32 lines
1.3 KiB
LLVM
32 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
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; RUN: opt -S -passes=instcombine < %s | FileCheck %s
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define float @pr80941(float %arg) {
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; CHECK-LABEL: define float @pr80941(
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; CHECK-SAME: float [[ARG:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[COND:%.*]] = tail call i1 @llvm.is.fpclass.f32(float [[ARG]], i32 144)
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; CHECK-NEXT: br i1 [[COND]], label [[IF_THEN:%.*]], label [[IF_EXIT:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: [[FPEXT:%.*]] = fpext float [[ARG]] to double
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; CHECK-NEXT: [[SIGN:%.*]] = call double @llvm.copysign.f64(double 0.000000e+00, double [[FPEXT]])
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; CHECK-NEXT: [[FPTRUNC:%.*]] = fptrunc double [[SIGN]] to float
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; CHECK-NEXT: br label [[IF_EXIT]]
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; CHECK: if.exit:
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; CHECK-NEXT: [[RET:%.*]] = phi float [ [[FPTRUNC]], [[IF_THEN]] ], [ [[ARG]], [[ENTRY:%.*]] ]
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; CHECK-NEXT: ret float [[RET]]
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;
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entry:
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%cond = tail call i1 @llvm.is.fpclass.f32(float %arg, i32 144)
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br i1 %cond, label %if.then, label %if.exit
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if.then:
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%fpext = fpext float %arg to double
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%sign = call double @llvm.copysign.f64(double 0.000000e+00, double %fpext)
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%fptrunc = fptrunc double %sign to float
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br label %if.exit
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if.exit:
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%ret = phi float [ %fptrunc, %if.then ], [ %arg, %entry ]
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ret float %ret
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}
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