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85 lines
4.3 KiB
LLVM
85 lines
4.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -mergeicmps -mtriple=x86_64-unknown-unknown -S | FileCheck %s
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; This is a more involved test: clang generates this weird pattern for
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; tuple<uint8_t, uint8_t, uint8_t, uint8_t>. Right now we skip the entry block
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; (which defines the base pointer for other blocks) and the last one (which
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; does not have the expected structure). Only middle blocks (bytes [1,2]) are
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; merged.
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%"class.std::tuple" = type { %"struct.std::_Tuple_impl" }
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%"struct.std::_Tuple_impl" = type { %"struct.std::_Tuple_impl.0", %"struct.std::_Head_base.6" }
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%"struct.std::_Tuple_impl.0" = type { %"struct.std::_Tuple_impl.1", %"struct.std::_Head_base.5" }
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%"struct.std::_Tuple_impl.1" = type { %"struct.std::_Tuple_impl.2", %"struct.std::_Head_base.4" }
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%"struct.std::_Tuple_impl.2" = type { %"struct.std::_Head_base" }
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%"struct.std::_Head_base" = type { i8 }
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%"struct.std::_Head_base.4" = type { i8 }
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%"struct.std::_Head_base.5" = type { i8 }
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%"struct.std::_Head_base.6" = type { i8 }
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define zeroext i1 @opeq(
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; CHECK-LABEL: @opeq(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[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
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; CHECK-NEXT: [[A_ELEM3_ADDR:%.*]] = getelementptr inbounds i8, i8* [[A_BASE]], i64 3
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; CHECK-NEXT: [[TMP0:%.*]] = load i8, i8* [[A_ELEM3_ADDR]], align 1
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; CHECK-NEXT: [[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
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; CHECK-NEXT: [[B_ELEM3_ADDR:%.*]] = getelementptr inbounds i8, i8* [[B_BASE]], i64 3
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; CHECK-NEXT: [[TMP1:%.*]] = load i8, i8* [[B_ELEM3_ADDR]], align 1
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; CHECK-NEXT: [[CMP_ELEM3:%.*]] = icmp eq i8 [[TMP0]], [[TMP1]]
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; CHECK-NEXT: br i1 [[CMP_ELEM3]], label [[LAND_ELEM0:%.*]], label [[OPEQ_EXIT:%.*]]
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; CHECK: land.elem1:
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; CHECK-NEXT: [[A_ELEM1_ADDR:%.*]] = getelementptr inbounds i8, i8* [[A_BASE]], i64 1
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; CHECK-NEXT: [[B_ELEM1_ADDR:%.*]] = getelementptr inbounds i8, i8* [[B_BASE]], i64 1
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; CHECK-NEXT: [[MEMCMP:%.*]] = call i32 @memcmp(i8* [[A_ELEM1_ADDR]], i8* [[B_ELEM1_ADDR]], i64 2)
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; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i32 [[MEMCMP]], 0
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; CHECK-NEXT: br label [[OPEQ_EXIT]]
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; CHECK: land.elem0:
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; CHECK-NEXT: [[TMP3:%.*]] = load i8, i8* [[A_BASE]], align 1
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; CHECK-NEXT: [[TMP4:%.*]] = load i8, i8* [[B_BASE]], align 1
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; CHECK-NEXT: [[CMP_ELEM0:%.*]] = icmp eq i8 [[TMP3]], [[TMP4]]
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; CHECK-NEXT: br i1 [[CMP_ELEM0]], label [[LAND_ELEM1:%.*]], label [[OPEQ_EXIT]]
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; CHECK: opeq.exit:
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; CHECK-NEXT: [[TMP5:%.*]] = phi i1 [ false, [[ENTRY:%.*]] ], [ [[CMP_ELEM0]], [[LAND_ELEM0]] ], [ [[TMP2]], [[LAND_ELEM1]] ]
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; CHECK-NEXT: ret i1 [[TMP5]]
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;
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%"class.std::tuple"* nocapture readonly dereferenceable(4) %a,
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%"class.std::tuple"* nocapture readonly dereferenceable(4) %b) local_unnamed_addr #1 {
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entry:
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%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
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%a.elem3.addr = getelementptr inbounds i8, i8* %a.base, i64 3
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%0 = load i8, i8* %a.elem3.addr, align 1
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%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
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%b.elem3.addr = getelementptr inbounds i8, i8* %b.base, i64 3
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%1 = load i8, i8* %b.elem3.addr, align 1
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%cmp.elem3 = icmp eq i8 %0, %1
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br i1 %cmp.elem3, label %land.elem2, label %opeq.exit
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land.elem2:
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%a.elem2.addr = getelementptr inbounds i8, i8* %a.base, i64 2
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%2 = load i8, i8* %a.elem2.addr, align 1
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%b.elem2.addr = getelementptr inbounds i8, i8* %b.base, i64 2
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%3 = load i8, i8* %b.elem2.addr, align 1
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%cmp.elem2 = icmp eq i8 %2, %3
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br i1 %cmp.elem2, label %land.elem1, label %opeq.exit
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land.elem1:
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%a.elem1.addr = getelementptr inbounds i8, i8* %a.base, i64 1
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%4 = load i8, i8* %a.elem1.addr, align 1
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%b.elem1.addr = getelementptr inbounds i8, i8* %b.base, i64 1
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%5 = load i8, i8* %b.elem1.addr, align 1
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%cmp.elem1 = icmp eq i8 %4, %5
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br i1 %cmp.elem1, label %land.elem0, label %opeq.exit
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land.elem0:
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%6 = load i8, i8* %a.base, align 1
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%7 = load i8, i8* %b.base, align 1
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%cmp.elem0 = icmp eq i8 %6, %7
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br label %opeq.exit
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opeq.exit:
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%8 = phi i1 [ false, %entry ], [ false, %land.elem2 ], [ false, %land.elem1 ], [ %cmp.elem0, %land.elem0 ]
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ret i1 %8
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}
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