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41 lines
1.2 KiB
LLVM
41 lines
1.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -basicaa -newgvn -S | FileCheck %s
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define i32 @main(i32** %p, i32 %x, i32 %y) {
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; CHECK-LABEL: @main(
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; CHECK-NEXT: block1:
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: br i1 [[CMP]], label [[BLOCK2:%.*]], label [[BLOCK3:%.*]]
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; CHECK: block2:
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; CHECK-NEXT: [[A:%.*]] = load i32*, i32** [[P:%.*]]
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; CHECK-NEXT: br label [[BLOCK4:%.*]]
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; CHECK: block3:
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; CHECK-NEXT: [[B:%.*]] = load i32*, i32** [[P]]
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; CHECK-NEXT: br label [[BLOCK4]]
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; CHECK: block4:
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; CHECK-NEXT: [[EXISTINGPHI:%.*]] = phi i32* [ [[A]], [[BLOCK2]] ], [ [[B]], [[BLOCK3]] ]
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; CHECK-NEXT: [[C:%.*]] = load i32, i32* [[EXISTINGPHI]]
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; CHECK-NEXT: [[E:%.*]] = add i32 [[C]], [[C]]
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; CHECK-NEXT: ret i32 [[E]]
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;
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block1:
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%cmp = icmp eq i32 %x, %y
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br i1 %cmp , label %block2, label %block3
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block2:
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%a = load i32*, i32** %p
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br label %block4
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block3:
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%b = load i32*, i32** %p
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br label %block4
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block4:
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%existingPHI = phi i32* [ %a, %block2 ], [ %b, %block3 ]
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%DEAD = load i32*, i32** %p
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%c = load i32, i32* %DEAD
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%d = load i32, i32* %existingPHI
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%e = add i32 %c, %d
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ret i32 %e
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}
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