6d6f10fe91
fix PR5698
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llvm-svn: 90708
2009-12-06 17:17:23 +00:00
778cb92235
constant fold loads from memcpy's from global constants. This is important
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because clang lowers nontrivial automatic struct/array inits to memcpy from
a global array.
llvm-svn: 90698
2009-12-06 05:29:56 +00:00
93236ba327
add support for forwarding mem intrinsic values to non-local loads.
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llvm-svn: 90697
2009-12-06 04:54:31 +00:00
42376066eb
Handle forwarding local memsets to loads. For example, we optimize this:
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short x(short *A) {
memset(A, 1, sizeof(*A)*100);
return A[42];
}
to 'return 257' instead of doing the load.
llvm-svn: 90695
2009-12-06 01:57:02 +00:00
eb5bb1bf78
merge two tests.
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llvm-svn: 90691
2009-12-06 01:47:24 +00:00
a0e9d700dc
Generalize this optimization to work on equality comparisons between any two
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integers that are constant except for a single bit (the same n-th bit in each).
llvm-svn: 90646
2009-12-05 05:00:00 +00:00
1ddfd9f96c
Fix PR5551 by not ignoring the top level constantexpr when
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folding a load from constant.
llvm-svn: 90545
2009-12-04 06:29:29 +00:00
1c21aaca06
Small and carefully crafted testcase showing a miscompilation by GVN
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that I'm working on. This is manifesting as a miscompile of 255.vortex
on some targets. No check lines yet because it fails.
llvm-svn: 90520
2009-12-04 02:12:12 +00:00
0b6e260066
Fix this crasher, and add a FIXME for a missed optimization.
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llvm-svn: 90408
2009-12-03 03:43:29 +00:00
65812b58f2
add a failing testcase.
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llvm-svn: 90380
2009-12-03 01:46:18 +00:00
77c36d68f3
fix PR5673 by being more careful about pointers to functions.
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llvm-svn: 90369
2009-12-03 01:05:45 +00:00
b9878ee6b6
Cleanup/remove some parts of the lifetime region handling code in memdep and GVN,
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per Chris' comments. Adjust testcases to match.
llvm-svn: 90304
2009-12-02 07:35:19 +00:00
4ca1981e82
merge sext-2 into sext.ll
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llvm-svn: 90293
2009-12-02 05:34:35 +00:00
0a12a8f9fe
rename test
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llvm-svn: 90292
2009-12-02 05:32:33 +00:00
fe206d2a13
filecheckize
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llvm-svn: 90291
2009-12-02 05:32:16 +00:00
bb3eac9e7a
Fixed an assertion failure for tracking sext of a vector of integers
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llvm-svn: 90290
2009-12-02 04:59:58 +00:00
367b5eafb7
minimize this a bit more.
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llvm-svn: 90216
2009-12-01 07:30:01 +00:00
fd75b90d81
merge 2009-11-29-ReverseMap.ll into crash.ll
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llvm-svn: 90212
2009-12-01 06:22:10 +00:00
3c9aca9079
fix PR5640 by tracking whether a block is the header of a loop more
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precisely, which prevents us from infinitely peeling the loop.
llvm-svn: 90211
2009-12-01 06:04:43 +00:00
8a29dd4c7f
Add a testcase for the current llvm-gcc build failure.
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llvm-svn: 90112
2009-11-30 07:02:18 +00:00
e35e6f097d
Teach ConstantFolding to do a better job when folding gep(bitcast).
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This permits the devirtualization of llvm.org/PR3100#c9 when compiled by clang.
llvm-svn: 90099
2009-11-29 21:40:55 +00:00
1cc4cca193
add testcases for the foo_with_overflow op xforms added recently and
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fix bugs exposed by the tests. Testcases from Alastair Lynn!
llvm-svn: 90056
2009-11-29 02:57:29 +00:00
0d39613f65
add PR#
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llvm-svn: 90049
2009-11-29 01:28:58 +00:00
73d45454be
Add a testcase for:
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void test(int N, double* G) {
long j;
for (j = 1; j < N - 1; j++)
G[j] = G[j] + G[j+1] + G[j-1];
}
which we now compile to one load in the loop:
LBB1_2: ## %bb
movsd 16(%rsi,%rax,8), %xmm2
incq %rdx
addsd %xmm2, %xmm1
addsd %xmm1, %xmm0
movapd %xmm2, %xmm1
movsd %xmm0, 8(%rsi,%rax,8)
incq %rax
cmpq %rcx, %rax
jne LBB1_2
instead of:
LBB1_2: ## %bb
movsd 8(%rsi,%rax,8), %xmm0
addsd 16(%rsi,%rax,8), %xmm0
addsd (%rsi,%rax,8), %xmm0
movsd %xmm0, 8(%rsi,%rax,8)
incq %rax
cmpq %rcx, %rax
jne LBB1_2
llvm-svn: 90048
2009-11-29 01:15:43 +00:00
a73adac52e
add a testcase for
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void test9(int N, double* G) {
long j;
for (j = 1; j < N - 1; j++)
G[j+1] = G[j] + G[j+1];
}
llvm-svn: 90047
2009-11-29 01:04:40 +00:00
cd261c9c26
Implement PR5634.
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llvm-svn: 90046
2009-11-29 00:51:17 +00:00
218a3393f4
Teach memdep to look for memory use intrinsics during dependency queries. Fixes
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PR5574.
llvm-svn: 90045
2009-11-28 21:27:49 +00:00
32140312ca
reenable load address insertion in load pre. This allows us to
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handle cases like this:
void test(int N, double* G) {
long j;
for (j = 1; j < N - 1; j++)
G[j+1] = G[j] + G[j+1];
}
where G[1] isn't live into the loop.
llvm-svn: 90041
2009-11-28 16:08:18 +00:00
c7bc66dfc6
implement a FIXME: limit the depth that DecomposeGEPExpression goes the same
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way that getUnderlyingObject does it.
This fixes the 'DecomposeGEPExpression and getUnderlyingObject disagree!'
assertion on sqlite3.
llvm-svn: 90038
2009-11-28 15:12:41 +00:00
cf0b198827
disable value insertion for now, I need to figure out how
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to inform GVN about the newly inserted values. This fixes
PR5631.
llvm-svn: 90022
2009-11-27 22:50:07 +00:00
d141f885a1
I accidentally implemented this :)
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llvm-svn: 90014
2009-11-27 19:56:00 +00:00
2f0354ecf0
add support for recursive phi translation and phi
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translation of add with immediate. This allows us
to optimize this function:
void test(int N, double* G) {
long j;
G[1] = 1;
for (j = 1; j < N - 1; j++)
G[j+1] = G[j] + G[j+1];
}
to only do one load every iteration of the loop.
llvm-svn: 90013
2009-11-27 19:11:31 +00:00
e66f84e012
add two simple test cases we now optimize (to one load in the loop each) and one we don't (corresponding to the fixme I added yesterday).
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llvm-svn: 90012
2009-11-27 18:08:30 +00:00
2226db66ab
fix PR5436 by making the 'simple' case of SRoA not promote out of range
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array indexes. The "complex" case of SRoA still handles them, and correctly.
This fixes a weirdness where we'd correctly avoid transforming A[0][42] if
the 42 was too large, but we'd only do it if it was one gep, not two separate
ones.
llvm-svn: 90007
2009-11-27 16:37:41 +00:00
92ba18e9e4
filecheckize
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llvm-svn: 90006
2009-11-27 16:31:59 +00:00
25be93dfed
teach GVN's load PRE to insert computations of the address in predecessors
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where it is not available. It's unclear how to get this inserted
computation into GVN's scalar availability sets, Owen, help? :)
llvm-svn: 89997
2009-11-27 08:25:10 +00:00
41a5bba4e0
add some tests for memdep phi translation + PRE.
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llvm-svn: 89996
2009-11-27 06:42:42 +00:00
fa76d23c1d
this test is failing, and is expected to.
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llvm-svn: 89995
2009-11-27 06:36:28 +00:00
4f1552bde7
filecheckize
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llvm-svn: 89994
2009-11-27 06:33:09 +00:00
66426c70e6
rename test.
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llvm-svn: 89993
2009-11-27 06:31:55 +00:00
a9a76ccf56
Fix phi translation in load PRE to agree with the phi
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translation done by memdep, and reenable gep translation
again.
llvm-svn: 89992
2009-11-27 06:31:14 +00:00
b018bda665
redisable this, my bootstrap worked because it wasn't an optimized build, whoops.
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llvm-svn: 89991
2009-11-27 05:53:01 +00:00
fb8a718fc3
try again.
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llvm-svn: 89990
2009-11-27 05:19:56 +00:00
14444f5c1a
this is causing buildbot failures, disable for now.
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llvm-svn: 89985
2009-11-27 01:52:22 +00:00
5030c6ab21
teach phi translation of GEPs to simplify geps like 'gep x, 0'.
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This allows us to compile the example from PR5313 into:
LBB1_2: ## %bb
incl %ecx
movb %al, (%rsi)
movslq %ecx, %rax
movb (%rdi,%rax), %al
testb %al, %al
jne LBB1_2
instead of:
LBB1_2: ## %bb
movslq %eax, %rcx
incl %eax
movb (%rdi,%rcx), %cl
movb %cl, (%rsi)
movslq %eax, %rcx
cmpb $0, (%rdi,%rcx)
jne LBB1_2
llvm-svn: 89981
2009-11-27 00:34:38 +00:00
4c88e814b8
teach memdep to do trivial PHI translation of GEPs. More to
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come.
llvm-svn: 89979
2009-11-27 00:07:37 +00:00
9bd2136ca3
Teach memdep to phi translate bitcasts. This allows us to compile
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the example in GCC PR16799 to:
LBB1_2: ## %bb1
movl %eax, %eax
subq %rax, %rdi
movq %rdi, (%rcx)
movl (%rdi), %eax
testl %eax, %eax
je LBB1_2
instead of:
LBB1_2: ## %bb1
movl (%rdi), %ecx
subq %rcx, %rdi
movq %rdi, (%rax)
cmpl $0, (%rdi)
je LBB1_2
llvm-svn: 89978
2009-11-26 23:41:07 +00:00
dfaa592de1
convert to filecheck
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llvm-svn: 89977
2009-11-26 23:32:59 +00:00
a73ecf0b00
Fix PR5471 by removing an instcombine xform. Some pieces of the code
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generates store to undef and some generates store to null as the idiom
for undefined behavior. Since simplifycfg zaps both, don't remove the
undefined behavior in instcombine.
llvm-svn: 89971
2009-11-26 22:04:42 +00:00
2b8fed15e0
Reverting patch in revision 89758, initial attempt at fixing PR5373 has proven to be bogus.
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llvm-svn: 89844
2009-11-25 05:38:41 +00:00
Chris Lattner