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Author SHA1 Message Date
Nadav Rotem b7bb72e4f3 Remove the "-promote-elements" flag. This flag is now enabled by default. 
llvm-svn: 157925
 2012-06-04 11:27:21 +00:00
Evan Cheng b64e7b778b Fix two-address pass's aggressive instruction commuting heuristics. It's meant 
to catch cases like:
 %reg1024<def> = MOV r1
 %reg1025<def> = MOV r0
 %reg1026<def> = ADD %reg1024, %reg1025
 r0            = MOV %reg1026

By commuting ADD, it let coalescer eliminate all of the copies. However, there
was a bug in the heuristics where it ended up commuting the ADD in:

 %reg1024<def> = MOV r0
 %reg1025<def> = MOV 0
 %reg1026<def> = ADD %reg1024, %reg1025
 r0            = MOV %reg1026

That did no benefit but rather ensure the last MOV would not be coalesced.

rdar://11355268

llvm-svn: 156048
 2012-05-03 01:45:13 +00:00
Nadav Rotem 24c6558865 This test was failing on X86 machines which do not have SSE4. Fixed the test by 
specifying that the target CPU is corei7.

llvm-svn: 133053
 2011-06-15 12:26:53 +00:00
Dan Gohman 92789eafe5 Revert r132991. This test is failing on the 
llvm-gcc-x86_64-linux-selfhost buildbot and others.

llvm-svn: 133000
 2011-06-14 18:03:11 +00:00
Nadav Rotem 0e230bc7bb Add a testcase for #9623 
llvm-svn: 132991
 2011-06-14 13:23:10 +00:00