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92 lines
4.1 KiB
LLVM
92 lines
4.1 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 --check-prefix=X86
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%"struct.std::pair" = type { i32, i32 }
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define zeroext i1 @opeq1(
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; X86-LABEL: @opeq1(
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; X86-NEXT: entry:
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; X86-NEXT: [[FIRST_I:%.*]] = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* [[A:%.*]], i64 0, i32 0
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; X86-NEXT: [[FIRST1_I:%.*]] = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* [[B:%.*]], i64 0, i32 0
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; X86-NEXT: [[CSTR:%.*]] = bitcast i32* [[FIRST_I]] to i8*
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; X86-NEXT: [[CSTR1:%.*]] = bitcast i32* [[FIRST1_I]] to i8*
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; X86-NEXT: [[MEMCMP:%.*]] = call i32 @memcmp(i8* [[CSTR]], i8* [[CSTR1]], i64 8)
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; X86-NEXT: [[TMP0:%.*]] = icmp eq i32 [[MEMCMP]], 0
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; X86-NEXT: br label [[OPEQ1_EXIT:%.*]]
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; X86: opeq1.exit:
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; X86-NEXT: [[TMP1:%.*]] = phi i1 [ [[TMP0]], [[ENTRY:%.*]] ]
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; X86-NEXT: ret i1 [[TMP1]]
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;
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%"struct.std::pair"* nocapture readonly dereferenceable(8) %a,
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%"struct.std::pair"* nocapture readonly dereferenceable(8) %b) local_unnamed_addr #0 {
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entry:
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%first.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %a, i64 0, i32 0
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%0 = load i32, i32* %first.i, align 4
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%first1.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %b, i64 0, i32 0
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%1 = load i32, i32* %first1.i, align 4
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%cmp.i = icmp eq i32 %0, %1
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br i1 %cmp.i, label %land.rhs.i, label %opeq1.exit
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land.rhs.i:
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%second.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %a, i64 0, i32 1
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%2 = load i32, i32* %second.i, align 4
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%second2.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %b, i64 0, i32 1
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%3 = load i32, i32* %second2.i, align 4
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%cmp3.i = icmp eq i32 %2, %3
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br label %opeq1.exit
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opeq1.exit:
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%4 = phi i1 [ false, %entry ], [ %cmp3.i, %land.rhs.i ]
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ret i1 %4
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; The entry block with zero-offset GEPs is kept, loads are removed.
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; The two 4 byte loads and compares are replaced with a single 8-byte memcmp.
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; The branch is now a direct branch; the other block has been removed.
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; The phi is updated.
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}
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; Same as above, but the two blocks are in inverse order.
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define zeroext i1 @opeq1_inverse(
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; X86-LABEL: @opeq1_inverse(
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; X86-NEXT: land.rhs.i:
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; X86-NEXT: [[SECOND_I:%.*]] = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* [[A:%.*]], i64 0, i32 0
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; X86-NEXT: [[SECOND2_I:%.*]] = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* [[B:%.*]], i64 0, i32 0
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; X86-NEXT: [[CSTR:%.*]] = bitcast i32* [[SECOND_I]] to i8*
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; X86-NEXT: [[CSTR1:%.*]] = bitcast i32* [[SECOND2_I]] to i8*
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; X86-NEXT: [[MEMCMP:%.*]] = call i32 @memcmp(i8* [[CSTR]], i8* [[CSTR1]], i64 8)
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; X86-NEXT: [[TMP0:%.*]] = icmp eq i32 [[MEMCMP]], 0
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; X86-NEXT: br label [[OPEQ1_EXIT:%.*]]
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; X86: opeq1.exit:
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; X86-NEXT: [[TMP1:%.*]] = phi i1 [ [[TMP0]], [[LAND_RHS_I:%.*]] ]
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; X86-NEXT: ret i1 [[TMP1]]
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;
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%"struct.std::pair"* nocapture readonly dereferenceable(8) %a,
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%"struct.std::pair"* nocapture readonly dereferenceable(8) %b) local_unnamed_addr #0 {
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entry:
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%first.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %a, i64 0, i32 1
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%0 = load i32, i32* %first.i, align 4
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%first1.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %b, i64 0, i32 1
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%1 = load i32, i32* %first1.i, align 4
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%cmp.i = icmp eq i32 %0, %1
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br i1 %cmp.i, label %land.rhs.i, label %opeq1.exit
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land.rhs.i:
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%second.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %a, i64 0, i32 0
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%2 = load i32, i32* %second.i, align 4
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%second2.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %b, i64 0, i32 0
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%3 = load i32, i32* %second2.i, align 4
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%cmp3.i = icmp eq i32 %2, %3
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br label %opeq1.exit
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opeq1.exit:
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%4 = phi i1 [ false, %entry ], [ %cmp3.i, %land.rhs.i ]
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ret i1 %4
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; The second block with zero-offset GEPs is kept, loads are removed.
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; CHECK: land.rhs.i
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; The two 4 byte loads and compares are replaced with a single 8-byte memcmp.
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; The branch is now a direct branch; the other block has been removed.
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; The phi is updated.
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}
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