test/Transforms/InstCombine/pr80941.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
; RUN: opt -S -passes=instcombine < %s | FileCheck %s

define float @pr80941(float %arg) {
; CHECK-LABEL: define float @pr80941(
; CHECK-SAME: float [[ARG:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[COND:%.*]] = tail call i1 @llvm.is.fpclass.f32(float [[ARG]], i32 144)
; CHECK-NEXT:    br i1 [[COND]], label [[IF_THEN:%.*]], label [[IF_EXIT:%.*]]
; CHECK:       if.then:
; CHECK-NEXT:    [[FPEXT:%.*]] = fpext float [[ARG]] to double
; CHECK-NEXT:    [[SIGN:%.*]] = call double @llvm.copysign.f64(double 0.000000e+00, double [[FPEXT]])
; CHECK-NEXT:    [[FPTRUNC:%.*]] = fptrunc double [[SIGN]] to float
; CHECK-NEXT:    br label [[IF_EXIT]]
; CHECK:       if.exit:
; CHECK-NEXT:    [[RET:%.*]] = phi float [ [[FPTRUNC]], [[IF_THEN]] ], [ [[ARG]], [[ENTRY:%.*]] ]
; CHECK-NEXT:    ret float [[RET]]
;
entry:
  %cond = tail call i1 @llvm.is.fpclass.f32(float %arg, i32 144)
  br i1 %cond, label %if.then, label %if.exit

if.then:
  %fpext = fpext float %arg to double
  %sign = call double @llvm.copysign.f64(double 0.000000e+00, double %fpext)
  %fptrunc = fptrunc double %sign to float
  br label %if.exit

if.exit:
  %ret = phi float [ %fptrunc, %if.then ], [ %arg, %entry ]
  ret float %ret
}