diff options
Diffstat (limited to 'llvm/test/Transforms/LoopStrengthReduce/lsr-overflow.ll')
| -rw-r--r-- | llvm/test/Transforms/LoopStrengthReduce/lsr-overflow.ll | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/llvm/test/Transforms/LoopStrengthReduce/lsr-overflow.ll b/llvm/test/Transforms/LoopStrengthReduce/lsr-overflow.ll new file mode 100644 index 00000000000..0bfc62e6d77 --- /dev/null +++ b/llvm/test/Transforms/LoopStrengthReduce/lsr-overflow.ll @@ -0,0 +1,39 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py +; RUN: opt -lsr-complexity-limit=50 -loop-reduce -S %s | FileCheck %s + +target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" + +define void @overflow1(i64 %a) { +; CHECK-LABEL: @overflow1( +; CHECK-NEXT: bb: +; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[A:%.*]], -1 +; CHECK-NEXT: [[TMP1:%.*]] = add i64 [[A]], -9223372036854775808 +; CHECK-NEXT: br label [[BB1:%.*]] +; CHECK: bb1: +; CHECK-NEXT: [[LSR_IV1:%.*]] = phi i64 [ [[LSR_IV_NEXT2:%.*]], [[BB1]] ], [ [[TMP1]], [[BB:%.*]] ] +; CHECK-NEXT: [[LSR_IV:%.*]] = phi i64 [ [[LSR_IV_NEXT:%.*]], [[BB1]] ], [ [[TMP0]], [[BB]] ] +; CHECK-NEXT: [[TMP4:%.*]] = icmp ne i64 [[LSR_IV1]], 0 +; CHECK-NEXT: [[TMP5:%.*]] = and i1 [[TMP4]], true +; CHECK-NEXT: [[LSR_IV_NEXT]] = add i64 [[LSR_IV]], 1 +; CHECK-NEXT: [[LSR_IV_NEXT2]] = add i64 [[LSR_IV1]], 1 +; CHECK-NEXT: br i1 [[TMP5]], label [[BB1]], label [[BB7:%.*]] +; CHECK: bb7: +; CHECK-NEXT: [[TMP9:%.*]] = and i64 [[LSR_IV_NEXT]], 1 +; CHECK-NEXT: [[TMP10:%.*]] = icmp eq i64 [[TMP9]], 0 +; CHECK-NEXT: unreachable +; +bb: + br label %bb1 + +bb1: ; preds = %bb1, %bb + %tmp = phi i64 [ %a, %bb ], [ %tmp6, %bb1 ] + %tmp4 = icmp ne i64 %tmp, -9223372036854775808 + %tmp5 = and i1 %tmp4, 1 + %tmp6 = add i64 %tmp, 1 + br i1 %tmp5, label %bb1, label %bb7 + +bb7: ; preds = %bb1 + %tmp9 = and i64 %tmp, 1 + %tmp10 = icmp eq i64 %tmp9, 0 + unreachable +} |
