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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26051 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner 2006-02-08 06:43:51 +00:00
parent 9ca96410fc
commit 8d3f490991
1 changed files with 17 additions and 0 deletions
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17
lib/Target/PowerPC/README.txt
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@ -279,6 +279,23 @@ instead of
cmpwi cr0, r7, 0
bne cr0, LBB_compare_4 ; loopexit
FreeBench/mason has a basic block that looks like this:
%tmp.130 = seteq int %p.0__, 5 ; <bool> [#uses=1]
%tmp.134 = seteq int %p.1__, 6 ; <bool> [#uses=1]
%tmp.139 = seteq int %p.2__, 12 ; <bool> [#uses=1]
%tmp.144 = seteq int %p.3__, 13 ; <bool> [#uses=1]
%tmp.149 = seteq int %p.4__, 14 ; <bool> [#uses=1]
%tmp.154 = seteq int %p.5__, 15 ; <bool> [#uses=1]
%bothcond = and bool %tmp.134, %tmp.130 ; <bool> [#uses=1]
%bothcond123 = and bool %bothcond, %tmp.139 ; <bool>
%bothcond124 = and bool %bothcond123, %tmp.144 ; <bool>
%bothcond125 = and bool %bothcond124, %tmp.149 ; <bool>
%bothcond126 = and bool %bothcond125, %tmp.154 ; <bool>
br bool %bothcond126, label %shortcirc_next.5, label %else.0
This is a particularly important case where handling CRs better will help.
===-------------------------------------------------------------------------===
Simple IPO for argument passing, change: