forked from OSchip/llvm-project
29 lines
1.3 KiB
LLVM
29 lines
1.3 KiB
LLVM
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; RUN: llc < %s -relocation-model=pic -disable-fp-elim -mcpu=cortex-a8 -pre-RA-sched=source | FileCheck %s
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target triple = "thumbv7-apple-ios"
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; <rdar://problem/10032939>
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;
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; The vector %v2 is built like this:
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;
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; %vreg6:ssub_1<def> = VMOVSR %vreg0<kill>, pred:14, pred:%noreg, %vreg6<imp-def>; DPR_VFP2:%vreg6 GPR:%vreg0
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; %vreg6:ssub_0<def> = VLDRS <cp#0>, 0, pred:14, pred:%noreg; mem:LD4[ConstantPool] DPR_VFP2:%vreg6
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;
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; When %vreg6 spills, the VLDRS constant pool load cannot be rematerialized
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; since it implicitly reads the ssub_1 sub-register.
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;
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; CHECK: f1
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; CHECK: vmov s1, r0
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; CHECK: vldr.32 s0, LCPI
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; The vector must be spilled:
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; CHECK: vstr.64 d0,
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; CHECK: asm clobber d0
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; And reloaded after the asm:
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; CHECK: vldr.64 [[D16:d[0-9]+]],
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; CHECK: vstr.64 [[D16]], [r1]
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define void @f1(float %x, <2 x float>* %p) {
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%v1 = insertelement <2 x float> undef, float %x, i32 1
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%v2 = insertelement <2 x float> %v1, float 0x400921FB60000000, i32 0
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%y = call double asm sideeffect "asm clobber $0", "=w,0,~{d1},~{d2},~{d3},~{d4},~{d5},~{d6},~{d7},~{d8},~{d9},~{d10},~{d11},~{d12},~{d13},~{d14},~{d15},~{d16},~{d17},~{d18},~{d19},~{d20},~{d21},~{d22},~{d23},~{d24},~{d25},~{d26},~{d27},~{d28},~{d29},~{d30},~{d31}"(<2 x float> %v2) nounwind
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store <2 x float> %v2, <2 x float>* %p, align 8
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ret void
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}
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