| ; 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 |
| } |
| |