// EXTRACT_SUBREG / INSERT_SUBREG should be close to its use to
// facilitate coalescing.
return 0;
- if (SU->NumSuccs == 0)
- // If SU does not have a use, i.e. it doesn't produce a value that would
- // be consumed (e.g. store), then it terminates a chain of computation.
- // Give it a large SethiUllman number so it will be scheduled right
- // before its predecessors that it doesn't lengthen their live ranges.
+ if (SU->NumSuccs == 0 && SU->NumPreds != 0)
+ // If SU does not have a register use, i.e. it doesn't produce a value
+ // that would be consumed (e.g. store), then it terminates a chain of
+ // computation. Give it a large SethiUllman number so it will be
+ // scheduled right before its predecessors that it doesn't lengthen
+ // their live ranges.
return 0xffff;
- if (SU->NumPreds == 0)
- // If SU does not have a def, schedule it close to its uses because it
- // does not lengthen any live ranges.
+ if (SU->NumPreds == 0 && SU->NumSuccs != 0)
+ // If SU does not have a register def, schedule it close to its uses
+ // because it does not lengthen any live ranges.
return 0;
return SethiUllmanNumbers[SU->NodeNum];
}
; RUN: llc -march=x86-64 -mattr=+64bit,+sse3 -print-failed-fuse-candidates |& \
; RUN: grep fail | count 1
-declare void @bar()
-declare <4 x float> @qux()
-declare <2 x double> @pin()
+declare float @test_f(float %f)
+declare double @test_d(double %f)
+declare <4 x float> @test_vf(<4 x float> %f)
+declare <2 x double> @test_vd(<2 x double> %f)
declare float @llvm.sqrt.f32(float)
declare double @llvm.sqrt.f64(double)
declare <2 x double> @llvm.x86.sse3.hsub.pd(<2 x double>, <2 x double>)
define float @foo(float %f) {
- call void @bar()
+ %a = call float @test_f(float %f)
%t = call float @llvm.sqrt.f32(float %f)
ret float %t
}
define double @doo(double %f) {
- call void @bar()
+ %a = call double @test_d(double %f)
%t = call double @llvm.sqrt.f64(double %f)
ret double %t
}
define <4 x float> @a0(<4 x float> %f) {
- call void @bar()
+ %a = call <4 x float> @test_vf(<4 x float> %f)
%t = call <4 x float> @llvm.x86.sse.rsqrt.ps(<4 x float> %f)
ret <4 x float> %t
}
define <4 x float> @a1(<4 x float> %f) {
- call void @bar()
+ %a = call <4 x float> @test_vf(<4 x float> %f)
%t = call <4 x float> @llvm.x86.sse.sqrt.ps(<4 x float> %f)
ret <4 x float> %t
}
define <4 x float> @a2(<4 x float> %f) {
- call void @bar()
+ %a = call <4 x float> @test_vf(<4 x float> %f)
%t = call <4 x float> @llvm.x86.sse.rcp.ps(<4 x float> %f)
ret <4 x float> %t
}
define <4 x float> @b3(<4 x float> %f) {
- %y = call <4 x float> @qux()
+ %y = call <4 x float> @test_vf(<4 x float> %f)
%t = call <4 x float> @llvm.x86.sse.min.ps(<4 x float> %y, <4 x float> %f)
ret <4 x float> %t
}
define <4 x float> @b4(<4 x float> %f) {
- %y = call <4 x float> @qux()
+ %y = call <4 x float> @test_vf(<4 x float> %f)
%t = call <4 x float> @llvm.x86.sse.max.ps(<4 x float> %y, <4 x float> %f)
ret <4 x float> %t
}
define <4 x float> @b5(<4 x float> %f) {
- %y = call <4 x float> @qux()
+ %y = call <4 x float> @test_vf(<4 x float> %f)
%t = call <4 x float> @llvm.x86.sse.cmp.ps(<4 x float> %y, <4 x float> %f, i8 7)
ret <4 x float> %t
}
define <4 x float> @b6(<4 x float> %f) {
- %y = call <4 x float> @qux()
+ %y = call <4 x float> @test_vf(<4 x float> %f)
%t = call <4 x float> @llvm.x86.sse3.addsub.ps(<4 x float> %y, <4 x float> %f)
ret <4 x float> %t
}
define <4 x float> @b7(<4 x float> %f) {
- %y = call <4 x float> @qux()
+ %y = call <4 x float> @test_vf(<4 x float> %f)
%t = call <4 x float> @llvm.x86.sse3.hadd.ps(<4 x float> %y, <4 x float> %f)
ret <4 x float> %t
}
define <4 x float> @b8(<4 x float> %f) {
- %y = call <4 x float> @qux()
+ %y = call <4 x float> @test_vf(<4 x float> %f)
%t = call <4 x float> @llvm.x86.sse3.hsub.ps(<4 x float> %y, <4 x float> %f)
ret <4 x float> %t
}
define <2 x double> @c1(<2 x double> %f) {
- call void @bar()
+ %a = call <2 x double> @test_vd(<2 x double> %f)
%t = call <2 x double> @llvm.x86.sse2.sqrt.pd(<2 x double> %f)
ret <2 x double> %t
}
define <2 x double> @d3(<2 x double> %f) {
- %y = call <2 x double> @pin()
+ %y = call <2 x double> @test_vd(<2 x double> %f)
%t = call <2 x double> @llvm.x86.sse2.min.pd(<2 x double> %y, <2 x double> %f)
ret <2 x double> %t
}
define <2 x double> @d4(<2 x double> %f) {
- %y = call <2 x double> @pin()
+ %y = call <2 x double> @test_vd(<2 x double> %f)
%t = call <2 x double> @llvm.x86.sse2.max.pd(<2 x double> %y, <2 x double> %f)
ret <2 x double> %t
}
define <2 x double> @d5(<2 x double> %f) {
- %y = call <2 x double> @pin()
+ %y = call <2 x double> @test_vd(<2 x double> %f)
%t = call <2 x double> @llvm.x86.sse2.cmp.pd(<2 x double> %y, <2 x double> %f, i8 7)
ret <2 x double> %t
}
define <2 x double> @d6(<2 x double> %f) {
- %y = call <2 x double> @pin()
+ %y = call <2 x double> @test_vd(<2 x double> %f)
%t = call <2 x double> @llvm.x86.sse3.addsub.pd(<2 x double> %y, <2 x double> %f)
ret <2 x double> %t
}
define <2 x double> @d7(<2 x double> %f) {
- %y = call <2 x double> @pin()
+ %y = call <2 x double> @test_vd(<2 x double> %f)
%t = call <2 x double> @llvm.x86.sse3.hadd.pd(<2 x double> %y, <2 x double> %f)
ret <2 x double> %t
}
define <2 x double> @d8(<2 x double> %f) {
- %y = call <2 x double> @pin()
+ %y = call <2 x double> @test_vd(<2 x double> %f)
%t = call <2 x double> @llvm.x86.sse3.hsub.pd(<2 x double> %y, <2 x double> %f)
ret <2 x double> %t
}
; This one should fail to fuse.
define <2 x double> @z0(<2 x double> %f) {
- %y = call <2 x double> @pin()
+ %y = call <2 x double> @test_vd(<2 x double> %f)
%t = call <2 x double> @llvm.x86.sse3.hsub.pd(<2 x double> %f, <2 x double> %y)
ret <2 x double> %t
}