Chad Rosier
503ec9826c
Revert "[Reassociate] As the expression tree is rewritten make sure the operands are"
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This reverts commit r222142. This is causing/exposing an execution-time regression
in spec2006/gcc and coremark on AArch64/A57/Ofast.
Conflicts:
test/Transforms/Reassociate/optional-flags.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222398 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-19 23:21:20 +00:00
Chad Rosier
14915fe523
[Reassociate] As the expression tree is rewritten make sure the operands are
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emitted in canonical form.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222142 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-17 16:33:50 +00:00
Chad Rosier
ae3738f4a7
[Reassociate] Canonicalize constants to RHS operand.
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Fix a thinko where the RHS was already a constant.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222139 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-17 15:52:51 +00:00
Chad Rosier
7e61b1fb62
[Reassociate] Canonicalize constants to RHS operand.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222005 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-14 17:05:59 +00:00
Chad Rosier
7ad8db4cbb
[Reassociate] Canonicalize negative constants out of expressions.
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Add support for FDiv, which was regressed by the previous commit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221738 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-11 23:36:42 +00:00
Chad Rosier
2244d9a5d2
[Reassociate] Canonicalize negative constants out of expressions.
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This is a reapplication of r221171, but we only perform the transformation
on expressions which include a multiplication. We do not transform rem/div
operations as this doesn't appear to be safe in all cases.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221721 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-11 22:58:35 +00:00
Reid Kleckner
11e6e005b7
Revert "[Reassociate] Canonicalize negative constants out of expressions."
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This reverts commit r221171.
It performs this invalid transformation:
- %div.i = urem i64 -1, %add
- %sub.i = sub i64 -2, %div.i
+ %div.i = urem i64 1, %add
+ %sub.i1 = add i64 %div.i, -2
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221317 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-04 23:42:45 +00:00
Chad Rosier
3f4e9cb609
[Reassociate] Canonicalize negative constants out of expressions.
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This gives CSE/GVN more options to eliminate duplicate expressions.
This is a follow up patch to http://reviews.llvm.org/D4904 .
http://reviews.llvm.org/D5363
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221171 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-03 19:11:30 +00:00
