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callee-saved registers at the end of the lists. Also prefer to avoid using the low registers that are in register subclasses required by certain instructions, so that those registers will more likely be available when needed. This change makes a huge improvement in spilling in some cases. Thanks to Jakob for helping me realize the problem. Most of this patch is fixing the testsuite. There are quite a few places where we're checking for specific registers. I changed those to wildcards in places where that doesn't weaken the tests. The spill-q.ll and thumb2-spill-q.ll tests stopped spilling with this change, so I added a bunch of live values to force spills on those tests. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116055 91177308-0d34-0410-b5e6-96231b3b80d8
34 lines
733 B
LLVM
34 lines
733 B
LLVM
; RUN: llc < %s -march=arm -mattr=+vfp3 | FileCheck %s
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define float @t1(float %x) nounwind readnone optsize {
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entry:
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; CHECK: t1:
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; CHECK: vmov.f32 s1, #4.000000e+00
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%0 = fadd float %x, 4.000000e+00
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ret float %0
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}
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define double @t2(double %x) nounwind readnone optsize {
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entry:
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; CHECK: t2:
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; CHECK: vmov.f64 d{{.*}}, #3.000000e+00
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%0 = fadd double %x, 3.000000e+00
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ret double %0
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}
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define double @t3(double %x) nounwind readnone optsize {
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entry:
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; CHECK: t3:
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; CHECK: vmov.f64 d{{.*}}, #-1.300000e+01
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%0 = fmul double %x, -1.300000e+01
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ret double %0
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}
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define float @t4(float %x) nounwind readnone optsize {
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entry:
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; CHECK: t4:
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; CHECK: vmov.f32 s1, #-2.400000e+01
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%0 = fmul float %x, -2.400000e+01
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ret float %0
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}
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