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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27790 91177308-0d34-0410-b5e6-96231b3b80d8
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Evan Cheng 2006-04-18 03:45:01 +00:00
parent 72dd9bdcc5
commit 4980467476
1 changed files with 6 additions and 6 deletions
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12
lib/Target/X86/README.txt
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@ -982,17 +982,17 @@ LBB_main_4: # cond_true44
jne LBB_main_4 # cond_true44
There are two problems. 1) No need to two loop induction variables. We can
compare against 262144 * 16. 2) Poor register allocation decisions. We should
compare against 262144 * 16. 2) Known register coalescer issue. We should
be able eliminate one of the movaps:
addps %xmm1, %xmm2
subps %xmm3, %xmm2
addps %xmm2, %xmm1 <=== Commute!
subps %xmm3, %xmm1
movaps (%ecx), %xmm4
movaps %xmm2, %xmm2 <=== Eliminate!
addps %xmm4, %xmm2
movaps %xmm1, %xmm1 <=== Eliminate!
addps %xmm4, %xmm1
addl $16, %ecx
incl %edx
cmpl $262144, %edx
movaps %xmm3, %xmm1
movaps %xmm3, %xmm2
movaps %xmm4, %xmm3
jne LBB_main_4 # cond_true44