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652 Commits

Author SHA1 Message Date
Devang Patel
c60c8e35eb xfail 
llvm-svn: 55914
 2008-09-08 16:24:30 +00:00
Duncan Sands
62431a29a5 Update the callgraph correctly in ArgumentPromotion. 
llvm-svn: 55895
 2008-09-08 11:07:35 +00:00
Duncan Sands
c4ec7871bf When PruneEH turned an invoke into an ordinary 
call (thus changing the call site) it didn't
inform the callgraph about this.  But the
call site does matter - as shown by the testcase,
the callgraph become invalid after the inliner
ran (with an edge between two functions simply
missing), resulting in wrong deductions by
GlobalsModRef.

llvm-svn: 55872
 2008-09-06 17:19:29 +00:00
Nick Lewycky
57cebeaeba Don't crash when trying to constant fold a vector with some elements that can't 
be folded. Instead, fail to fold the entire vector.

We could also return a vector with some elements folded and some not. If anyone
thinks that's a better approach, please speak up!

llvm-svn: 55689
 2008-09-03 05:54:33 +00:00
Devang Patel
4dfecae8fe Check iteration count. 
llvm-svn: 55680
 2008-09-03 00:10:56 +00:00
Devang Patel
a1e2066b1d If all IV uses are extending integer IV then change the type of IV itself, if possible. 
llvm-svn: 55674
 2008-09-02 22:18:08 +00:00
Devang Patel
cda9086d29 respect inline=never and inline=always notes. 
llvm-svn: 55673
 2008-09-02 22:16:13 +00:00
Devang Patel
211c05f7a3 If IV is used in a int-to-float cast inside the loop then try to eliminate the cast operation. 
llvm-svn: 55374
 2008-08-26 17:57:54 +00:00
Chris Lattner
72ee6ebb0a Fix PR2423 by checking all indices for out of range access, not only 
indices that start with an array subscript.  x->field[10000] is just 
as bad as (*X)[14][10000].

llvm-svn: 55226
 2008-08-23 05:21:06 +00:00
Nick Lewycky
7b87c4d8a4 Revert r54876 r54877 r54906 and r54907. Evan found that these caused a 20% 
slowdown in bzip2.

llvm-svn: 55113
 2008-08-21 05:56:10 +00:00
Bill Wendling
98fb8113e8 XFAIL this test for now. 
llvm-svn: 54929
 2008-08-18 18:29:54 +00:00
Nick Lewycky
30a0ad8900 Consider the case where xor by -1 and xor by 128 have been combined already to 
produce an xor by 127.

llvm-svn: 54906
 2008-08-17 19:58:24 +00:00
Evan Cheng
5ebbd688ec Didn't mean to change this. 
llvm-svn: 54904
 2008-08-17 19:25:28 +00:00
Evan Cheng
6534c78383 Fix a (u)comiss intrinsic lowering bug. It was using anyext which can return junk in higher bits. Patch by Nate Begeman. 
llvm-svn: 54903
 2008-08-17 19:22:34 +00:00
Nick Lewycky
205be593b8 Xor'ing both sides of icmp by sign-bit is equivalent to swapping signedness of 
the predicate.

Also, make this optz'n apply in more cases where it's safe to do so.

llvm-svn: 54876
 2008-08-17 07:34:14 +00:00
Owen Anderson
42c1d6c7b9 Remove GCSE and LoadVN from the testsuite. 
llvm-svn: 54832
 2008-08-16 00:00:54 +00:00
Devang Patel
a8e9ee0529 Reapply 54786. Add overflow and number of mantissa bits checks. 
llvm-svn: 54821
 2008-08-15 21:21:34 +00:00
Evan Cheng
b2e1459e48 Revert 54786. It's not checking for overflows, etc. 
llvm-svn: 54813
 2008-08-15 08:12:11 +00:00
Devang Patel
67f9b08a91 If IV is used in a int-to-float cast inside the loop then try to eliminate the cast opeation. 
llvm-svn: 54786
 2008-08-14 20:58:31 +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
Dan Gohman
374d9328b7 Fix SCCP's handling of struct value loads and stores. SCCP doesn't 
track individual leaf values in such cases, so it needs to treat
struct values as normal values in this case.

llvm-svn: 54760
 2008-08-13 21:22:48 +00:00
Devang Patel
a82e51a430 Check sign to detect overflow before changing compare stride. 
llvm-svn: 54710
 2008-08-13 02:05:14 +00:00
Chris Lattner
ae09ade343 Implement support for simplifying vector comparisons by 0.0 and 1.0 like we 
do for scalars.  Patch contributed by Nicolas Capens

This also generalizes the previous xforms to work on long double, now that 
isExactlyValue works for long double.

llvm-svn: 54653
 2008-08-11 22:06:05 +00:00
Matthijs Kooijman
cb2af3cd69 Add a basic test for the SRETPromotion pass. 
llvm-svn: 54466
 2008-08-07 15:55:18 +00:00
Matthijs Kooijman
7f32ea1320 Move two tests from SRETPromotion to Inline, since they only call opt -inline. 
llvm-svn: 54465
 2008-08-07 15:36:46 +00:00
Dan Gohman
4ad77e1ca2 Fix a shufflevector instcombine that was emitting invalid masks indices 
when it meant to be emitting undef indices.

llvm-svn: 54417
 2008-08-06 18:17:32 +00:00
Evan Cheng
cbb33fb6e8 PR2535, not PR2355. 
llvm-svn: 54416
 2008-08-06 18:06:48 +00:00
Evan Cheng
c5cc2cb4aa Fix PR2355: bug in ChangeCompareStride. When the loop termination compare is the only use of its iv stride, the stride can be eliminated by moving it to another stride. If the scale is negative, swap the predicate instead of using a inverse predicate. 
llvm-svn: 54415
 2008-08-06 18:04:43 +00:00
Chris Lattner
55b99a6739 optimize a common idiom generated by clang for bitfield access, PR2638. 
llvm-svn: 54408
 2008-08-06 07:35:52 +00:00
Chris Lattner
cae04940bd Zap sitofp/fptoui pairs. In all cases when the sign difference 
matters, the result is undefined anyway.

llvm-svn: 54396
 2008-08-06 05:13:06 +00:00
Nick Lewycky
0bf3c812d2 Reinstate this optimization, but without the miscompile. Thanks to Bill for 
tracking down that this was breaking llvm-gcc bootstrap on Linux.

llvm-svn: 54394
 2008-08-06 04:54:03 +00:00
Bill Wendling
1854852a75 Just grep for through the LL code instead of the ASM code 
llvm-svn: 54389
 2008-08-06 00:10:32 +00:00
Bill Wendling
aea14c2dfe Add default architecture. 
llvm-svn: 54384
 2008-08-05 23:36:00 +00:00
Bill Wendling
f69c83e554 Testcase for PR2629. 
llvm-svn: 54377
 2008-08-05 22:23:59 +00:00
Bill Wendling
3882f060ef Revert r53282. This was causing a miscompile on Linux. Also, the transformation 
looks bogus. Please see PR2629 for details on why this is breaking things.

llvm-svn: 54372
 2008-08-05 21:23:45 +00:00
Matthijs Kooijman
7199907f50 Add -unroll-allow-partial command line option that enabled the loop unroller to 
partially unroll a loop when fully unrolling would not fit under the threshold.

Patch by Mikael Lepistö.

llvm-svn: 54160
 2008-07-29 13:21:23 +00:00
Matthijs Kooijman
77948dbbc2 Restructure ArgumentPromotion a bit. Instead of just having a single boolean 
that says "unconditional loads from this argument are safe", we now keep track
of the safety per set of indices from which loads happen. This prevents
ArgPromotion from promoting loads that aren't really valid. As an added effect,
this will now disregard the the type of the indices passed to a GEP, so
"load GEP %A, i32 1" and "load GEP %A, i64 1" will result in a single argument,
not two.

This fixes PR2598, for which a testcase has been added as well.

llvm-svn: 54159
 2008-07-29 10:00:13 +00:00
Owen Anderson
4d84a90fa9 Add support for eliminating stores that store the same value that was just loaded. 
This fixes PR2599.

llvm-svn: 54133
 2008-07-28 16:14:26 +00:00
Dan Gohman
1ecbcecdf3 Put the LICM of constant GlobalVariables, introduced in r53945, under a 
command-line option, and disable it by default. It introduced performance
regressions because CodeGen is currently not able to remat such loads.

llvm-svn: 53997
 2008-07-24 23:57:25 +00:00
Chris Lattner
8eb899ecbc "Allow LICM to sink or lift loads from constant memory. Also add a test 
case for this.

This allows instructions like loads from global variables declared to
be constant to be moved out of loops."

Patch by Stefanus Du Toit!

llvm-svn: 53945
 2008-07-23 05:06:28 +00:00
Dan Gohman
6564581be0 Enable first-class aggregates support. 
Remove the GetResultInst instruction. It is still accepted in LLVM assembly
and bitcode, where it is now auto-upgraded to ExtractValueInst. Also, remove
support for return instructions with multiple values. These are auto-upgraded
to use InsertValueInst instructions.

The IRBuilder still accepts multiple-value returns, and auto-upgrades them
to InsertValueInst instructions.

llvm-svn: 53941
 2008-07-23 00:34:11 +00:00
Dan Gohman
693339b859 Add the PR number to the test. 
llvm-svn: 53880
 2008-07-21 21:50:25 +00:00
Dan Gohman
8f7b6c8113 Fix a bug in LSR's dead-PHI cleanup. If a PHI has a def-use chain that 
leads into a cycle involving a different PHI, LSR got stuck running
around that cycle looking for the original PHI. To avoid this, keep
track of visited PHIs and stop searching if we see one more than once.
This fixes PR2570.

llvm-svn: 53879
 2008-07-21 21:45:02 +00:00
Matthijs Kooijman
5ec5e264e4 Make GlobalOpt preserve address spaces when scalar replacing aggregate globals. 
llvm-svn: 53716
 2008-07-17 11:59:53 +00:00
Chris Lattner
eccd57d118 Fix PR2553 
llvm-svn: 53715
 2008-07-17 06:07:20 +00:00
Matthijs Kooijman
c05651e3ce Add a few cases to instcombine's extractvalue testcase. 
llvm-svn: 53675
 2008-07-16 12:57:25 +00:00
Matthijs Kooijman
0625e0fda6 Un-XFAIL multdeadretval, since instcombine now properly handles the mess deadargelim leaves behind :-) 
llvm-svn: 53674
 2008-07-16 12:56:52 +00:00
Evan Cheng
7218339189 Fix PR2296. Do not transform x86_sse2_storel_dq into a full-width store. 
llvm-svn: 53666
 2008-07-16 07:28:14 +00:00
Matthijs Kooijman
45140a0497 XFAIL the multdeadretval test for now, I will be fixing instcombine to make it work again tomorrow. 
llvm-svn: 53614
 2008-07-15 16:05:09 +00:00
Matthijs Kooijman
48fd953b49 Remove a few tests which no longer hold for deadargelim (since it is now 
allowed to canonicalize return values).

Add a test that checks if return value and function attributes are not removed.

llvm-svn: 53612
 2008-07-15 14:57:01 +00:00