fp-strict-cmp-05.ll
3.66 KB
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; Test that floating-point instructions that set cc are *not* used to
; eliminate *strict* compares for load complement, load negative and load
; positive
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s
; Load complement (sign-bit flipped).
; Test f32
define float @f1(float %a, float %b, float %f) #0 {
; CHECK-LABEL: f1:
; CHECK: ltebr
; CHECK-NEXT: ber %r14
%neg = fneg float %f
%cond = call i1 @llvm.experimental.constrained.fcmp.f32(
float %neg, float 0.0,
metadata !"oeq",
metadata !"fpexcept.strict") #0
%res = select i1 %cond, float %a, float %b
ret float %res
}
; Test f64
define double @f2(double %a, double %b, double %f) #0 {
; CHECK-LABEL: f2:
; CHECK: ltdbr
; CHECK-NEXT: ber %r14
%neg = fneg double %f
%cond = call i1 @llvm.experimental.constrained.fcmp.f64(
double %neg, double 0.0,
metadata !"oeq",
metadata !"fpexcept.strict") #0
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Negation of floating-point absolute.
; Test f32
declare float @llvm.fabs.f32(float %f)
define float @f3(float %a, float %b, float %f) #0 {
; CHECK-LABEL: f3:
; CHECK: ltebr
; CHECK-NEXT: ber %r14
%abs = call float @llvm.fabs.f32(float %f) #0
%neg = fneg float %abs
%cond = call i1 @llvm.experimental.constrained.fcmp.f32(
float %neg, float 0.0,
metadata !"oeq",
metadata !"fpexcept.strict") #0
%res = select i1 %cond, float %a, float %b
ret float %res
}
; Test f64
declare double @llvm.fabs.f64(double %f)
define double @f4(double %a, double %b, double %f) #0 {
; CHECK-LABEL: f4:
; CHECK: ltdbr
; CHECK-NEXT: ber %r14
%abs = call double @llvm.fabs.f64(double %f) #0
%neg = fneg double %abs
%cond = call i1 @llvm.experimental.constrained.fcmp.f64(
double %neg, double 0.0,
metadata !"oeq",
metadata !"fpexcept.strict") #0
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Absolute floating-point value.
; Test f32
define float @f5(float %a, float %b, float %f) #0 {
; CHECK-LABEL: f5:
; CHECK: ltebr
; CHECK-NEXT: ber %r14
%abs = call float @llvm.fabs.f32(float %f) #0
%cond = call i1 @llvm.experimental.constrained.fcmp.f32(
float %abs, float 0.0,
metadata !"oeq",
metadata !"fpexcept.strict") #0
%res = select i1 %cond, float %a, float %b
ret float %res
}
; Test f64
define double @f6(double %a, double %b, double %f) #0 {
; CHECK-LABEL: f6:
; CHECK: ltdbr
; CHECK-NEXT: ber %r14
%abs = call double @llvm.fabs.f64(double %f) #0
%cond = call i1 @llvm.experimental.constrained.fcmp.f64(
double %abs, double 0.0,
metadata !"oeq",
metadata !"fpexcept.strict") #0
%res = select i1 %cond, double %a, double %b
ret double %res
}
attributes #0 = { strictfp }
declare i1 @llvm.experimental.constrained.fcmp.f32(float, float, metadata, metadata)
declare i1 @llvm.experimental.constrained.fcmp.f64(double, double, metadata, metadata)