Benjamin Kramer
77d71ab3d7
SCEVExpander: Don't crash when trying to merge two constant phis.
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Just constant fold them so they can't cause any trouble. Fixes PR12627.
llvm-svn: 166286
2012-10-19 16:37:30 +00:00
Andrew Trick
30b64bcc90
Remove redundant -enable-iv-rewrite=false flags from test cases.
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llvm-svn: 153255
2012-03-22 17:09:04 +00:00
Andrew Trick
8a5a1e603e
Extended replaceCongruentPhis to handle mixed phi types.
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llvm-svn: 147707
2012-01-07 01:12:09 +00:00
Andrew Trick
d36852e6b1
Move replaceCongruentIVs into SCEVExapander and bias toward "expanded"
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IVs.
Indvars previously chose randomly between congruent IVs. Now it will
bias the decision toward IVs that SCEVExpander likes to create. This
was not done to fix any problem, it's just a welcome side effect of
factoring code.
llvm-svn: 141633
2011-10-11 02:28:51 +00:00
Andrew Trick
09cf4287c2
Rename -disable-iv-rewrite to -enable-iv-rewrite=false in preparation for default change.
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llvm-svn: 139517
2011-09-12 18:28:44 +00:00
Andrew Trick
57280c0f11
indvars: Added getInsertPointForUses to find a valid place to truncate the IV.
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llvm-svn: 135568
2011-07-20 05:32:06 +00:00
Andrew Trick
d2b268558b
indvars test case for r135558.
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llvm-svn: 135559
2011-07-20 02:14:37 +00:00
Andrew Trick
ee2d72e5f1
indvars -disable-iv-rewrite fix: derived GEP IVs
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llvm-svn: 135558
2011-07-20 02:08:58 +00:00
Andrew Trick
641b6e4222
indvars -disable-iv-rewrite: Added SimplifyCongruentIVs.
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llvm-svn: 134530
2011-07-06 20:50:43 +00:00
Andrew Trick
ac38d56661
indvars -disable-iv-rewrite: bug fix involving weird geps and related cleanup.
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llvm-svn: 134306
2011-07-02 02:34:25 +00:00
Andrew Trick
bcaaa0ae73
indvars -disable-iv-rewrite: handle cloning binary operators that cannot overflow.
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llvm-svn: 134177
2011-06-30 19:02:17 +00:00
Andrew Trick
b074aa9e26
indvars -disable-iv-rewrite: handle an edge case involving identity phis.
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llvm-svn: 134124
2011-06-30 01:27:23 +00:00
Andrew Trick
a79ebc3dbd
indvars -disable-iv-rewrite: insert new trunc instructions carefully.
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llvm-svn: 134112
2011-06-29 23:03:57 +00:00
Andrew Trick
bc666880ad
indvars -disable-iv-rewrite: just because SCEV ignores casts doesn't
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mean they can be removed.
llvm-svn: 134054
2011-06-29 03:13:40 +00:00
Andrew Trick
0aa40b2f8f
indvars: fixed IV cloning in -disable-iv-rewrite mode with associated
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cleanup and overdue test cases.
llvm-svn: 132038
2011-05-25 04:42:22 +00:00
