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6748c8f28b
fcmp (fneg x), c, pred -> fcmp x, -c, (swap pred) InstCombine already does this. llvm-svn: 293512
81 lines
2.0 KiB
LLVM
81 lines
2.0 KiB
LLVM
; Test that floating-point instructions that set cc are used to
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; eliminate compares for load complement, load negative and load
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; 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) {
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; CHECK-LABEL: f1:
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; CHECK: ltebr
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; CHECK-NEXT: ber %r14
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%neg = fsub float -0.0, %f
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%cond = fcmp oeq float %neg, 0.0
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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) {
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; CHECK-LABEL: f2:
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; CHECK: ltdbr
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; CHECK-NEXT: ber %r14
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%neg = fsub double -0.0, %f
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%cond = fcmp oeq double %neg, 0.0
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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) {
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; CHECK-LABEL: f3:
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; CHECK: lpebr
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; CHECK-NEXT: ber %r14
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%abs = call float @llvm.fabs.f32(float %f)
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%neg = fsub float -0.0, %abs
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%cond = fcmp oeq float %neg, 0.0
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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) {
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; CHECK-LABEL: f4:
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; CHECK: lpdbr
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; CHECK-NEXT: ber %r14
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%abs = call double @llvm.fabs.f64(double %f)
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%neg = fsub double -0.0, %abs
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%cond = fcmp oeq double %neg, 0.0
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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) {
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; CHECK-LABEL: f5:
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; CHECK: lpebr
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; CHECK-NEXT: ber %r14
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%abs = call float @llvm.fabs.f32(float %f)
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%cond = fcmp oeq float %abs, 0.0
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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) {
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; CHECK-LABEL: f6:
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; CHECK: lpdbr
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; CHECK-NEXT: ber %r14
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%abs = call double @llvm.fabs.f64(double %f)
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%cond = fcmp oeq double %abs, 0.0
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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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