Commit Graph

2109 Commits

Author SHA1 Message Date
Duncan Sands 56df7dec2b A global variable with external weak linkage can be null, while
an alias could alias such a global variable.

llvm-svn: 42130
2007-09-19 10:10:31 +00:00
Devang Patel 69a55a38ed Relax loop ExitCondition predicate restriction.
llvm-svn: 42122
2007-09-19 00:28:47 +00:00
Devang Patel 455a53b7db Filter loops where split condition's false branch is not empty. For example
for (int i = 0; i < N; ++i) {
  if (i == somevalue)
    dosomething();
   else
    dosomethingelse();
}

llvm-svn: 42121
2007-09-19 00:15:16 +00:00
Devang Patel 4c238c451f Bail out early, before modifying anything.
llvm-svn: 42120
2007-09-19 00:11:01 +00:00
Devang Patel 31f2c8592c Work is incomplete. Loop is not modified at all right now.
llvm-svn: 42119
2007-09-19 00:08:13 +00:00
Devang Patel fcda998ab2 Fix PR1657
llvm-svn: 42075
2007-09-18 01:54:42 +00:00
Devang Patel 267c07b51f Do not eliminate loop when it is invalid to do so. For example,
for(int i = 0; i < N; i++) {
	if ( i == XYZ) {
		A;
	else
		B;
	}
	C;
	D;
}

llvm-svn: 42058
2007-09-17 21:01:05 +00:00
Devang Patel 712dbe9d13 Skeleton for transformations to truncate loop's iteration space.
llvm-svn: 42054
2007-09-17 20:39:48 +00:00
Chris Lattner 0625bd6472 Merge DenseMapKeyInfo & DenseMapValueInfo into DenseMapInfo
Add a new DenseMapInfo::isEqual method to allow clients to redefine
the equality predicate used when probing the hash table.

llvm-svn: 42042
2007-09-17 18:34:04 +00:00
Dan Gohman 2ac2652779 Instcombine x-((x/y)*y) into a remainder operator.
llvm-svn: 42035
2007-09-17 17:31:57 +00:00
Duncan Sands 6d5da71288 Factor the trampoline transformation into a subroutine.
llvm-svn: 42021
2007-09-17 10:26:40 +00:00
Owen Anderson 4cd516b50b Be more careful when constant-folding PHI nodes.
llvm-svn: 41998
2007-09-16 08:04:16 +00:00
Owen Anderson 8d0cb881e5 Remove RLE. It is subsumed by GVN.
llvm-svn: 41968
2007-09-14 22:33:52 +00:00
Dale Johannesen 98d3a08d8f Remove the assumption that FP's are either float or
double from some of the many places in the optimizers
it appears, and do something reasonable with x86
long double.
Make APInt::dump() public, remove newline, use it to
dump ConstantSDNode's.
Allow APFloats in FoldingSet.
Expand X86 backend handling of long doubles (conversions
to/from int, mostly).

llvm-svn: 41967
2007-09-14 22:26:36 +00:00
Chris Lattner d9111b88d1 silence a bogus gcc warning.
llvm-svn: 41949
2007-09-14 03:07:24 +00:00
Bill Wendling 264d4813c7 Temporary reverting r41817
(http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070910/053370.html). It's
causing SPASS to fail.

llvm-svn: 41938
2007-09-14 01:13:55 +00:00
Chris Lattner 7b412cb823 Change llvm.gcroot to not init the root to null at runtime, this prevents
using it for live-in values etc.

llvm-svn: 41879
2007-09-12 17:53:10 +00:00
Duncan Sands 9204663bcb Turn calls to trampolines into calls to the underlying
nested function.

llvm-svn: 41844
2007-09-11 14:35:41 +00:00
Devang Patel 7ed6eb8992 Avoid negative logic.
llvm-svn: 41829
2007-09-11 01:10:45 +00:00
Devang Patel 8c95373ced Refactor code into a separate method.
llvm-svn: 41826
2007-09-11 00:42:56 +00:00
Devang Patel d67479b6ee Clear split info object.
llvm-svn: 41823
2007-09-11 00:23:56 +00:00
Devang Patel a28a7f1b2d Split condition does not have to be ICmpInst in all cases.
llvm-svn: 41822
2007-09-11 00:12:56 +00:00
Devang Patel f4202e91f8 Check all terminators inside loop.
llvm-svn: 41821
2007-09-10 23:57:58 +00:00
Chris Lattner e804567cd8 remove some dead code, this is handled by constant folding.
llvm-svn: 41819
2007-09-10 23:46:29 +00:00
Devang Patel 2181b8e86a Swap exit condition operands if it works.
llvm-svn: 41817
2007-09-10 23:34:06 +00:00
Chris Lattner c75cbe6473 Prevent tailcallelim from breaking "recursive" calls to builtins.
llvm-svn: 41804
2007-09-10 20:58:55 +00:00
Devang Patel f8ab0a9acc Filter exit conditions which are not yet handled.
llvm-svn: 41800
2007-09-10 18:33:42 +00:00
Devang Patel d7409fdce5 Require SCEV before LCSSA.
llvm-svn: 41798
2007-09-10 18:08:23 +00:00
Chris Lattner 85a51e0060 Don't zap back to back volatile load/stores
llvm-svn: 41759
2007-09-07 05:33:03 +00:00
Dale Johannesen bed9dc423c Next round of APFloat changes.
Use APFloat in UpgradeParser and AsmParser.
Change all references to ConstantFP to use the
APFloat interface rather than double.  Remove
the ConstantFP double interfaces.
Use APFloat functions for constant folding arithmetic
and comparisons.
(There are still way too many places APFloat is
just a wrapper around host float/double, but we're
getting there.)

llvm-svn: 41747
2007-09-06 18:13:44 +00:00
Nick Lewycky 0c5c47944a Use isTrueWhenEqual. Thanks Chris!
llvm-svn: 41741
2007-09-06 02:40:25 +00:00
Nick Lewycky b0b066eaaa When the two operands of an icmp are equal, there are five possible predicates
that would make the icmp true. Fixes PR1637.

llvm-svn: 41740
2007-09-06 01:10:22 +00:00
Chuck Rose III 2320323647 Forgot to obey 80 column rule. Fixing that.
llvm-svn: 41725
2007-09-05 20:36:41 +00:00
Chuck Rose III e58572233d Added default parameters to GetElementPtrInstr constructor call. Visual Studio 2k5 was getting confused and was unable to compile it. Suspected compiler error.
llvm-svn: 41721
2007-09-05 16:54:38 +00:00
David Greene c656cbb8c2 Update GEP constructors to use an iterator interface to fix
GLIBCXX_DEBUG issues.

llvm-svn: 41697
2007-09-04 15:46:09 +00:00
Evan Cheng ffac17a223 Fix a gcroot lowering bug.
llvm-svn: 41668
2007-09-01 02:00:51 +00:00
Chris Lattner 0e258b8518 Cut off crazy computation. This helps PR1622 slightly.
llvm-svn: 41522
2007-08-28 04:23:55 +00:00
Devang Patel d2456a171d Use simpler test to filter loops.
llvm-svn: 41516
2007-08-27 21:34:31 +00:00
David Greene 703623d571 Update InvokeInst to work like CallInst
llvm-svn: 41506
2007-08-27 19:04:21 +00:00
Owen Anderson 2b9ec7ff33 Don't DSe volatile stores.
llvm-svn: 41456
2007-08-26 21:14:47 +00:00
Devang Patel 6114751544 Move exit condition and exit branch from exiting block into loop header and dominator info. This avoid execution of dead iteration. Loop is already filter in the beginning such that this change is safe.
llvm-svn: 41394
2007-08-25 02:39:24 +00:00
Devang Patel c1ef32ef3d Constant split values needs upper bound and lower bound check, just like any other split value.
llvm-svn: 41389
2007-08-25 01:09:14 +00:00
Devang Patel 4e63e1f5b5 While calculating upper loop bound for first loop and lower loop bound for second loop, take care of edge cases.
llvm-svn: 41387
2007-08-25 00:56:38 +00:00
Devang Patel f5a01bf025 Fix regression that I caused yesterday night while adding logic to select appropriate split condition branch.
llvm-svn: 41365
2007-08-24 19:32:26 +00:00
Devang Patel 4bc9298f2a It is not safe to execute split condition's true branch first all the time. If split
condition predicate is GT or GE then execute false branch first.

llvm-svn: 41358
2007-08-24 06:17:19 +00:00
Devang Patel 4be56a5d12 Reject ICMP_NE as index split condition.
llvm-svn: 41357
2007-08-24 06:02:25 +00:00
Devang Patel 5e46fac6de Tightenup loop filter.
llvm-svn: 41356
2007-08-24 05:36:56 +00:00
Devang Patel 504dc0aaed Remove incomplete cost analysis.
llvm-svn: 41354
2007-08-24 05:21:13 +00:00
Devang Patel 887db2d832 Remove dead code.
llvm-svn: 41295
2007-08-22 21:07:41 +00:00
Devang Patel 6f4f23320d Fix typo.
llvm-svn: 41292
2007-08-22 20:55:18 +00:00