56 lines
2.4 KiB
LLVM
56 lines
2.4 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -mergeicmps -verify-dom-info -mtriple=x86_64-unknown-unknown -S | FileCheck %s
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%S = type { i32, i32 }
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; Check that the transformation is avoided when GEP has a use outside of the
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; parant block of the load instruction.
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define zeroext i32 @opeq1(
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; CHECK-LABEL: @opeq1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[FIRST_I:%.*]] = getelementptr inbounds [[S:%.*]], %S* [[A:%.*]], i64 0, i32 1
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; CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* [[FIRST_I]], align 4
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; CHECK-NEXT: [[FIRST1_I:%.*]] = getelementptr inbounds [[S]], %S* [[B:%.*]], i64 0, i32 1
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; CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* [[FIRST1_I]], align 4
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; CHECK-NEXT: [[CMP_I:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
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; CHECK-NEXT: br i1 [[CMP_I]], label [[LAND_RHS_I:%.*]], label [[OPEQ1_EXIT:%.*]]
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; CHECK: land.rhs.i:
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; CHECK-NEXT: [[SECOND_I:%.*]] = getelementptr inbounds [[S]], %S* [[A]], i64 0, i32 0
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; CHECK-NEXT: [[TMP2:%.*]] = load i32, i32* [[SECOND_I]], align 4
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; CHECK-NEXT: [[SECOND2_I:%.*]] = getelementptr inbounds [[S]], %S* [[B]], i64 0, i32 0
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; CHECK-NEXT: [[TMP3:%.*]] = load i32, i32* [[SECOND2_I]], align 4
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; CHECK-NEXT: [[CMP3_I:%.*]] = icmp eq i32 [[TMP2]], [[TMP3]]
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; CHECK-NEXT: br label [[OPEQ1_EXIT]]
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; CHECK: opeq1.exit:
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; CHECK-NEXT: [[TMP4:%.*]] = phi i1 [ false, [[ENTRY:%.*]] ], [ [[CMP3_I]], [[LAND_RHS_I]] ]
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; CHECK-NEXT: [[TMP5:%.*]] = load i32, i32* [[FIRST_I]], align 4
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; CHECK-NEXT: [[TMP6:%.*]] = select i1 [[TMP4]], i32 [[TMP5]], i32 0
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; CHECK-NEXT: ret i32 [[TMP6]]
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;
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%S* nocapture readonly dereferenceable(16) %a,
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%S* nocapture readonly dereferenceable(16) %b) local_unnamed_addr #0 {
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entry:
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%first.i = getelementptr inbounds %S, %S* %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 %S, %S* %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 %S, %S* %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 %S, %S* %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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%5 = load i32, i32* %first.i, align 4
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%6 = select i1 %4, i32 %5, i32 0
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ret i32 %6
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}
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