acc, %array.1.i + + %within.bounds.2 = icmp ult i32 %i, %length.2 + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds.2, i32 9) [ "deopt"() ] + + %array.2.i.ptr = getelementptr inbounds i32, i32* %array.2, i64 %i.i64 + %array.2.i = load i32, i32* %array.2.i.ptr, align 4 + %loop.acc.2 = add i32 %loop.acc.1, %array.2.i + + %within.bounds.3 = icmp ult i32 %i, %length.3 + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds.3, i32 9) [ "deopt"() ] + + %array.3.i.ptr = getelementptr inbounds i32, i32* %array.3, i64 %i.i64 + %array.3.i = load i32, i32* %array.3.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc.2, %array.3.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp ult i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @unsigned_loop_0_to_n_unrelated_condition(i32* %array, i32 %length, i32 %n, i32 %x) { +; CHECK-LABEL: @unsigned_loop_0_to_n_unrelated_condition( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: [[TMP0:%.*]] = icmp ule i32 [[N]], [[LENGTH:%.*]] +; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 0, [[LENGTH]] +; CHECK-NEXT: [[TMP2:%.*]] = and i1 [[TMP1]], [[TMP0]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[UNRELATED_COND:%.*]] = icmp ult i32 [[X:%.*]], [[LENGTH]] +; CHECK-NEXT: [[TMP3:%.*]] = and i1 [[UNRELATED_COND]], [[TMP2]] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP3]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[I_NEXT]] = add nuw i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp ult i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp eq i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %within.bounds = icmp ult i32 %i, %length + %unrelated.cond = icmp ult i32 %x, %length + %guard.cond = and i1 %within.bounds, %unrelated.cond + call void (i1, ...) @llvm.experimental.guard(i1 %guard.cond, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp ult i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +; Don't change the guard condition if there were no widened subconditions +define i32 @test_no_widened_conditions(i32* %array, i32 %length, i32 %n, i32 %x1, i32 %x2, i32 %x3) { +; CHECK-LABEL: @test_no_widened_conditions( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[UNRELATED_COND_1:%.*]] = icmp eq i32 [[X1:%.*]], [[I]] +; CHECK-NEXT: [[UNRELATED_COND_2:%.*]] = icmp eq i32 [[X2:%.*]], [[I]] +; CHECK-NEXT: [[UNRELATED_COND_3:%.*]] = icmp eq i32 [[X3:%.*]], [[I]] +; CHECK-NEXT: [[UNRELATED_COND_AND_1:%.*]] = and i1 [[UNRELATED_COND_1]], [[UNRELATED_COND_2]] +; CHECK-NEXT: [[GUARD_COND:%.*]] = and i1 [[UNRELATED_COND_AND_1]], [[UNRELATED_COND_3]] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[GUARD_COND]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[I_NEXT]] = add nuw i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp ult i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp eq i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %unrelated.cond.1 = icmp eq i32 %x1, %i + %unrelated.cond.2 = icmp eq i32 %x2, %i + %unrelated.cond.3 = icmp eq i32 %x3, %i + %unrelated.cond.and.1 = and i1 %unrelated.cond.1, %unrelated.cond.2 + %guard.cond = and i1 %unrelated.cond.and.1, %unrelated.cond.3 + + call void (i1, ...) @llvm.experimental.guard(i1 %guard.cond, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp ult i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @signed_loop_start_to_n_loop_variant_bound(i32* %array, i32 %x, i32 %start, i32 %n) { +; CHECK-LABEL: @signed_loop_start_to_n_loop_variant_bound( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ [[START:%.*]], [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[BOUND:%.*]] = add i32 [[I]], [[X:%.*]] +; CHECK-NEXT: [[WITHIN_BOUNDS:%.*]] = icmp ult i32 [[I]], [[BOUND]] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[WITHIN_BOUNDS]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[I_NEXT]] = add nsw i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp slt i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp sle i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ %start, %loop.preheader ] + %bound = add i32 %i, %x + %within.bounds = icmp ult i32 %i, %bound + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nsw i32 %i, 1 + %continue = icmp slt i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @signed_loop_start_to_n_non_monotonic_predicate(i32* %array, i32 %x, i32 %start, i32 %n) { +; CHECK-LABEL: @signed_loop_start_to_n_non_monotonic_predicate( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp sle i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ [[START:%.*]], [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[GUARD_COND:%.*]] = icmp eq i32 [[I]], [[X:%.*]] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[GUARD_COND]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[I_NEXT]] = add nsw i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp slt i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp sle i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ %start, %loop.preheader ] + %guard.cond = icmp eq i32 %i, %x + call void (i1, ...) @llvm.experimental.guard(i1 %guard.cond, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nsw i32 %i, 1 + %continue = icmp slt i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @unsigned_loop_0_to_n_hoist_length(i32* %array, i16 %length.i16, i32 %n) { +; CHECK-LABEL: @unsigned_loop_0_to_n_hoist_length( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: [[TMP0:%.*]] = zext i16 [[LENGTH_I16:%.*]] to i32 +; CHECK-NEXT: [[TMP1:%.*]] = icmp ule i32 [[N]], [[TMP0]] +; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i32 0, [[TMP0]] +; CHECK-NEXT: [[TMP3:%.*]] = and i1 [[TMP2]], [[TMP1]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP3]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[I_NEXT]] = add nuw i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp ult i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp eq i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %length = zext i16 %length.i16 to i32 + %within.bounds = icmp ult i32 %i, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp ult i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @unsigned_loop_0_to_n_cant_hoist_length(i32* %array, i32 %length, i32 %divider, i32 %n) { +; CHECK-LABEL: @unsigned_loop_0_to_n_cant_hoist_length( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[N:%.*]], 0 +; CHECK-NEXT: br i1 [[TMP5]], label [[EXIT:%.*]], label [[LOOP_PREHEADER:%.*]] +; CHECK: loop.preheader: +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: [[LENGTH_UDIV:%.*]] = udiv i32 [[LENGTH:%.*]], [[DIVIDER:%.*]] +; CHECK-NEXT: [[WITHIN_BOUNDS:%.*]] = icmp ult i32 [[I]], [[LENGTH_UDIV]] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[WITHIN_BOUNDS]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[I_NEXT]] = add nuw i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp ult i32 [[I_NEXT]], [[N]] +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]] +; CHECK: exit.loopexit: +; CHECK-NEXT: [[LOOP_ACC_NEXT_LCSSA:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_ACC_NEXT_LCSSA]], [[EXIT_LOOPEXIT]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +entry: + %tmp5 = icmp eq i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %length.udiv = udiv i32 %length, %divider + %within.bounds = icmp ult i32 %i, %length.udiv + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp ult i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + + +; This is a case where the length information tells us that the guard +; must trigger on some iteration. +define i32 @provably_taken(i32* %array, i32* %length.ptr) { +; CHECK-LABEL: @provably_taken( +; CHECK-NEXT: loop.preheader: +; CHECK-NEXT: [[LENGTH:%.*]] = load i32, i32* [[LENGTH_PTR:%.*]], !range !1 +; CHECK-NEXT: [[TMP0:%.*]] = icmp ult i32 0, [[LENGTH]] +; CHECK-NEXT: [[TMP1:%.*]] = and i1 [[TMP0]], false +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[LOOP_ACC:%.*]] = phi i32 [ [[LOOP_ACC_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER:%.*]] ] +; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_NEXT:%.*]], [[LOOP]] ], [ 0, [[LOOP_PREHEADER]] ] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[TMP1]], i32 9) [ "deopt"() ] +; CHECK-NEXT: [[I_I64:%.*]] = zext i32 [[I]] to i64 +; CHECK-NEXT: [[ARRAY_I_PTR:%.*]] = getelementptr inbounds i32, i32* [[ARRAY:%.*]], i64 [[I_I64]] +; CHECK-NEXT: [[ARRAY_I:%.*]] = load i32, i32* [[ARRAY_I_PTR]], align 4 +; CHECK-NEXT: [[LOOP_ACC_NEXT]] = add i32 [[LOOP_ACC]], [[ARRAY_I]] +; CHECK-NEXT: [[I_NEXT]] = add nuw i32 [[I]], 1 +; CHECK-NEXT: [[CONTINUE:%.*]] = icmp slt i32 [[I_NEXT]], 200 +; CHECK-NEXT: br i1 [[CONTINUE]], label [[LOOP]], label [[EXIT:%.*]] +; CHECK: exit: +; CHECK-NEXT: [[RESULT:%.*]] = phi i32 [ [[LOOP_ACC_NEXT]], [[LOOP]] ] +; CHECK-NEXT: ret i32 [[RESULT]] +; +loop.preheader: + %length = load i32, i32* %length.ptr, !range !{i32 0, i32 50} + br label %loop + +loop: + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %within.bounds = icmp ult i32 %i, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp slt i32 %i.next, 200 + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ %loop.acc.next, %loop ] + ret i32 %result +} |
