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Besides removing phi cycles that reduce to a single value, also remove dead

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phi cycles.  Adjust a few tests to keep dead instructions from being optimized
away.  This (together with my previous change for phi cycles) fixes Apple
radar 7627077.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96057 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bob Wilson
2010-02-13 00:31:44 +00:00
parent 39125d8ef9
commit bf9b221c00
6 changed files with 114 additions and 25 deletions
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2
test/CodeGen/X86/pre-split8.ll
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@@ -20,7 +20,7 @@ bb: ; preds = %bb9.i, %entry
bb9.i: ; preds = %bb
%2 = fsub double %.rle4, %0 ; <double> [#uses=0]
%3 = tail call double @asin(double 0.000000e+00) nounwind readonly ; <double> [#uses=0]
%3 = tail call double @asin(double %.rle4) nounwind readonly ; <double> [#uses=0]
%4 = fmul double 0.000000e+00, %0 ; <double> [#uses=1]
%5 = tail call double @tan(double 0.000000e+00) nounwind readonly ; <double> [#uses=0]
%6 = fmul double %4, 0.000000e+00 ; <double> [#uses=1]