35 lines
997 B
LLVM
35 lines
997 B
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=instcombine,simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
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; instcombine should sort the PHI operands so that simplifycfg can see the
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; duplicate and remove it.
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define i32 @foo(i1 %t) {
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; CHECK-LABEL: @foo(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br i1 [[T:%.*]], label [[TRUE:%.*]], label [[FALSE:%.*]]
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; CHECK: true:
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[FALSE]]
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; CHECK: false:
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; CHECK-NEXT: [[A:%.*]] = phi i32 [ 4, [[TRUE]] ], [ 10, [[ENTRY:%.*]] ]
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: ret i32 [[A]]
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;
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entry:
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call void @bar()
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br i1 %t, label %true, label %false
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true:
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call void @bar()
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br label %false
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false:
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%a = phi i32 [ 2, %true ], [ 5, %entry ]
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%b = phi i32 [ 5, %entry ], [ 2, %true ]
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call void @bar()
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%c = add i32 %a, %b
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ret i32 %c
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}
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declare void @bar()
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