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104 lines
3.7 KiB
LLVM
104 lines
3.7 KiB
LLVM
; Test that floating-point instructions that set cc are *not* used to
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; eliminate *strict* signaling compares for load complement, load negative
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; and load positive
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s
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; Load complement (sign-bit flipped).
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; Test f32
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define float @f1(float %a, float %b, float %f) #0 {
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; CHECK-LABEL: f1:
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; CHECK: kebr
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; CHECK-NEXT: ber %r14
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%neg = fneg float %f
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%cond = call i1 @llvm.experimental.constrained.fcmps.f32(
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float %neg, float 0.0,
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metadata !"oeq",
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metadata !"fpexcept.strict") #0
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%res = select i1 %cond, float %a, float %b
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ret float %res
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}
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; Test f64
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define double @f2(double %a, double %b, double %f) #0 {
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; CHECK-LABEL: f2:
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; CHECK: kdbr
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; CHECK-NEXT: ber %r14
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%neg = fneg double %f
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%cond = call i1 @llvm.experimental.constrained.fcmps.f64(
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double %neg, double 0.0,
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metadata !"oeq",
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metadata !"fpexcept.strict") #0
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Negation of floating-point absolute.
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; Test f32
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declare float @llvm.fabs.f32(float %f)
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define float @f3(float %a, float %b, float %f) #0 {
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; CHECK-LABEL: f3:
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; CHECK: kebr
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; CHECK-NEXT: ber %r14
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%abs = call float @llvm.fabs.f32(float %f) #0
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%neg = fneg float %abs
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%cond = call i1 @llvm.experimental.constrained.fcmps.f32(
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float %neg, float 0.0,
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metadata !"oeq",
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metadata !"fpexcept.strict") #0
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%res = select i1 %cond, float %a, float %b
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ret float %res
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}
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; Test f64
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declare double @llvm.fabs.f64(double %f)
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define double @f4(double %a, double %b, double %f) #0 {
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; CHECK-LABEL: f4:
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; CHECK: kdbr
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; CHECK-NEXT: ber %r14
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%abs = call double @llvm.fabs.f64(double %f) #0
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%neg = fneg double %abs
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%cond = call i1 @llvm.experimental.constrained.fcmps.f64(
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double %neg, double 0.0,
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metadata !"oeq",
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metadata !"fpexcept.strict") #0
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Absolute floating-point value.
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; Test f32
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define float @f5(float %a, float %b, float %f) #0 {
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; CHECK-LABEL: f5:
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; CHECK: kebr
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; CHECK-NEXT: ber %r14
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%abs = call float @llvm.fabs.f32(float %f) #0
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%cond = call i1 @llvm.experimental.constrained.fcmps.f32(
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float %abs, float 0.0,
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metadata !"oeq",
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metadata !"fpexcept.strict") #0
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%res = select i1 %cond, float %a, float %b
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ret float %res
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}
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; Test f64
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define double @f6(double %a, double %b, double %f) #0 {
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; CHECK-LABEL: f6:
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; CHECK: kdbr
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; CHECK-NEXT: ber %r14
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%abs = call double @llvm.fabs.f64(double %f) #0
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%cond = call i1 @llvm.experimental.constrained.fcmps.f64(
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double %abs, double 0.0,
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metadata !"oeq",
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metadata !"fpexcept.strict") #0
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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attributes #0 = { strictfp }
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declare i1 @llvm.experimental.constrained.fcmps.f32(float, float, metadata, metadata)
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declare i1 @llvm.experimental.constrained.fcmps.f64(double, double, metadata, metadata)
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