llvm-6502/lib/Transforms
Chris Lattner 7b4ad94282 Fix a problem that Dan Berlin noticed, where reassociation would not succeed
in building maximal expressions before simplifying them.  In particular, i
cases like this:

X-(A+B+X)

the code would consider A+B+X to be a maximal expression (not understanding
that the single use '-' would be turned into a + later), simplify it (a noop)
then later get simplified again.

Each of these simplify steps is where the cost of reassociation comes from,
so this patch should speed up the already fast pass a bit.

Thanks to Dan for noticing this!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23214 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02 07:07:58 +00:00
..
Hello Remove trailing whitespace 2005-04-21 23:48:37 +00:00
Instrumentation Eliminate tabs and trailing spaces 2005-04-23 21:38:35 +00:00
IPO Transform floor((double)FLT) -> (double)floorf(FLT), implementing 2005-08-24 17:22:17 +00:00
Scalar Fix a problem that Dan Berlin noticed, where reassociation would not succeed 2005-09-02 07:07:58 +00:00
Utils Teach SplitCriticalEdge to update LoopInfo if it is alive. This fixes 2005-08-13 01:38:43 +00:00
ExprTypeConvert.cpp ConvertibleToGEP always returns 0, remove some old crufty code which 2005-07-26 16:38:28 +00:00
LevelRaise.cpp ConvertibleToGEP always returns 0, remove some old crufty code which 2005-07-26 16:38:28 +00:00
Makefile Change Library Names Not To Conflict With Others When Installed 2004-10-27 23:18:45 +00:00
TransformInternals.cpp ConvertibleToGEP always returns 0, remove some old crufty code which 2005-07-26 16:38:28 +00:00
TransformInternals.h ConvertibleToGEP always returns 0, remove some old crufty code which 2005-07-26 16:38:28 +00:00