Chris Lattner
50fb46983c
Teach loop rotate to hoist trivially invariant instructions
...
in the duplicated block instead of duplicating them.
Duplicating them into the end of the loop and the preheader
means that we got a phi node in the header of the loop,
which prevented LICM from hoisting them. GVN would
usually come around later and merge the duplicated
instructions so we'd get reasonable output... except that
anything dependent on the shoulda-been-hoisted value can't
be hoisted. In PR5319 (which this fixes), a memory value
didn't get promoted.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113134 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-06 01:10:22 +00:00
Chris Lattner
e971131695
fix PR8063, a crash in globalopt in the malloc analysis code.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113109 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-05 17:20:46 +00:00
Dan Gohman
ffa75cdcf8
Fix LoopSimplify to notify ScalarEvolution when splitting a loop backedge
...
into an inner loop, as the new loop iteration may differ substantially.
This fixes PR8078.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113057 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-04 02:42:48 +00:00
Chris Lattner
469996400c
fix a bug in my licm rewrite when a load from the promoted memory
...
location is being re-stored to the memory location. We would get
a dangling pointer from the SSAUpdate data structure and miss a
use. This fixes PR8068
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113042 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-04 00:12:30 +00:00
Owen Anderson
597dad35b8
Propagate non-local comparisons. Fixes PR1757.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113025 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-03 22:47:08 +00:00
Owen Anderson
1593dd6779
Add support for simplifying a load from a computed value to a load from a global when it
...
is provable that they're equivalent. This fixes PR4855.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112994 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-03 19:08:37 +00:00
Owen Anderson
82de2e1a24
Add a test for PR4413, which was apparently fixed at some point in the past.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112987 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-03 18:33:08 +00:00
Owen Anderson
ba4d0a005c
Add PR number to test.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112971 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-03 16:58:25 +00:00
Chris Lattner
571c15c6de
more test cleanup
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112892 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-02 22:38:56 +00:00
Chris Lattner
042ff0358d
remove some noise from tests.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112889 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-02 22:35:33 +00:00
Chris Lattner
9c282011e6
fix more AST updating bugs, correcting miscompilation in PR8041
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112878 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-02 22:19:10 +00:00
Owen Anderson
df0b94bcea
Fix typo. I accidentally edited the wrong file before my last commit.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112851 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-02 19:52:06 +00:00
Owen Anderson
66048c2169
Fix a bug in LazyValueInfo that CorrelatedValuePropagation exposed: In the LVI lattice, undef and the full set ConstantRange should not
...
be treated as equivalent.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112843 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-02 18:23:58 +00:00
Duncan Sands
8cf2663227
Print the number of uses of a function in the .ll since it can be informative
...
and there seems to be no reason not to.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112812 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-02 08:52:23 +00:00
Chris Lattner
72eaa0e5eb
deepen my MMX/SRoA hack to avoid hurting non-x86 codegen.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112763 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-01 23:09:27 +00:00
Dan Gohman
b0a57210a4
Fix loop unswitching's assumption that a code path which either
...
infinite loops or exits will eventually exit. This fixes PR5373.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112745 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-01 21:46:45 +00:00
Bill Wendling
ee70d3b27f
The output of opt -stats must be sent to stderr. Patch by NAKAMURA Takumi!
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112724 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-01 18:32:56 +00:00
Chris Lattner
91abace4ef
add a gross hack to work around a problem that Argiris reported
...
on llvmdev: SRoA is introducing MMX datatypes like <1 x i64>,
which then cause random problems because the X86 backend is
producing mmx stuff without inserting proper emms calls.
In the short term, force off MMX datatypes. In the long term,
the X86 backend should not select generic vector types to MMX
registers. This is being worked on, but won't be done in time
for 2.8. rdar://8380055
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112696 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-01 05:14:33 +00:00
Chris Lattner
54d24025d6
filecheckize
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112695 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-01 05:10:14 +00:00
Chris Lattner
2ac6e2354a
licm is wasting time hoisting constant foldable operations,
...
instead of hoisting them, just fold them away. This occurs in the
testcase for PR8041, for example.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112669 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-31 23:00:16 +00:00
Owen Anderson
e1aa33f2a2
Merge 2010-08-31-InfiniteRecursion.ll into crash.ll.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112635 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-31 20:27:17 +00:00
Owen Anderson
b95df124b2
Add a test for the duplicated-conditional situation illutrated by PR5652.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112621 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-31 18:49:12 +00:00
Chris Lattner
0676984117
merge two tests.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112617 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-31 18:44:03 +00:00
Owen Anderson
047f4f5c91
Manually reduce this testcase.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112615 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-31 18:16:29 +00:00
Chris Lattner
f88776c363
merge two tests and convert to filecheck.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112613 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-31 18:05:08 +00:00
Owen Anderson
421cc4c999
Add a micro-test for the transforms I added to JumpThreading.
...
I have not been able to find a way to test each in isolation, for a few reasons:
1) The ability to look-through non-i1 BinaryOperator's requires the ability to look through non-constant
ICmps in order for it to ever trigger.
2) The ability to do LVI-powered PHI value determination only matters in cases that ProcessBranchOnPHI
can't handle. Since it already handles all the cases without other instructions in the def-use chain
between the PHI and the branch, it requires the ability to look through ICmps and/or BinaryOperators
as well.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112611 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-31 17:59:07 +00:00
Owen Anderson
8320006473
Rename test directory to reflect new pass name.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112592 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-31 07:50:31 +00:00
Owen Anderson
25e9405272
Rename ValuePropagation to a more descriptive CorrelatedValuePropagation.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112591 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-31 07:48:34 +00:00
Owen Anderson
cb21190cbd
More Chris-inspired JumpThreading fixes: use ConstantExpr to correctly constant-fold undef, and be more careful with its return value.
...
This actually exposed an infinite recursion bug in ComputeValueKnownInPredecessors which theoretically already existed (in JumpThreading's
handling of and/or of i1's), but never manifested before. This patch adds a tracking set to prevent this case.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112589 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-31 07:36:34 +00:00
Owen Anderson
c97fb52799
Remove r111665, which implemented store-narrowing in InstCombine. Chris discovered a miscompilation in it, and it's not easily
...
fixable at the optimizer level. I'll investigate reimplementing it in DAGCombine.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112575 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-31 04:41:06 +00:00
Owen Anderson
985185ea75
Combine these two tests, and make sure there's a newline at the end of the file.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112554 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-30 23:37:41 +00:00
Duncan Sands
cdd4f8c7cb
Correct bogus module triple specifications.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112469 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-30 10:48:29 +00:00
Chris Lattner
0de5cad74d
LICM does get dead instructions input to it. Instead of sinking them
...
out of loops, just delete them.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112451 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-29 18:22:25 +00:00
Chris Lattner
5f88af5376
remove the ABCD and SSI passes. They don't have any clients that
...
I'm aware of, aren't maintained, and LVI will be replacing their value.
nlewycky approved this on irc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112355 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-28 03:51:24 +00:00
Chris Lattner
7900779543
handle the constant case of vector insertion. For something
...
like this:
struct S { float A, B, C, D; };
struct S g;
struct S bar() {
struct S A = g;
++A.B;
A.A = 42;
return A;
}
we now generate:
_bar: ## @bar
## BB#0: ## %entry
movq _g@GOTPCREL(%rip), %rax
movss 12(%rax), %xmm0
pshufd $16, %xmm0, %xmm0
movss 4(%rax), %xmm2
movss 8(%rax), %xmm1
pshufd $16, %xmm1, %xmm1
unpcklps %xmm0, %xmm1
addss LCPI1_0(%rip), %xmm2
pshufd $16, %xmm2, %xmm2
movss LCPI1_1(%rip), %xmm0
pshufd $16, %xmm0, %xmm0
unpcklps %xmm2, %xmm0
ret
instead of:
_bar: ## @bar
## BB#0: ## %entry
movq _g@GOTPCREL(%rip), %rax
movss 12(%rax), %xmm0
pshufd $16, %xmm0, %xmm0
movss 4(%rax), %xmm2
movss 8(%rax), %xmm1
pshufd $16, %xmm1, %xmm1
unpcklps %xmm0, %xmm1
addss LCPI1_0(%rip), %xmm2
movd %xmm2, %eax
shlq $32, %rax
addq $1109917696, %rax ## imm = 0x42280000
movd %rax, %xmm0
ret
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112345 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-28 01:50:57 +00:00
Chris Lattner
3dd08734c1
optimize bitcasts from large integers to vector into vector
...
element insertion from the pieces that feed into the vector.
This handles a pattern that occurs frequently due to code
generated for the x86-64 abi. We now compile something like
this:
struct S { float A, B, C, D; };
struct S g;
struct S bar() {
struct S A = g;
++A.A;
++A.C;
return A;
}
into all nice vector operations:
_bar: ## @bar
## BB#0: ## %entry
movq _g@GOTPCREL(%rip), %rax
movss LCPI1_0(%rip), %xmm1
movss (%rax), %xmm0
addss %xmm1, %xmm0
pshufd $16, %xmm0, %xmm0
movss 4(%rax), %xmm2
movss 12(%rax), %xmm3
pshufd $16, %xmm2, %xmm2
unpcklps %xmm2, %xmm0
addss 8(%rax), %xmm1
pshufd $16, %xmm1, %xmm1
pshufd $16, %xmm3, %xmm2
unpcklps %xmm2, %xmm1
ret
instead of icky integer operations:
_bar: ## @bar
movq _g@GOTPCREL(%rip), %rax
movss LCPI1_0(%rip), %xmm1
movss (%rax), %xmm0
addss %xmm1, %xmm0
movd %xmm0, %ecx
movl 4(%rax), %edx
movl 12(%rax), %esi
shlq $32, %rdx
addq %rcx, %rdx
movd %rdx, %xmm0
addss 8(%rax), %xmm1
movd %xmm1, %eax
shlq $32, %rsi
addq %rax, %rsi
movd %rsi, %xmm1
ret
This resolves rdar://8360454
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112343 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-28 01:20:38 +00:00
Owen Anderson
a0b59f6bd2
Add a prototype of a new peephole optimizing pass that uses LazyValue info to simplify PHIs and select's.
...
This pass addresses the missed optimizations from PR2581 and PR4420.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112325 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-27 23:31:36 +00:00
Chris Lattner
11493aa471
tidy up test.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112321 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-27 23:15:21 +00:00
Chris Lattner
4ece577019
Enhance the shift propagator to handle the case when you have:
...
A = shl x, 42
...
B = lshr ..., 38
which can be transformed into:
A = shl x, 4
...
iff we can prove that the would-be-shifted-in bits
are already zero. This eliminates two shifts in the testcase
and allows eliminate of the whole i128 chain in the real example.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112314 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-27 22:53:44 +00:00
Chris Lattner
29cc0b3660
Implement a pretty general logical shift propagation
...
framework, which is good at ripping through bitfield
operations. This generalize a bunch of the existing
xforms that instcombine does, such as
(x << c) >> c -> and
to handle intermediate logical nodes. This is useful for
ripping up the "promote to large integer" code produced by
SRoA.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112304 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-27 22:24:38 +00:00
Chris Lattner
d07ad66791
merge and filecheckize test
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112289 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-27 20:44:45 +00:00
Chris Lattner
7673290a96
merge two tests
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112288 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-27 20:42:10 +00:00
Chris Lattner
f9d05ab007
teach the truncation optimization that an entire chain of
...
computation can be truncated if it is fed by a sext/zext that doesn't
have to be exactly equal to the truncation result type.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112285 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-27 20:32:06 +00:00
Chris Lattner
784f333aef
Add an instcombine to clean up a common pattern produced
...
by the SRoA "promote to large integer" code, eliminating
some type conversions like this:
%94 = zext i16 %93 to i32 ; <i32> [#uses=2]
%96 = lshr i32 %94, 8 ; <i32> [#uses=1]
%101 = trunc i32 %96 to i8 ; <i8> [#uses=1]
This also unblocks other xforms from happening, now clang is able to compile:
struct S { float A, B, C, D; };
float foo(struct S A) { return A.A + A.B+A.C+A.D; }
into:
_foo: ## @foo
## BB#0: ## %entry
pshufd $1, %xmm0, %xmm2
addss %xmm0, %xmm2
movdqa %xmm1, %xmm3
addss %xmm2, %xmm3
pshufd $1, %xmm1, %xmm0
addss %xmm3, %xmm0
ret
on x86-64, instead of:
_foo: ## @foo
## BB#0: ## %entry
movd %xmm0, %rax
shrq $32, %rax
movd %eax, %xmm2
addss %xmm0, %xmm2
movapd %xmm1, %xmm3
addss %xmm2, %xmm3
movd %xmm1, %rax
shrq $32, %rax
movd %eax, %xmm0
addss %xmm3, %xmm0
ret
This seems pretty close to optimal to me, at least without
using horizontal adds. This also triggers in lots of other
code, including SPEC.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112278 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-27 18:31:05 +00:00
Owen Anderson
660cab32fe
Use LVI to eliminate conditional branches where we've tested a related condition previously. Update tests for this change.
...
This fixes PR5652.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112270 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-27 17:12:29 +00:00
Chris Lattner
98b3d3793c
filecheckize
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112235 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-26 22:23:39 +00:00
Chris Lattner
681ccf40d7
rename test.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112234 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-26 22:20:47 +00:00
Chris Lattner
26dbe7ec18
optimize "integer extraction out of the middle of a vector" as produced
...
by SRoA. This is part of rdar://7892780, but needs another xform to
expose this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112232 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-26 22:14:59 +00:00
Chris Lattner
e5a1426174
optimize bitcast(trunc(bitcast(x))) where the result is a float and 'x'
...
is a vector to be a vector element extraction. This allows clang to
compile:
struct S { float A, B, C, D; };
float foo(struct S A) { return A.A + A.B+A.C+A.D; }
into:
_foo: ## @foo
## BB#0: ## %entry
movd %xmm0, %rax
shrq $32, %rax
movd %eax, %xmm2
addss %xmm0, %xmm2
movapd %xmm1, %xmm3
addss %xmm2, %xmm3
movd %xmm1, %rax
shrq $32, %rax
movd %eax, %xmm0
addss %xmm3, %xmm0
ret
instead of:
_foo: ## @foo
## BB#0: ## %entry
movd %xmm0, %rax
movd %eax, %xmm0
shrq $32, %rax
movd %eax, %xmm2
addss %xmm0, %xmm2
movd %xmm1, %rax
movd %eax, %xmm1
addss %xmm2, %xmm1
shrq $32, %rax
movd %eax, %xmm0
addss %xmm1, %xmm0
ret
... eliminating half of the horribleness.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112227 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-26 21:55:42 +00:00
Chris Lattner
a6140a1444
filecheckize
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112225 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-26 21:51:41 +00:00
Chris Lattner
5333459a1e
rename test
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112224 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-26 21:50:56 +00:00
Owen Anderson
62efd3b385
Make JumpThreading smart enough to properly thread StrSwitch when it's compiled with clang++.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112198 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-26 17:40:24 +00:00
Devang Patel
1955cf1950
DIGlobalVariable can be used to encode debug info for globals that are directly folded into a constant by FE.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112072 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-25 18:52:02 +00:00
Owen Anderson
6cd2075549
In the default address space, any GEP off of null results in a trap value if you try to load it. Thus,
...
any load in the default address space that completes implies that the base value that it GEP'd from
was not null.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112015 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-25 01:16:47 +00:00
Owen Anderson
a4cba04a03
Re-apply r111568 with a fix for the clang self-host.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111665 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-20 18:24:43 +00:00
Owen Anderson
7c73b8b180
Previous revert failed to remove this file.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111582 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-19 23:45:15 +00:00
Owen Anderson
45c3b65eb7
Revert r111568 to unbreak clang self-host.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111571 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-19 23:25:16 +00:00
Owen Anderson
9419cab4c3
When a set of bitmask operations, typically from a bitfield initialization, only modifies the low bytes of a value,
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we can narrow the store to only over-write the affected bytes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111568 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-19 22:15:40 +00:00
Kenneth Uildriks
6e97e1d4be
Fixed and reactivated a partial specialization test
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111516 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-19 12:42:38 +00:00
Chris Lattner
2fa7b48eb5
Fix PR7755: knowing something about an inval for a pred
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from the LHS should disable reconsidering that pred on the
RHS. However, knowing something about the pred on the RHS
shouldn't disable subsequent additions on the RHS from
happening.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111349 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-18 03:14:36 +00:00
Eric Christopher
68c23f8616
Temporarily revert r110987 as it's causing some miscompares in
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vector heavy code. I'll re-enable when we've tracked down the problem.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111318 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-17 22:55:27 +00:00
Dan Gohman
fc8042a122
When rotating loops, put the original header at the bottom of the
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loop, making the resulting loop significantly less ugly. Also, zap
its trivial PHI nodes, since it's easy.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111255 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-17 17:39:21 +00:00
Dan Gohman
7a4994356b
Instead, teach SimplifyCFG to trim non-address-taken blocks from
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indirectbr destination lists.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111122 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-16 14:41:14 +00:00
Dan Gohman
c2f40066bb
LoopSimplify shouldn't split loop backedges that use indirectbr. PR7867.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111061 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-14 00:43:09 +00:00
Dan Gohman
e2c6d131d1
Teach SimplifyCFG how to simplify indirectbr instructions.
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- Eliminate redundant successors.
- Convert an indirectbr with one successor into a direct branch.
Also, generalize SimplifyCFG to be able to be run on a function entry block.
It knows quite a few simplifications which are applicable to the entry
block, and it only needs a few checks to avoid trouble with the entry block.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111060 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-14 00:29:42 +00:00
Nate Begeman
7f1f4089a1
Reapply this transformation now that it is passing the external test which it previously failed.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110987 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-13 00:17:53 +00:00
Chris Lattner
1522ce9770
fix PR7876: If ipsccp decides that a function's address is taken
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before it rewrites the code, we need to use that in the post-rewrite pass.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110962 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-12 22:25:23 +00:00
Eric Christopher
7486278900
Temporarily revert 110737 and 110734, they were causing failures
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in an external testsuite.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110905 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-12 07:01:22 +00:00
Nate Begeman
e32ea923de
Add test for recent instcombine vector shuffle enhancement
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110737 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-10 21:58:00 +00:00
Eli Friedman
4fffb345ed
PR7853: fix a silly mistake introduced in r101899, and add a test to make sure
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it doesn't regress again.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110597 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-09 20:49:43 +00:00
Dan Gohman
a34c885d51
Move x86-specific tests out of test/Transforms/LoopStrengthReduce and
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into test/CodeGen/X86, so that they aren't run when the x86 target is
not enabled.
Fix uglygep.ll to not be x86-specific.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110343 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-05 17:04:15 +00:00
Dan Gohman
0fd353376b
Make instcombine set explicit alignments on load or store
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instructions with alignment 0, so that subsequent passes don't
need to bother checking the TargetData ABI size manually.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110128 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-03 18:20:32 +00:00
Peter Collingbourne
3bababf880
Add an atomic lowering pass
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110113 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-03 16:19:16 +00:00
Owen Anderson
61378363b7
Re-apply the infamous r108614, with a fix pointed out by Dirk Steinke.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110036 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-02 09:32:13 +00:00
Daniel Dunbar
10b173a1e7
Speculatively revert r108614, "Another attempt at getting the clang self-host to
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like my instcombine patch.", in an attempt to fix Clang i386 bootstrap.
- Also PR7719.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109953 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-31 19:51:11 +00:00
Owen Anderson
88dafec7f9
Fix a test with malformed IR. Not sure why this didn't fail before.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109422 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-26 18:44:56 +00:00
Dan Gohman
6ebfd72f37
Fix SCEVExpander::visitAddRecExpr so that it remembers the induction variable
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it inserted rather than using LoopInfo::getCanonicalInductionVariable to
rediscover it, since that doesn't work on non-canonical loops. This fixes
infinite recurrsion on such loops; PR7562.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109419 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-26 18:28:14 +00:00
Dan Gohman
38d49ad083
Avoid depending on LCSSA implicitly pulling in LoopSimplify.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109410 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-26 18:00:43 +00:00
Owen Anderson
aa52fd10ab
Testcase for r108687.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108689 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-19 08:14:26 +00:00
Owen Anderson
7e3012c345
Another attempt at getting the clang self-host to like my instcombine patch.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108614 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-17 06:56:35 +00:00
Nick Lewycky
394ce41b7f
Arrays and vectors with different numbers of elements are not equivalent.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108517 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-16 06:31:12 +00:00
Tobias Grosser
74c740052a
LoopSimplify does not update domfrontier correctly.
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This fixes PR7649.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108513 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-16 05:59:45 +00:00
Eric Christopher
de309a8b52
Also revert 108422, it's causing some test failures.
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Working on testcases for Owen.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108494 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-16 01:36:12 +00:00
Dan Gohman
2969016070
Fix this test.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108491 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-16 01:28:45 +00:00
Dan Gohman
bb5d92741b
Fix the order that SCEVExpander considers add operands in so that
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it doesn't miss an opportunity to form a GEP, regardless of the
relative loop depths of the operands. This fixes rdar://8197217.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108475 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-15 23:38:13 +00:00
Owen Anderson
96fe621e07
Reapply r108378, with bugfixes, testcase, and improved comment formatting.
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This now passes LIT, nighty test, and llvm-gcc bootstrap on my machine.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108422 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-15 15:00:23 +00:00
Chris Lattner
d2bfe54b0a
Fix PR7647, handling the case when 'To' ends up being
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mutated by recursive simplification. This also enhances
ReplaceAndSimplifyAllUses to actually do a real RAUW
at the end of it, which updates any value handles
pointing to "From" to start pointing to "To". This
seems useful for debug info and random other VH users.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108415 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-15 06:36:08 +00:00
Chris Lattner
07c9b64719
revert r108320, I see the failures now...
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108322 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-14 06:16:35 +00:00
Chris Lattner
7e185af930
reapply benjamin's instcombine patch, I don't see anything wrong with it and can't repro any problems with a manual self-host.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108320 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-14 05:59:13 +00:00
Duncan Sands
d0d3ccc827
Handle the case of a tail recursion in which the tail call is followed
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by a return that returns a constant, while elsewhere in the function
another return instruction returns a different constant. This is a
special case of accumulator recursion, so just generalize the existing
logic a bit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108241 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-13 15:41:41 +00:00
Benjamin Kramer
c9fe6374b7
Nope, still breaks the release selfhost bots :(
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108153 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-12 16:38:48 +00:00
Benjamin Kramer
8fd437c43f
Reapply the "or" half of r108136, which seems to be less problematic.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108152 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-12 16:15:48 +00:00
Benjamin Kramer
e2d07b5208
Revert r108141 again, sigh.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108148 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-12 14:42:04 +00:00
Benjamin Kramer
98a8206e58
Reapply 108136 with an ugly pasto fixed.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108141 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-12 13:44:00 +00:00
Benjamin Kramer
0cc4ed1ca5
Revert r108136 until I figure out why it broke selfhost.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108139 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-12 12:35:49 +00:00
Benjamin Kramer
4fc719e607
instcombine: fold (x & y) | (~x & z) and (x & y) ^ (~x & z) into ((y ^ z) & x) ^ z which is one instruction shorter. (PR6773)
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before:
%and = and i32 %y, %x
%neg = xor i32 %x, -1
%and4 = and i32 %z, %neg
%xor = xor i32 %and4, %and
after:
%xor1 = xor i32 %z, %y
%and2 = and i32 %xor1, %x
%xor = xor i32 %and2, %z
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108136 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-12 11:54:45 +00:00
Chris Lattner
dfd3626b47
fix PR7311 by avoiding breaking casts when a bitcast from scalar->vector
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is involved.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108117 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-12 01:19:22 +00:00
Chris Lattner
0a96144aac
if jump threading is able to infer interesting values on both
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the LHS and RHS of an and/or instruction, don't multiply add
known predecessor values. This fixes the crash on testcase
from PR7498
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108114 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-12 00:47:34 +00:00
Chris Lattner
eae2895120
fix PR7429, a crash turning a load from a string into a float.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108113 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-12 00:22:51 +00:00
Chris Lattner
ddef83536c
convert to filechecconvert to filecheckk
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108112 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-12 00:21:10 +00:00