diff options
Diffstat (limited to 'llvm/test/Transforms/MergeICmps/X86/tuple-four-int8.ll')
| -rw-r--r-- | llvm/test/Transforms/MergeICmps/X86/tuple-four-int8.ll | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/llvm/test/Transforms/MergeICmps/X86/tuple-four-int8.ll b/llvm/test/Transforms/MergeICmps/X86/tuple-four-int8.ll new file mode 100644 index 00000000000..097a1c232fc --- /dev/null +++ b/llvm/test/Transforms/MergeICmps/X86/tuple-four-int8.ll @@ -0,0 +1,81 @@ +; XFAIL: * +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py +; RUN: opt < %s -mergeicmps -mtriple=x86_64-unknown-unknown -S | FileCheck %s + +; This is a more involved test: clang generates this weird pattern for +; tuple<uint8_t, uint8_t, uint8_t, uint8_t>. Right now we skip the entry block +; (which defines the base pointer for other blocks) and the last one (which +; does not have the expected structure). Only middle blocks (bytes [1,2]) are +; merged. + +%"class.std::tuple" = type { %"struct.std::_Tuple_impl" } +%"struct.std::_Tuple_impl" = type { %"struct.std::_Tuple_impl.0", %"struct.std::_Head_base.6" } +%"struct.std::_Tuple_impl.0" = type { %"struct.std::_Tuple_impl.1", %"struct.std::_Head_base.5" } +%"struct.std::_Tuple_impl.1" = type { %"struct.std::_Tuple_impl.2", %"struct.std::_Head_base.4" } +%"struct.std::_Tuple_impl.2" = type { %"struct.std::_Head_base" } +%"struct.std::_Head_base" = type { i8 } +%"struct.std::_Head_base.4" = type { i8 } +%"struct.std::_Head_base.5" = type { i8 } +%"struct.std::_Head_base.6" = type { i8 } + +define zeroext i1 @opeq( +; CHECK-LABEL: @opeq( +; +; These 2 instructions are split. Then we can merge 3 bytes, instead of 2. +; CHECK: br label [[LAND_ELEM0:%.*]] +; CHECK: land.elem1: +; CHECK-NEXT: [[A_ELEM1_ADDR:%.*]] = getelementptr inbounds i8, i8* %a.base, i64 1 +; CHECK-NEXT: [[B_ELEM1_ADDR:%.*]] = getelementptr inbounds i8, i8* %b.base, i64 1 +; CHECK-NEXT: [[MEMCMP:%.*]] = call i32 @memcmp(i8* [[A_ELEM1_ADDR]], i8* [[B_ELEM1_ADDR]], i64 3) +; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i32 [[MEMCMP]], 0 +; CHECK-NEXT: br label [[OPEQ_EXIT:%.*]] +; CHECK: land.elem0: +; CHECK: [[A_BASE:%.*]] = getelementptr inbounds %"class.std::tuple", %"class.std::tuple"* [[A:%.*]], i64 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0 +; CHECK: [[B_BASE:%.*]] = getelementptr inbounds %"class.std::tuple", %"class.std::tuple"* [[B:%.*]], i64 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0 +; CHECK-NEXT: [[TMP3:%.*]] = load i8, i8* [[A_BASE]], align 1 +; CHECK-NEXT: [[TMP4:%.*]] = load i8, i8* [[B_BASE]], align 1 +; CHECK-NEXT: [[CMP_ELEM0:%.*]] = icmp eq i8 [[TMP3]], [[TMP4]] +; CHECK-NEXT: br i1 [[CMP_ELEM0]], label [[LAND_ELEM1:%.*]], label [[OPEQ_EXIT]] +; CHECK: opeq.exit: +; CHECK-NEXT: [[TMP5:%.*]] = phi i1 [ [[CMP_ELEM0]], [[LAND_ELEM0]] ], [ [[TMP2]], [[LAND_ELEM1]] ] +; CHECK-NEXT: ret i1 [[TMP5]] +; + %"class.std::tuple"* nocapture readonly dereferenceable(4) %a, + %"class.std::tuple"* nocapture readonly dereferenceable(4) %b) local_unnamed_addr #1 { +entry: + %a.base = getelementptr inbounds %"class.std::tuple", %"class.std::tuple"* %a, i64 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0 + %a.elem3.addr = getelementptr inbounds i8, i8* %a.base, i64 3 + %0 = load i8, i8* %a.elem3.addr, align 1 + %b.base = getelementptr inbounds %"class.std::tuple", %"class.std::tuple"* %b, i64 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0 + %b.elem3.addr = getelementptr inbounds i8, i8* %b.base, i64 3 + %1 = load i8, i8* %b.elem3.addr, align 1 + %cmp.elem3 = icmp eq i8 %0, %1 + br i1 %cmp.elem3, label %land.elem2, label %opeq.exit + +land.elem2: + %a.elem2.addr = getelementptr inbounds i8, i8* %a.base, i64 2 + %2 = load i8, i8* %a.elem2.addr, align 1 + %b.elem2.addr = getelementptr inbounds i8, i8* %b.base, i64 2 + %3 = load i8, i8* %b.elem2.addr, align 1 + %cmp.elem2 = icmp eq i8 %2, %3 + br i1 %cmp.elem2, label %land.elem1, label %opeq.exit + +land.elem1: + %a.elem1.addr = getelementptr inbounds i8, i8* %a.base, i64 1 + %4 = load i8, i8* %a.elem1.addr, align 1 + %b.elem1.addr = getelementptr inbounds i8, i8* %b.base, i64 1 + %5 = load i8, i8* %b.elem1.addr, align 1 + %cmp.elem1 = icmp eq i8 %4, %5 + br i1 %cmp.elem1, label %land.elem0, label %opeq.exit + +land.elem0: + %6 = load i8, i8* %a.base, align 1 + %7 = load i8, i8* %b.base, align 1 + %cmp.elem0 = icmp eq i8 %6, %7 + br label %opeq.exit + +opeq.exit: + %8 = phi i1 [ false, %entry ], [ false, %land.elem2 ], [ false, %land.elem1 ], [ %cmp.elem0, %land.elem0 ] + ret i1 %8 +} + |
