Dan Gohman c2390b14c9 Teach IndVarSimplify to optimize code using the C "int" type for ... loop induction on LP64 targets. When the induction variable is used in addressing, IndVars now is usually able to inserst a 64-bit induction variable and eliminates the sign-extending cast. This is also useful for code using C "short" types for induction variables on targets with 32-bit addressing. Inserting a wider induction variable is easy; the tricky part is determining when trunc(sext(i)) expressions are no-ops. This requires range analysis of the loop trip count. A common case is when the original loop iteration starts at 0 and exits when the induction variable is signed-less-than a fixed value; this case is now handled. This replaces IndVarSimplify's OptimizeCanonicalIVType. It was doing the same optimization, but it was limited to loops with constant trip counts, because it was running after the loop rewrite, and the information about the original induction variable is lost by that point. Rename ScalarEvolution's executesAtLeastOnce to isLoopGuardedByCond, generalize it to be able to test for ICMP_NE conditions, and move it to be a public function so that IndVars can use it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64407 91177308-0d34-0410-b5e6-96231b3b80d8		2009-02-12 22:19:27 +00:00
..
ADCE	Remove the ability for ADCE to remove unreachable blocks in loop nests, because, as Eli pointed out, SimplifyCFG already does this.	2008-07-03 17:21:41 +00:00
ArgumentPromotion	Update the callgraph correctly in ArgumentPromotion.	2008-09-08 11:07:35 +00:00
BlockPlacement	Rationalize the names of passes that print information:	2008-09-23 12:47:39 +00:00
BranchFolding	Don't branch fold inline asm statements.	2007-10-19 21:09:55 +00:00
CodeExtractor	sabre brings to my attention that the 'tr' suffix is also obsolete	2008-05-20 21:00:03 +00:00
CodeGenPrepare	reenable test	2008-11-24 21:27:20 +00:00
CondProp	Ignore dbg intrinsics while propagating conditional expression info. Take 2.	2009-02-05 23:32:52 +00:00
ConstantMerge	sabre brings to my attention that the 'tr' suffix is also obsolete	2008-05-20 21:00:03 +00:00
ConstProp	apply Eli's patch for PR2165 and provide a testcase.	2008-10-16 05:26:51 +00:00
DeadArgElim	Support inreg, zext and sext as return value attributes.	2008-09-29 20:49:50 +00:00
DeadStoreElimination	Reimplement the inner loop of DSE. It now uniformly uses getDependence(),	2008-12-06 00:53:22 +00:00
FunctionAttrs	Remove alloca tracking from nocapture analysis. Not only	2009-01-07 19:39:06 +00:00
GlobalDCE	Delete unused global aliases with internal linkage.	2009-01-05 20:37:33 +00:00
GlobalOpt	rewrite OptimizeAwayTrappingUsesOfLoads to 1) avoid a temporary	2009-01-14 00:12:58 +00:00
GVN	fix two more cases where we could let the NLPDI cache get unsorted.	2009-01-23 07:12:16 +00:00
GVNPRE	sabre brings to my attention that the 'tr' suffix is also obsolete	2008-05-20 21:00:03 +00:00
IndMemRem	Actually run the test in this directory.	2009-01-25 08:05:07 +00:00
IndVarsSimplify	Teach IndVarSimplify to optimize code using the C "int" type for	2009-02-12 22:19:27 +00:00
Inline	Fix a nasty bug (PR3550) where the inline pass could incorrectly mark	2009-02-12 07:06:42 +00:00
InstCombine	Add suppport for ConstantExprs of shufflevectors whose result type is not equal to the	2009-02-12 21:28:33 +00:00
Internalize	Teach the internalize pass to also internalize	2009-01-05 21:24:45 +00:00
IPConstantProp	Modify some ipconstprop tests to also test with invokes.	2008-06-19 09:27:44 +00:00
JumpThreading	Fix PR3353, infinitely jump threading an infinite loop make from switches.	2009-01-19 21:20:34 +00:00
LCSSA	sabre brings to my attention that the 'tr' suffix is also obsolete	2008-05-20 21:00:03 +00:00
LICM	Remove GCSE and LoadVN from the testsuite.	2008-08-16 00:00:54 +00:00
LoopDeletion	don't spew tons of stuff to the output. This testcase is *not* for	2008-12-03 06:41:50 +00:00
LoopIndexSplit	Ignore DbgInfoIntrinsics.	2009-02-06 06:19:06 +00:00
LoopRotate	Fix PR3408 by making a non-obvious assumption very obvious, and	2009-01-26 02:11:30 +00:00
LoopSimplify	sabre brings to my attention that the 'tr' suffix is also obsolete	2008-05-20 21:00:03 +00:00
LoopStrengthReduce	Fix PR 3471, and some cleanups.	2009-02-09 22:14:15 +00:00
LoopUnroll	Add -unroll-allow-partial command line option that enabled the loop unroller to	2008-07-29 13:21:23 +00:00
LoopUnswitch	Actually test something. Use PR3170 test case.	2008-12-08 23:44:46 +00:00
LowerInvoke	sabre brings to my attention that the 'tr' suffix is also obsolete	2008-05-20 21:00:03 +00:00
LowerSetJmp	sabre brings to my attention that the 'tr' suffix is also obsolete	2008-05-20 21:00:03 +00:00
LowerSwitch	sabre brings to my attention that the 'tr' suffix is also obsolete	2008-05-20 21:00:03 +00:00
Mem2Reg	no need to print output	2008-10-27 06:56:35 +00:00
MemCpyOpt	Fix two issues that Eli Friedman pointed out, where would misoptimized code like:	2008-06-01 22:26:26 +00:00
MergeFunc	Fix tests not to emit IR output	2008-11-04 23:02:39 +00:00
PredicateSimplifier	sabre brings to my attention that the 'tr' suffix is also obsolete	2008-05-20 21:00:03 +00:00
PruneEH	Do not inline functions with (dynamic) alloca into	2009-01-08 21:45:23 +00:00
RaiseAllocations	sabre brings to my attention that the 'tr' suffix is also obsolete	2008-05-20 21:00:03 +00:00
Reassociate	Remove GCSE and LoadVN from the testsuite.	2008-08-16 00:00:54 +00:00
ScalarRepl	Enable scalar replacement of AllocaInst whose one of the user is dbg info.	2009-02-10 07:00:59 +00:00
SCCP	Fix PR3325, a miscompilation of invokes by IPSCCP. Patch by Jay Foad!	2009-01-14 21:01:16 +00:00
SimplifyCFG	If llvm.dbg.region.end is disappearing then remove corresponding llvm.dbg.func.start also.	2009-02-11 01:29:06 +00:00
SimplifyLibCalls	Revert r64300 and r64301. These were causing the following errors respectively:	2009-02-11 18:19:24 +00:00
SRETPromotion	Add a basic test for the SRETPromotion pass.	2008-08-07 15:55:18 +00:00
StripSymbols	sabre brings to my attention that the 'tr' suffix is also obsolete	2008-05-20 21:00:03 +00:00
TailCallElim	sabre brings to my attention that the 'tr' suffix is also obsolete	2008-05-20 21:00:03 +00:00
TailDup	Revert 52223.	2008-06-12 20:55:39 +00:00