2ac2652779
Instcombine x-((x/y)*y) into a remainder operator.
...
llvm-svn: 42035
2007-09-17 17:31:57 +00:00
6d5da71288
Factor the trampoline transformation into a subroutine.
...
llvm-svn: 42021
2007-09-17 10:26:40 +00:00
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
d9111b88d1
silence a bogus gcc warning.
...
llvm-svn: 41949
2007-09-14 03:07:24 +00:00
9204663bcb
Turn calls to trampolines into calls to the underlying
...
nested function.
llvm-svn: 41844
2007-09-11 14:35:41 +00:00
e804567cd8
remove some dead code, this is handled by constant folding.
...
llvm-svn: 41819
2007-09-10 23:46:29 +00:00
85a51e0060
Don't zap back to back volatile load/stores
...
llvm-svn: 41759
2007-09-07 05:33:03 +00:00
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
0c5c47944a
Use isTrueWhenEqual. Thanks Chris!
...
llvm-svn: 41741
2007-09-06 02:40:25 +00:00
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
2320323647
Forgot to obey 80 column rule. Fixing that.
...
llvm-svn: 41725
2007-09-05 20:36:41 +00:00
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
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
0e258b8518
Cut off crazy computation. This helps PR1622 slightly.
...
llvm-svn: 41522
2007-08-28 04:23:55 +00:00
703623d571
Update InvokeInst to work like CallInst
...
llvm-svn: 41506
2007-08-27 19:04:21 +00:00
99c8ee2977
Transform a load from an undef/zero global into an undef/global even if we
...
have complex pointer manipulation going on. This allows us to compile
stuff like this:
__m128i foo(__m128i x){
static const unsigned int c_0[4] = { 0, 0, 0, 0 };
__m128i v_Zero = _mm_loadu_si128((__m128i*)c_0);
x = _mm_unpacklo_epi8(x, v_Zero);
return x;
}
into:
_foo:
xorps %xmm1, %xmm1
punpcklbw %xmm1, %xmm0
ret
llvm-svn: 41022
2007-08-11 18:48:48 +00:00
a8e4b4bc7b
when we see a unaligned load from an insufficiently aligned global or
...
alloca, increase the alignment of the load, turning it into an aligned load.
This allows us to compile:
#include <xmmintrin.h>
__m128i foo(__m128i x){
static const unsigned int c_0[4] = { 0, 0, 0, 0 };
__m128i v_Zero = _mm_loadu_si128((__m128i*)c_0);
x = _mm_unpacklo_epi8(x, v_Zero);
return x;
}
into:
_foo:
punpcklbw _c_0.5944, %xmm0
ret
.data
.lcomm _c_0.5944,16,4 # c_0.5944
instead of:
_foo:
movdqu _c_0.5944, %xmm1
punpcklbw %xmm1, %xmm0
ret
.data
.lcomm _c_0.5944,16,2 # c_0.5944
llvm-svn: 40971
2007-08-09 19:05:49 +00:00
8052019a20
It's safe to fold not of fcmp.
...
llvm-svn: 40870
2007-08-06 20:04:16 +00:00
f0da7975ea
at the end of instcombine, explicitly clear WorklistMap.
...
This shrinks it down to something small. On the testcase
from PR1432, this speeds up instcombine from 0.7959s to 0.5000s,
(59%)
llvm-svn: 40840
2007-08-05 08:47:58 +00:00
7132e00de7
This is the patch to provide clean intrinsic function overloading support in LLVM. It cleans up the intrinsic definitions and generally smooths the process for more complicated intrinsic writing. It will be used by the upcoming atomic intrinsics as well as vector and float intrinsics in the future.
...
This also changes the syntax for llvm.bswap, llvm.part.set, llvm.part.select, and llvm.ct* intrinsics. They are automatically upgraded by both the LLVM ASM reader and the bitcode reader. The test cases have been updated, with special tests added to ensure the automatic upgrading is supported.
llvm-svn: 40807
2007-08-04 01:51:18 +00:00
dc2cf228ce
Replacing a cast with another one does not reduce the number of
...
casts in the input.
llvm-svn: 40741
2007-08-02 17:23:38 +00:00
222b214be7
Disable an xform that causes an infinite loop. This fixes PR1594
...
llvm-svn: 40739
2007-08-02 16:56:32 +00:00
2740694450
wrap some long lines. Major offenders that are left include
...
gvn, gvnpre, dse, and predsimplify. To see these, use:
make check-line-length
llvm-svn: 40738
2007-08-02 16:53:43 +00:00
b0418fc607
Enhance instcombine to be more aggressive about folding casts of
...
operations of casts. This implements InstCombine/zext-fold.ll
llvm-svn: 40726
2007-08-02 06:11:14 +00:00
17a5dfe6f7
New CallInst interface to address GLIBCXX_DEBUG errors caused by
...
indexing an empty std::vector.
Updates to all clients.
llvm-svn: 40660
2007-08-01 03:43:44 +00:00
549e775e67
Fix a bug in GetKnownAlignment of packed structs.
...
llvm-svn: 40649
2007-07-31 20:13:21 +00:00
dff9d69cfb
Fix a typo/thinko.
...
llvm-svn: 40599
2007-07-30 19:53:57 +00:00
4512cd2cab
completely remove a transformation that is unsafe in the face of
...
undefs.
llvm-svn: 40439
2007-07-23 17:10:17 +00:00
5e39293e62
Apply temporary work around to fix llvm mis-compilation
...
reported in PR 1556.
llvm-svn: 40133
2007-07-21 00:34:29 +00:00
d82e4a19cc
this xform is already done by the constant folder.
...
llvm-svn: 40124
2007-07-20 22:06:41 +00:00
e31a61eeca
Optimize alignment of loads and stores.
...
llvm-svn: 40102
2007-07-20 16:34:21 +00:00
06c60b6032
Fix comments about vectors to use the current wording.
...
llvm-svn: 39921
2007-07-16 14:29:03 +00:00
640fd5124d
Repair a regression in Transforms/InstCombine/mul.ll that Reid noticed.
...
llvm-svn: 39896
2007-07-16 04:15:34 +00:00
d4fef8dbca
Implement shift-simplify.ll:test[45].
...
First teach instcombine that sign bit checks only demand the
sign bit, this allows simplify demanded bits to hack on
expressions better.
Second, teach instcombine that ashr is useless if only the
sign bit is demanded.
llvm-svn: 39880
2007-07-15 20:54:51 +00:00
06205d5567
Implement shift-simplify.ll:test3, turning:
...
(X << 31) <s 0 --> (X&1) != 0
This happens dozens of times in the CFE.
llvm-svn: 39879
2007-07-15 20:42:37 +00:00
fb032b176b
Significantly improve the documentation of the instcombine divide/compare
...
transformation. Also, keep track of which end of the integer interval overflows
occur on. This fixes Transforms/InstCombine/2007-06-21-DivCompareMiscomp.ll
and rdar://5278853, a miscompilation of perl.
llvm-svn: 37692
2007-06-21 18:11:19 +00:00
3bbec59e8b
refactor a bunch of code out of visitICmpInstWithInstAndIntCst into its own
...
routine.
llvm-svn: 37679
2007-06-20 23:46:26 +00:00
09a33a4f64
silence a bogus warning Duraid ran into.
...
llvm-svn: 37649
2007-06-19 05:43:49 +00:00
373389260f
Generalize many transforms to work on ~ of vectors in addition to ~ of
...
integer ops. This implements Transforms/InstCombine/and-or-not.ll
test3/test4, and finishes off PR1510
llvm-svn: 37589
2007-06-15 06:23:19 +00:00
481e28b1f5
Implement two xforms:
...
1. ~(~X | Y) === (X & ~Y)
2. (A|B) & ~(A&B) -> A^B
This allows us to transform ~(~(a|b) | (a&b)) -> a^b.
This implements PR1510 for scalar values.
llvm-svn: 37584
2007-06-15 05:58:24 +00:00
f14e5175ed
delete some obviously dead vector operations, which deletes a few thousand
...
operations from Duraids example.
llvm-svn: 37582
2007-06-15 05:26:55 +00:00
368e8872db
Fix PR1499.
...
llvm-svn: 37472
2007-06-06 17:08:48 +00:00
f79577d314
fix a miscompilation when passing a float through varargs
...
llvm-svn: 37297
2007-05-23 01:17:04 +00:00
a655a157a0
Fix Transforms/InstCombine/2007-05-18-CastFoldBug.ll, a bug that devastates
...
objc code due to the way the FE lowers objc message sends.
llvm-svn: 37256
2007-05-19 06:51:32 +00:00
234f96daa8
Fix Transforms/InstCombine/2007-05-14-Crash.ll
...
llvm-svn: 37057
2007-05-15 00:16:00 +00:00
b5650ebd6a
Fix typos.
...
llvm-svn: 36994
2007-05-11 21:10:54 +00:00
600db3eb96
fix regressions from my previous checking, including
...
Transforms/InstCombine/2006-12-08-ICmp-Combining.ll
llvm-svn: 36989
2007-05-11 16:58:45 +00:00
fe2b44de9f
fix Transforms/InstCombine/2007-05-10-icmp-or.ll
...
llvm-svn: 36984
2007-05-11 05:55:56 +00:00
e7da2d6ac3
Fix typo in comment.
...
llvm-svn: 36873
2007-05-06 13:37:16 +00:00
9b35b3e863
Fix a bug in my previous patch
...
llvm-svn: 36857
2007-05-06 07:24:03 +00:00
Dan Gohman