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34 lines
827 B
LLVM
34 lines
827 B
LLVM
; This is a basic sanity check for constant propagation. The fneg instruction
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; should be eliminated.
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; RUN: opt < %s -sccp -S | FileCheck %s
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define double @test(i1 %B) {
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br i1 %B, label %BB1, label %BB2
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BB1:
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%Val = fneg double 42.0
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br label %BB3
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BB2:
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br label %BB3
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BB3:
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%Ret = phi double [%Val, %BB1], [1.0, %BB2]
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ret double %Ret
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; CHECK-LABEL: @test(
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; CHECK: [[PHI:%.*]] = phi double [ -4.200000e+01, %BB1 ], [ 1.000000e+00, %BB2 ]
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}
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define double @test1(i1 %B) {
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br i1 %B, label %BB1, label %BB2
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BB1:
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%Div = fdiv double 1.0, 1.0
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%Val = fneg double %Div
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br label %BB3
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BB2:
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br label %BB3
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BB3:
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%Ret = phi double [%Val, %BB1], [1.0, %BB2]
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ret double %Ret
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; CHECK-LABEL: @test1(
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; CHECK: [[PHI:%.*]] = phi double [ -1.000000e+00, %BB1 ], [ 1.000000e+00, %BB2 ]
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}
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