22f339010c
Use "opt < %s" instead of "opt %s" so that opt doesn't print the test
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filename in the output, which interferes with the tests' grep lines.
llvm-svn: 81263
2009-09-08 22:57:49 +00:00
4f2527cd6d
Convert a few more opt | llvm-dis to opt -S.
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llvm-svn: 81261
2009-09-08 22:41:33 +00:00
72a13d2476
Use opt -S instead of piping bitcode output through llvm-dis.
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llvm-svn: 81257
2009-09-08 22:34:10 +00:00
9ce1781ef4
remove an extremely dubious instcombine transformation of
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extractelement(load).
llvm-svn: 81239
2009-09-08 18:48:01 +00:00
9737a63ed8
Change these tests to feed the assembly files to opt directly, instead
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of using llvm-as, now that opt supports this.
llvm-svn: 81226
2009-09-08 16:50:01 +00:00
d3210e1a20
instcombine transforms vector loads that are only used by
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extractelement operations into a bitcast of the pointer,
then a gep, then a scalar load. Disable this when the vector
only has one element, because it leads to infinite loops in
instcombine (PR4908).
This transformation seems like a really bad idea to me, as it
will likely disable CSE of vector load/stores etc and can be
better done in the code generator when profitable. This
goes all the way back to the first days of packed types,
r25299 specifically.
I'll let those people who care about the performance of vector
code decide what to do with this.
llvm-svn: 81185
2009-09-08 03:44:51 +00:00
0cdbc7a2ca
fix ComputeMaskedBits handling of zext/sext/trunc to work with vectors.
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This fixes PR4905
llvm-svn: 81174
2009-09-08 00:13:52 +00:00
7fcfc4fc31
Don't depend on Tcl behavior of redirecting stderr for all commands in a
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pipeline.
llvm-svn: 81153
2009-09-07 19:26:02 +00:00
b9ea94c990
Eliminate uses of %prcontext.
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- I'd appreciate it if someone else eyeballs my changes to make sure I captured
the intent of the test.
llvm-svn: 81083
2009-09-05 11:35:16 +00:00
64b5842986
fix PR4837, some bugs folding vector compares. These
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return a vector of i1, not i1 itself.
llvm-svn: 80761
2009-09-02 05:12:37 +00:00
4e3e930743
fix a bug I introduced with my 'instcombine builder' refactoring
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changes: SimplifyDemandedBits can't use the builder yet because it
has the wrong insertion point. This fixes a crash building
MultiSource/Benchmarks/PAQ8p
llvm-svn: 80537
2009-08-31 04:36:22 +00:00
9e371f4b8b
suck a bunch more gep tests into getelementptr.ll and filecheckize them all.
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llvm-svn: 80517
2009-08-30 21:31:34 +00:00
89a9bb77e2
consolodate various GEP tests into getelementptr.ll using filecheck.
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llvm-svn: 80514
2009-08-30 21:02:36 +00:00
2708a312db
another huge testcase, this time from 'gs' in llvm-test.
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llvm-svn: 80513
2009-08-30 21:02:02 +00:00
3e1b67f62f
remove another poorly-reduced testcase which came from ldecod in llvm-test.
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llvm-svn: 80512
2009-08-30 21:01:14 +00:00
8a2905e132
this testcase is 500 lines long and is distilled from bzip2, just
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remove it.
llvm-svn: 80511
2009-08-30 21:00:11 +00:00
4698e19cba
convert to filecheck
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llvm-svn: 80510
2009-08-30 20:48:15 +00:00
73913f4cd3
Fix PR4748: don't fold gep(bitcast(x)) into bitcast(gep) when x
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is itself a bitcast. Since we have gep(bitcast(bitcast(y))) in this
case, just wait for the two bitcasts to get zapped. This prevents
instcombine from confusing some aliasing stuff, and allows it to
directly eliminate the load in the testcase.
llvm-svn: 80508
2009-08-30 20:38:21 +00:00
0d4bbf2c4a
Remove obsolete -f flags.
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llvm-svn: 79992
2009-08-25 15:38:29 +00:00
23e62c532c
Change getelementptr folding to use APInt instead of uint64_t for
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offset computations. This fixes a truncation bug on targets that
don't have 64-bit pointers.
llvm-svn: 79639
2009-08-21 16:52:54 +00:00
c59ba42b0f
Fix a bug in the over-index constant folding. When over-indexing an
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array member of a struct, it's possible to land in an arbitrary position
inside that struct, such that attempting to find further getelementptr
indices will fail. In such cases, folding cannot be done.
llvm-svn: 79485
2009-08-19 22:46:59 +00:00
81ce842ecf
Canonicalize indices in a constantexpr GEP. If Indices exceed the
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static extents of the static array type, it causes GlobalOpt and
other passes to be more conservative. This canonicalization also
allows the constant folder to add "inbounds" to GEPs.
llvm-svn: 79440
2009-08-19 18:18:36 +00:00
a95379d165
When InstCombine simplifies a load -> extract element to gep -> load, place
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the new load by the old load instead of by the extract element because
a store could have occurred between the load and extract element.
llvm-svn: 78891
2009-08-13 05:12:13 +00:00
e274526d78
Make LLVM Assembly dramatically easier to read by aligning the comments,
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using formatted_raw_ostream's PadToColumn.
Before:
bb1: ; preds = %bb
%2 = sext i32 %i.01 to i64 ; <i64> [#uses=1]
%3 = getelementptr double* %p, i64 %2 ; <double*> [#uses=1]
%4 = load double* %3, align 8 ; <double> [#uses=1]
%5 = fmul double %4, 1.100000e+00 ; <double> [#uses=1]
%6 = sext i32 %i.01 to i64 ; <i64> [#uses=1]
%7 = getelementptr double* %p, i64 %6 ; <double*> [#uses=1]
After:
bb1: ; preds = %bb
%2 = sext i32 %i.01 to i64 ; <i64> [#uses=1]
%3 = getelementptr double* %p, i64 %2 ; <double*> [#uses=1]
%4 = load double* %3, align 8 ; <double> [#uses=1]
%5 = fmul double %4, 1.100000e+00 ; <double> [#uses=1]
%6 = sext i32 %i.01 to i64 ; <i64> [#uses=1]
%7 = getelementptr double* %p, i64 %6 ; <double*> [#uses=1]
Several tests required whitespace adjustments.
llvm-svn: 78816
2009-08-12 17:23:50 +00:00
4ac2f639cd
Transform -X/C to X/-C, implementing a README.txt entry.
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llvm-svn: 78812
2009-08-12 16:37:02 +00:00
908da3d97e
Optimize (x/C)*C to x if the division is exact.
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llvm-svn: 78811
2009-08-12 16:33:09 +00:00
dbae4db67a
Optimize exact sdiv by a constant power of 2 to ashr.
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llvm-svn: 78714
2009-08-11 20:47:47 +00:00
a72f856aa4
Don't assume that external global variables are aligned at their preferred
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alignment. Only the minimum alignment guaranteed by the ABI may be assumed.
llvm-svn: 78668
2009-08-11 15:50:03 +00:00
eaed26eb0e
Add -disable-output. Thanks Bill!
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llvm-svn: 78009
2009-08-03 22:24:22 +00:00
f011f5a8a2
Add a new Constant::getIntegerValue helper function, and convert a
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few places in InstCombine to use it, to fix problems handling pointer
types. This fixes the recent llvm-gcc bootstrap error.
llvm-svn: 78005
2009-08-03 22:07:33 +00:00
31a9b9880b
Teach instcombine to respect and preserve inbounds. Add inbounds
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to a few tests where it is required for the expected transformation.
llvm-svn: 77290
2009-07-28 01:40:03 +00:00
7152d39d6d
merge vector-casts-0.ll into vector-casts.ll
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llvm-svn: 76864
2009-07-23 05:33:39 +00:00
7d55541e56
Make some existing optimizations that would only trigger on scalars
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also apply to vectors. This allows us to compile this:
#include <emmintrin.h>
__m128i a(__m128 a, __m128 b) { return a==a & b==b; }
__m128i b(__m128 a, __m128 b) { return a!=a | b!=b; }
to:
_a:
cmpordps %xmm1, %xmm0
ret
_b:
cmpunordps %xmm1, %xmm0
ret
with clang instead of to a ton of horrible code.
llvm-svn: 76863
2009-07-23 05:32:17 +00:00
b4ff7de8bd
convert a test to filecheck format. This fixes an endemic problem
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with negative tests: this test wasn't checking what it thought it was
because it was grepping .bc, not .ll.
llvm-svn: 76861
2009-07-23 05:27:48 +00:00
4a3affbdcf
rename test
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llvm-svn: 76860
2009-07-23 05:25:12 +00:00
a3a6dea8d5
Add a testcase for PR2831.
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llvm-svn: 76527
2009-07-21 01:02:18 +00:00
33a3fd0b9c
Revert the addition of hasNoPointerOverflow to GEPOperator.
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Getelementptrs that are defined to wrap are virtually useless to
optimization, and getelementptrs that are undefined on any kind
of overflow are too restrictive -- it's difficult to ensure that
all intermediate addresses are within bounds. I'm going to take
a different approach.
Remove a few optimizations that depended on this flag.
llvm-svn: 76437
2009-07-20 17:43:30 +00:00
048e78fc5b
Canonicalize bitcasts between types like <1 x i64> and i64 to
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insertelement/extractelement.
I'm not entirely sure this is precisely what we want to do: should we
prefer bitcast(insertelement) or insertelement(bitcast)? Similarly. should we
prefer extractelement(bitcast) or bitcast(extractelement)?
llvm-svn: 76345
2009-07-18 23:06:53 +00:00
eb6bcf3462
Back out 76300; apparently the preference is to canonicalize the other
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way (bitcast -> insert/extractelement).
llvm-svn: 76325
2009-07-18 19:04:16 +00:00
52dbfc21c5
Add combine: X sdiv (1 << Y) -> X udiv (1 << Y) when X doesn't have the
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sign bit set.
llvm-svn: 76304
2009-07-18 09:53:21 +00:00
a807aae226
Canonicalize insert/extractelement from single-element vectors into
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bitcasts.
It would also be possible to canonicalize the other way; does anyone
have a preference?
llvm-svn: 76300
2009-07-18 09:07:47 +00:00
ebe66ab13b
Don't restrict the set of instructions where we try to constant-fold the
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operands; it's possible to end up with a constant-foldable operand to
most instructions, even those which can't trap.
llvm-svn: 75845
2009-07-15 22:13:34 +00:00
14379df4e6
Fix trivial todo in instcombine.
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llvm-svn: 75586
2009-07-14 02:01:53 +00:00
4b95026194
PR4548: optimize zext+udiv+trunc to udiv.
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llvm-svn: 75539
2009-07-13 22:46:01 +00:00
116e3b3ef1
Fix bug in run-line.
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llvm-svn: 75534
2009-07-13 22:31:30 +00:00
7e1716dc9d
Canonicalize boolean +/- a constant to a select.
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(I think it's reasonably clear that we want to have a canonical form for
constructs like this; if anyone thinks that a select is not the best
canonical form, please tell me.)
llvm-svn: 75531
2009-07-13 22:27:52 +00:00
edb8407f0c
do not try to analyze bitcasts from i64 to <2 x i32> in ComputedMaskedBits. While
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we could do this, doing so requires adjusting the demanded mask and the code isn't
doing that yet. This fixes PR4495
llvm-svn: 74699
2009-07-02 16:04:08 +00:00
83348f80b6
Fix an instcombine abort on a scalar-to-vector bitcast. This fixes PR4487.
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llvm-svn: 74646
2009-07-01 21:38:46 +00:00
56bd02c55c
Generalize the zext(trunc(t) & C) instcombine to work even with
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C is not a low-bits mask, and add a similar instcombine for
zext((trunc(t) & C) ^ C).
llvm-svn: 73705
2009-06-18 16:30:21 +00:00
7f836c7c61
Instcombine zext(trunc(x) & mask) to x&mask, even if the trunc has
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multiple users.
llvm-svn: 73656
2009-06-17 23:17:05 +00:00
Dan Gohman