Commit Graph

35 Commits

Author SHA1 Message Date
Dan Gohman
bd5ce52740 Fix llvm::ComputeNumSignBits to handle pointer types
conservatively correctly, instead of aborting.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73908 91177308-0d34-0410-b5e6-96231b3b80d8
2009-06-22 22:02:32 +00:00
Dan Gohman
6de29f8d96 Support vector casts in more places, fixing a variety of assertion
failures.

To support this, add some utility functions to Type to help support
vector/scalar-independent code. Change ConstantInt::get and
ConstantFP::get to support vector types, and add an overload to
ConstantInt::get that uses a static IntegerType type, for
convenience.

Introduce a new getConstant method for ScalarEvolution, to simplify
common use cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73431 91177308-0d34-0410-b5e6-96231b3b80d8
2009-06-15 22:12:54 +00:00
Dan Gohman
ae3a0be92e Split the Add, Sub, and Mul instruction opcodes into separate
integer and floating-point opcodes, introducing
FAdd, FSub, and FMul.

For now, the AsmParser, BitcodeReader, and IRBuilder all preserve
backwards compatability, and the Core LLVM APIs preserve backwards
compatibility for IR producers. Most front-ends won't need to change
immediately.

This implements the first step of the plan outlined here:
http://nondot.org/sabre/LLVMNotes/IntegerOverflow.txt


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72897 91177308-0d34-0410-b5e6-96231b3b80d8
2009-06-04 22:49:04 +00:00
Dan Gohman
3925043af0 When the low bits of one operand of an add are zero, that number
of low bits of the other operand are preserved in the output.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72365 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-24 18:02:35 +00:00
Dan Gohman
9004c8afd4 Teach ValueTracking a new way to analyze PHI nodes, and and teach
Instcombine to be more aggressive about using SimplifyDemandedBits
on shift nodes. This allows a shift to be simplified to zero in the
included test case.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72204 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-21 02:28:33 +00:00
Duncan Sands
777d2306b3 Rename PaddedSize to AllocSize, in the hope that this
will make it more obvious what it represents, and stop
it being confused with the StoreSize.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71349 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-09 07:06:46 +00:00
Bill Wendling
0582ae99ba Oops...I committed too much.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66867 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-13 04:39:26 +00:00
Bill Wendling
c7a09ab311 Temporarily XFAIL this test.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66866 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-13 04:37:11 +00:00
Dan Gohman
0001e56f15 Fix a ValueTracking rule: RHS means operand 1, not 0. Add a simple
ashr instcombine to help expose this code. And apply the fix to
SelectionDAG's copy of this code too.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65364 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-24 02:00:40 +00:00
Chris Lattner
79abedb83a Eliminate use of uint32_t to improve compatibility with cygwin
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62590 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-20 18:22:57 +00:00
Duncan Sands
ceb4d1aecb Rename getABITypeSize to getTypePaddedSize, as
suggested by Chris.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62099 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-12 20:38:59 +00:00
Chris Lattner
0f2831c820 ValueTracker can't assume that an alloca with no specified alignment
will get its preferred alignment.  It has to be careful and cautiously assume
it will just get the ABI alignment.  This prevents instcombine from rounding
up the alignment of a load/store without adjusting the alignment of the alloca.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61934 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-08 19:28:38 +00:00
David Greene
c714f13090 Re-apply 55137 with fixes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58296 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-27 23:24:03 +00:00
Bill Wendling
d611cf6dcd Temporarily reverting r55137. This was causing the bootstrap to go into an
infinite loop.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55149 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-21 22:40:10 +00:00
David Greene
dce51c372a Fix ComputeMaskedBits to handle phis correctly. We need to take the
minimum of the known zeros.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55137 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-21 20:45:12 +00:00
Dan Gohman
a60832b018 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54767 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-13 23:12:35 +00:00
Matthijs Kooijman
dddc827125 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



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53670 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-16 10:47:35 +00:00
Evan Cheng
0ff39b3feb - 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52891 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-30 07:31:25 +00:00
Anton Korobeynikov
6d116bc7ce 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52884 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-29 17:57:03 +00:00
Chris Lattner
b746b82113 Add back the capability to include nul characters in strings with
GetConstantStringInfo.  This will hopefully restore llvm-gcc to 
happy bootstrap land.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52851 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-28 05:33:32 +00:00
Chris Lattner
3284d42c17 Tighten up checking.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52850 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-28 04:37:04 +00:00
Chris Lattner
3648f9f0ae fix the regressions from Eric's patch by making GetConstantStringInfo
tolerate a non-nul-terminated string, and handling a direct global 
reference.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52813 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-27 03:36:51 +00:00
Owen Anderson
aefacb5972 Reserve the size we'll need in advance.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52763 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-26 04:47:41 +00:00
Eric Christopher
0d2b0aba42 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52748 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-26 00:31:12 +00:00
Duncan Sands
9954c76f2c Fix some warnings reported by gcc-4.3. Hopefully
this still compiles on windows - I can't test!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52488 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-19 08:47:31 +00:00
Matthijs Kooijman
3faf9df08f Use a SmallVector instead of an array, since auto_ptr doesn't handle arrays
properly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52390 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17 08:24:37 +00:00
Matthijs Kooijman
0a9aaf46be 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52328 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-16 14:13:46 +00:00
Matthijs Kooijman
9772891219 Make the InsertBefore argument to FindInsertedValue optional, so you can find an inserted value without modifying the code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52319 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-16 13:28:31 +00:00
Matthijs Kooijman
0a7413dad8 Pass around Instruction* instead of Instruction& in FindInsertedValue and friends.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52318 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-16 13:13:08 +00:00
Matthijs Kooijman
710eb236e6 80 column fixes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52316 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-16 12:57:37 +00:00
Matthijs Kooijman
b23d5adbc8 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).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52315 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-16 12:48:21 +00:00
Chris Lattner
32a9e7a265 Add #includes required by GCC 4.3, thanks for Zhongxing Xu
for reporting this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51926 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-04 04:46:14 +00:00
Chris Lattner
d82e511aec Remove unneeded code I added.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51878 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-02 18:39:07 +00:00
Chris Lattner
833f25d79e move CannotBeNegativeZero to ValueTracking. Simplify some signbit comparisons.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51864 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-02 01:29:46 +00:00
Chris Lattner
173234a68f 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51863 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-02 01:18:21 +00:00