Dan Gohman c17e0cf6c0 Implement "superhero" strength reduction, or full strength ... reduction of address calculations down to basic pointer arithmetic. This is currently off by default, as it needs a few other features before it becomes generally useful. And even when enabled, full strength reduction is only performed when it doesn't increase register pressure, and when several other conditions are true. This also factors out a bunch of exisiting LSR code out of StrengthReduceStridedIVUsers into separate functions, and tidies up IV insertion. This actually decreases register pressure even in non-superhero mode. The change in iv-users-in-other-loops.ll is an example of this; there are two more adds because there are two fewer leas, and there is less spilling. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65108 91177308-0d34-0410-b5e6-96231b3b80d8		2009-02-20 04:17:46 +00:00
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Alpha	Fix Alpha test and support for private linkage.	2009-01-15 21:51:46 +00:00
ARM	A couple of places where reused use operands should be marked kill. This is exposed by recent availability fallthrough changes.	2009-02-17 06:41:03 +00:00
CBackend	Fix PR2907 by digging through constant expressions to find FP constants that	2008-10-22 04:53:16 +00:00
CellSPU	Used "-enable-unsafe-fp-math" to allow this transformation - (a * b -c) = c - a *b.	2009-01-31 06:50:54 +00:00
CPP
Generic	Let's try to have our cake and eat it to: move	2009-01-21 11:37:31 +00:00
IA64	Add the private linkage.	2009-01-15 20:18:42 +00:00
Mips	Add the private linkage.	2009-01-15 20:18:42 +00:00
PowerPC	Private linkage support for PPC / Darwin.	2009-01-25 06:32:01 +00:00
SPARC	Add the private linkage.	2009-01-15 20:18:42 +00:00
X86	Implement "superhero" strength reduction, or full strength	2009-02-20 04:17:46 +00:00
XCore	Add the private linkage.	2009-01-15 20:18:42 +00:00