Correct comments

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27790 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt
index 39a4407f8be9e1a6200b72ac3cc9169362ca334c..67bc04ff71ad0c8f51fc1c924150c3e69f147f4f 100644 (file)
--- a/lib/Target/X86/README.txt
+++ b/lib/Target/X86/README.txt
@@ -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