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https://github.com/RPCS3/llvm-mirror.git
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c63386d01a
double test(double a, double b, double c, double d) { return a<b ? c : d; }
before:
_test:
ucomisd %xmm0, %xmm1
ja LBB0_2
movaps %xmm3, %xmm2
LBB0_2:
movaps %xmm2, %xmm0
after:
_test:
cmpltsd %xmm1, %xmm0
andpd %xmm0, %xmm2
andnpd %xmm3, %xmm0
orpd %xmm2, %xmm0
Small speedup on Benchmarks/SmallPT
llvm-svn: 187706
127 lines
2.2 KiB
LLVM
127 lines
2.2 KiB
LLVM
; RUN: llc < %s -march=x86-64 | FileCheck %s
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; Convert oeq and une to ole/oge/ule/uge when comparing with infinity
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; and negative infinity, because those are more efficient on x86.
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declare void @f() nounwind
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; CHECK-LABEL: oeq_inff:
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; CHECK: ucomiss
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; CHECK: jb
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define void @oeq_inff(float %x) nounwind {
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%t0 = fcmp oeq float %x, 0x7FF0000000000000
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br i1 %t0, label %true, label %false
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true:
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call void @f() nounwind
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br label %false
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false:
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ret void
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}
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; CHECK-LABEL: oeq_inf:
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; CHECK: ucomisd
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; CHECK: jb
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define void @oeq_inf(double %x) nounwind {
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%t0 = fcmp oeq double %x, 0x7FF0000000000000
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br i1 %t0, label %true, label %false
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true:
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call void @f() nounwind
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br label %false
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false:
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ret void
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}
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; CHECK-LABEL: une_inff:
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; CHECK: ucomiss
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; CHECK: jae
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define void @une_inff(float %x) nounwind {
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%t0 = fcmp une float %x, 0x7FF0000000000000
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br i1 %t0, label %true, label %false
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true:
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call void @f() nounwind
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br label %false
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false:
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ret void
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}
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; CHECK-LABEL: une_inf:
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; CHECK: ucomisd
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; CHECK: jae
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define void @une_inf(double %x) nounwind {
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%t0 = fcmp une double %x, 0x7FF0000000000000
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br i1 %t0, label %true, label %false
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true:
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call void @f() nounwind
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br label %false
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false:
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ret void
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}
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; CHECK-LABEL: oeq_neg_inff:
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; CHECK: ucomiss
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; CHECK: jb
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define void @oeq_neg_inff(float %x) nounwind {
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%t0 = fcmp oeq float %x, 0xFFF0000000000000
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br i1 %t0, label %true, label %false
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true:
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call void @f() nounwind
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br label %false
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false:
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ret void
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}
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; CHECK-LABEL: oeq_neg_inf:
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; CHECK: ucomisd
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; CHECK: jb
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define void @oeq_neg_inf(double %x) nounwind {
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%t0 = fcmp oeq double %x, 0xFFF0000000000000
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br i1 %t0, label %true, label %false
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true:
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call void @f() nounwind
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br label %false
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false:
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ret void
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}
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; CHECK-LABEL: une_neg_inff:
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; CHECK: ucomiss
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; CHECK: jae
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define void @une_neg_inff(float %x) nounwind {
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%t0 = fcmp une float %x, 0xFFF0000000000000
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br i1 %t0, label %true, label %false
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true:
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call void @f() nounwind
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br label %false
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false:
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ret void
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}
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; CHECK-LABEL: une_neg_inf:
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; CHECK: ucomisd
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; CHECK: jae
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define void @une_neg_inf(double %x) nounwind {
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%t0 = fcmp une double %x, 0xFFF0000000000000
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br i1 %t0, label %true, label %false
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true:
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call void @f() nounwind
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br label %false
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false:
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ret void
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}
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