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6009c0
2014 Oct 13
2
[LLVMdev] Unexpected spilling of vector register during lane extraction on some x86_64 targets
...vinsertps $0x10,0x4006c0(,%rax,4),%xmm0,%xmm0
40054e: vinsertps $0x20,0x4006c0(,%rsi,4),%xmm0,%xmm0
400559: vinsertps $0x30,0x4006c0(,%rdx,4),%xmm0,%xmm0
400564: vmulps 0x144(%rip),%xmm0,%xmm0 # 4006b0
<__dso_handle+0x38>
40056c: vmovaps %xmm0,0x20046c(%rip) # 6009e0 <r>
400574: xor %eax,%eax
400576: retq
$ clang++ test.cpp -O3 -fstrict-aliasing -funroll-loops -ffast-math
-march=native -mtune=native -DSPILLING_ENSUES=1 /* spilling */
$ objdump -dC --no-show-raw-insn ./a.out
...
00000000004004f0 <main>:
4004f0: vmovdqa 0x2004c8(%ri...