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22 Commits

Author SHA1 Message Date
Bill Wendling
7840023704 Temporarily reverting r55137. This was causing the bootstrap to go into an 
infinite loop.

llvm-svn: 55149
 2008-08-21 22:40:10 +00:00
David Greene
e14ab14892 Fix ComputeMaskedBits to handle phis correctly. We need to take the 
minimum of the known zeros.

llvm-svn: 55137
 2008-08-21 20:45:12 +00:00
Dan Gohman
db5b503d60 Fix a bogus srem rule - a negative value srem'd by a power-of-2 
can have a non-negative result; for example, -16%16 is 0. Also,
clarify the related comments. This fixes PR2670.

llvm-svn: 54767
 2008-08-13 23:12:35 +00:00
Matthijs Kooijman
96d9bcbdf6 Don't use ++idx_begin when I actually mean idx_begin + 1, especially since we 
also use *idx_begin in the same expression, giving unpredictable results.

This fixes this bug: http://lists.cs.uiuc.edu/pipermail/llvmdev/2008-July/015877.html

llvm-svn: 53670
 2008-07-16 10:47:35 +00:00
Evan Cheng
2005804de6 - Re-apply 52748 and friends with fix. GetConstantStringInfo() returns an empty string for ConstantAggregateZero case which surprises selectiondag. 
- Correctly handle memcpy from constant string which is zero-initialized.

llvm-svn: 52891
 2008-06-30 07:31:25 +00:00
Anton Korobeynikov
6f260767ec Revert (52748 and friends): 
Move GetConstantStringInfo to lib/Analysis. Remove
string output routine from Constant. Update all
callers. Change debug intrinsic api slightly to
accomodate move of routine, these now return values
instead of strings.

This unbreaks llvm-gcc bootstrap.

llvm-svn: 52884
 2008-06-29 17:57:03 +00:00
Chris Lattner
090d81df5e Add back the capability to include nul characters in strings with 
GetConstantStringInfo.  This will hopefully restore llvm-gcc to 
happy bootstrap land.

llvm-svn: 52851
 2008-06-28 05:33:32 +00:00
Chris Lattner
98b286ff98 Tighten up checking. 
llvm-svn: 52850
 2008-06-28 04:37:04 +00:00
Chris Lattner
c94b39d65c fix the regressions from Eric's patch by making GetConstantStringInfo 
tolerate a non-nul-terminated string, and handling a direct global 
reference.

llvm-svn: 52813
 2008-06-27 03:36:51 +00:00
Owen Anderson
8c36469880 Reserve the size we'll need in advance. 
llvm-svn: 52763
 2008-06-26 04:47:41 +00:00
Eric Christopher
4f05c48718 Move GetConstantStringInfo to lib/Analysis. Remove 
string output routine from Constant. Update all
callers. Change debug intrinsic api slightly to
accomodate move of routine, these now return values
instead of strings.

llvm-svn: 52748
 2008-06-26 00:31:12 +00:00
Duncan Sands
054b82d555 Fix some warnings reported by gcc-4.3. Hopefully 
this still compiles on windows - I can't test!

llvm-svn: 52488
 2008-06-19 08:47:31 +00:00
Matthijs Kooijman
dd18157e57 Use a SmallVector instead of an array, since auto_ptr doesn't handle arrays 
properly.

llvm-svn: 52390
 2008-06-17 08:24:37 +00:00
Matthijs Kooijman
2ba9a750dd Make BuildSubAggregate use FindInsertedElement again to prevent it from 
inserting extractvalues. In particular, this prevents the insertion of
extractvalues that can't be folded away later. Also add an example of when this
stuff is needed.

llvm-svn: 52328
 2008-06-16 14:13:46 +00:00
Matthijs Kooijman
544c9b2fb0 Make the InsertBefore argument to FindInsertedValue optional, so you can find an inserted value without modifying the code. 
llvm-svn: 52319
 2008-06-16 13:28:31 +00:00
Matthijs Kooijman
238b1e8d69 Pass around Instruction* instead of Instruction& in FindInsertedValue and friends. 
llvm-svn: 52318
 2008-06-16 13:13:08 +00:00
Matthijs Kooijman
dedcf00fcc 80 column fixes. 
llvm-svn: 52316
 2008-06-16 12:57:37 +00:00
Matthijs Kooijman
1dd7d9cdc1 Move FindScalarValue from InstructionCombining.cpp to ValueTracking.cpp. While 
I'm at it, rename it to FindInsertedValue.

The only functional change is that newly created instructions are no longer
added to instcombine's worklist, but that is not really necessary anyway (and
I'll commit some improvements next that will completely remove the need).

llvm-svn: 52315
 2008-06-16 12:48:21 +00:00
Chris Lattner
5839247e92 Add #includes required by GCC 4.3, thanks for Zhongxing Xu 
for reporting this.

llvm-svn: 51926
 2008-06-04 04:46:14 +00:00
Chris Lattner
3e1cd5c9bf Remove unneeded code I added. 
llvm-svn: 51878
 2008-06-02 18:39:07 +00:00
Chris Lattner
ea60f0ccc3 move CannotBeNegativeZero to ValueTracking. Simplify some signbit comparisons. 
llvm-svn: 51864
 2008-06-02 01:29:46 +00:00
Chris Lattner
4960857273 move ComputeMaskedBits, MaskedValueIsZero, and ComputeNumSignBits 
out of instcombine into a new file in libanalysis.  This also teaches
ComputeNumSignBits about the number of sign bits in a constantint.

llvm-svn: 51863
 2008-06-02 01:18:21 +00:00