| 65195411ccb18ea8327d3eabdfa980eaf535d929 |
|
28-May-2012 |
Benjamin Kramer <benny.kra@googlemail.com> |
PR12967: Don't crash when trying to fold a shift that's larger than the type's size.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157548 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 72847f3057a7d82be087d3aad7d13b7719409a32 |
|
23-Apr-2012 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Reapply r155136 after fixing PR12599.
Original commit message:
Defer some shl transforms to DAGCombine.
The shl instruction is used to represent multiplication by a constant
power of two as well as bitwise left shifts. Some InstCombine
transformations would turn an shl instruction into a bit mask operation,
making it difficult for later analysis passes to recognize the
constsnt multiplication.
Disable those shl transformations, deferring them to DAGCombine time.
An 'shl X, C' instruction is now treated mostly the same was as 'mul X, C'.
These transformations are deferred:
(X >>? C) << C --> X & (-1 << C) (When X >> C has multiple uses)
(X >>? C1) << C2 --> X << (C2-C1) & (-1 << C2) (When C2 > C1)
(X >>? C1) << C2 --> X >>? (C1-C2) & (-1 << C2) (When C1 > C2)
The corresponding exact transformations are preserved, just like
div-exact + mul:
(X >>?,exact C) << C --> X
(X >>?,exact C1) << C2 --> X << (C2-C1)
(X >>?,exact C1) << C2 --> X >>?,exact (C1-C2)
The disabled transformations could also prevent the instruction selector
from recognizing rotate patterns in hash functions and cryptographic
primitives. I have a test case for that, but it is too fragile.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155362 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| eece9dc81cedf0cda5c356c180f60d91c99920fc |
|
20-Apr-2012 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Revert r155136 "Defer some shl transforms to DAGCombine."
While the patch was perfect and defect free, it exposed a really nasty
bug in X86 SelectionDAG that caused an llc crash when compiling lencod.
I'll put the patch back in after fixing the SelectionDAG problem.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155181 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 0d5fcae6cd7b96a5a483d6179d2908517970169c |
|
19-Apr-2012 |
Jakob Stoklund Olesen <stoklund@2pi.dk> |
Defer some shl transforms to DAGCombine.
The shl instruction is used to represent multiplication by a constant
power of two as well as bitwise left shifts. Some InstCombine
transformations would turn an shl instruction into a bit mask operation,
making it difficult for later analysis passes to recognize the
constsnt multiplication.
Disable those shl transformations, deferring them to DAGCombine time.
An 'shl X, C' instruction is now treated mostly the same was as 'mul X, C'.
These transformations are deferred:
(X >>? C) << C --> X & (-1 << C) (When X >> C has multiple uses)
(X >>? C1) << C2 --> X << (C2-C1) & (-1 << C2) (When C2 > C1)
(X >>? C1) << C2 --> X >>? (C1-C2) & (-1 << C2) (When C1 > C2)
The corresponding exact transformations are preserved, just like
div-exact + mul:
(X >>?,exact C) << C --> X
(X >>?,exact C1) << C2 --> X << (C2-C1)
(X >>?,exact C1) << C2 --> X >>?,exact (C1-C2)
The disabled transformations could also prevent the instruction selector
from recognizing rotate patterns in hash functions and cryptographic
primitives. I have a test case for that, but it is too fragile.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155136 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 858143816d43e58b17bfd11cb1b57afbd7f0f893 |
|
07-Feb-2012 |
Craig Topper <craig.topper@gmail.com> |
Convert assert(0) to llvm_unreachable
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149967 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 234f8c9ef89b67475693b399f7d8ecb3fe0cbfb5 |
|
04-Jan-2012 |
Nick Lewycky <nicholas@mxc.ca> |
Remove pointless asserts.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147529 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 148fd55ef3b47e224539eac7342c936bbf138ed5 |
|
04-Jan-2012 |
Nick Lewycky <nicholas@mxc.ca> |
Teach instcombine all sorts of great stuff about shifts that have exact, nuw or
nsw bits on them.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147528 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 57ed0948b87206beadce58c406f95dda345fe62c |
|
31-Dec-2011 |
Nick Lewycky <nicholas@mxc.ca> |
Make use of the exact bit when optimizing '(X >>exact 3) << 1' to eliminate the
'and' that would zero out the trailing bits, and to produce an exact shift
ourselves.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147391 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| aab8e28d5e470711d80276bbf717408c3ab966fd |
|
02-Dec-2011 |
Chad Rosier <mcrosier@apple.com> |
Fix a few more places where TargetData/TargetLibraryInfo is not being passed.
Add FIXMEs to places that are non-trivial to fix.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145661 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| ef715972423a57febb7aa9b056d9bf6320e74817 |
|
29-Jul-2011 |
Eli Friedman <eli.friedman@gmail.com> |
Make sure to correctly clear the exact/nuw/nsw flags off of shifts when they are combined together. <rdar://problem/9859829>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136435 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 747032522f9f3b2d9bae71aa303c1a0fd953eee9 |
|
20-Jul-2011 |
Eli Friedman <eli.friedman@gmail.com> |
Clean up includes of llvm/Analysis/ConstantFolding.h so it's included where it's used and not included where it isn't.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135628 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| db125cfaf57cc83e7dd7453de2d509bc8efd0e5e |
|
18-Jul-2011 |
Chris Lattner <sabre@nondot.org> |
land David Blaikie's patch to de-constify Type, with a few tweaks.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135375 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 322480610939bca07506750571cb60f1497ec9a4 |
|
29-Apr-2011 |
Benjamin Kramer <benny.kra@googlemail.com> |
Balance parentheses.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130489 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| c2e31c1461f96e3d8325e58ef396a865adf7b302 |
|
29-Apr-2011 |
Benjamin Kramer <benny.kra@googlemail.com> |
InstCombine: turn (C1 << A) << C2) into (C1 << C2) << A)
Fixes PR9809.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130485 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 7a6aa1a3919af8ece92702c36dc552d81be9151a |
|
10-Feb-2011 |
Chris Lattner <sabre@nondot.org> |
Enhance a bunch of transformations in instcombine to start generating
exact/nsw/nuw shifts and have instcombine infer them when it can prove
that the relevant properties are true for a given shift without them.
Also, a variety of refactoring to use the new patternmatch logic thrown
in for good luck. I believe that this takes care of a bunch of related
code quality issues attached to PR8862.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125267 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 81a0dc911586c77421c2255aa417dc9b350b9e20 |
|
09-Feb-2011 |
Chris Lattner <sabre@nondot.org> |
Teach instsimplify some tricks about exact/nuw/nsw shifts.
improve interfaces to instsimplify to take this info.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125196 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 584520e8e2c1f8cc04bc8dd4dc4ea6c390627317 |
|
23-Jan-2011 |
Ted Kremenek <kremenek@apple.com> |
Null initialize a few variables flagged by
clang's -Wuninitialized-experimental warning.
While these don't look like real bugs, clang's
-Wuninitialized-experimental analysis is stricter
than GCC's, and these fixes have the benefit
of being general nice cleanups.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124073 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| c43cee3fbb3098f0647e50dd2c13bc55b027a228 |
|
14-Jan-2011 |
Duncan Sands <baldrick@free.fr> |
Move some shift transforms out of instcombine and into InstructionSimplify.
While there, I noticed that the transform "undef >>a X -> undef" was wrong.
For example if X is 2 then the top two bits must be equal, so the result can
not be anything. I fixed this in the constant folder as well. Also, I made
the transform for "X << undef" stronger: it now folds to undef always, even
though X might be zero. This is in accordance with the LangRef, but I must
admit that it is fairly aggressive. Also, I added "i32 X << 32 -> undef"
following the LangRef and the constant folder, likewise fairly aggressive.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123417 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| ec3953ff95c6106185fc6509175b86cbdf3958f6 |
|
24-Dec-2010 |
Owen Anderson <resistor@mac.com> |
When determining if we can fold (x >> C1) << C2, the bits that we need to verify are zero
are not the low bits of x, but the bits that WILL be the low bits after the operation completes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122529 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| d8e0c0438ab1ec86b2bd42da7a439caa7f0a61eb |
|
09-Dec-2010 |
Dan Gohman <gohman@apple.com> |
Really check that the bits that will become zero are actually already zero
before eliminating the operation that zeros them. This fixes rdar://8739316.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121353 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| c21a821e9f044004bc504dd7bfdfaecb9d4af16b |
|
23-Nov-2010 |
Benjamin Kramer <benny.kra@googlemail.com> |
The srem -> urem transform is not safe for any divisor that's not a power of two.
E.g. -5 % 5 is 0 with srem and 1 with urem.
Also addresses Frits van Bommel's comments.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120049 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| b70ebd2aa3b6f4546d4734e7bcdbed2017036b4d |
|
23-Nov-2010 |
Benjamin Kramer <benny.kra@googlemail.com> |
InstCombine: Reduce "X shift (A srem B)" to "X shift (A urem B)" iff B is positive.
This allows to transform the rem in "1 << ((int)x % 8);" to an and.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120028 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 201ab3acff18c0470950d43495419185e8a7afd3 |
|
10-Nov-2010 |
Dale Johannesen <dalej@apple.com> |
When checking that the necessary bits are zero in
order to reduce ((x<<30)>>24) to x<<6, check the
correct bits. PR 8547.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118665 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 648b20d5dbc54391f0d38c6ff16cf304bf3cb297 |
|
01-Nov-2010 |
Owen Anderson <resistor@mac.com> |
When folding away a (shl (shr)) pair, we need to check that the bits that will BECOME the low
bits are zero, not that the current low bits are zero. Fixes <rdar://problem/8606771>.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117953 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 3dd08734c1812e47ae5f6aceba15f28865f75943 |
|
28-Aug-2010 |
Chris Lattner <sabre@nondot.org> |
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
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 4ece577019705e0a4d7f80f8e8fc1f3cfde276ee |
|
28-Aug-2010 |
Chris Lattner <sabre@nondot.org> |
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
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 29cc0b3660dc75df06679c4c49cf91ffe24615ff |
|
28-Aug-2010 |
Chris Lattner <sabre@nondot.org> |
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
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 2d0822a937a3b4d1c5096471a2af02ead2090b6e |
|
27-Aug-2010 |
Chris Lattner <sabre@nondot.org> |
remove some special shift cases that have been subsumed into the
more general simplify demanded bits logic.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112291 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| de9f5452d3ae894bb7fdd455cec5af50e2560aa5 |
|
24-Jun-2010 |
Gabor Greif <ggreif@gmail.com> |
use ArgOperand API
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106707 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 551754c4958086cc6910da7c950f2875e212f5cf |
|
17-Apr-2010 |
Eric Christopher <echristo@apple.com> |
Revert 101465, it broke internal OpenGL testing.
Probably the best way to know that all getOperand() calls have been handled
is to replace that API instead of updating.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101579 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 4ec2258ffb495d7ce00177e447740ef1123a27db |
|
16-Apr-2010 |
Gabor Greif <ggreif@gmail.com> |
reapply r101434
with a fix for self-hosting
rotate CallInst operands, i.e. move callee to the back
of the operand array
the motivation for this patch are laid out in my mail to llvm-commits:
more efficient access to operands and callee, faster callgraph-construction,
smaller compiler binary
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101465 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 607a7ab3da72a2eb53553a520507cbb8068dd1d8 |
|
16-Apr-2010 |
Gabor Greif <ggreif@gmail.com> |
back out r101423 and r101397, they break llvm-gcc self-host on darwin10
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101434 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 2ff961f66816daab8bbc58a19025161d969821c2 |
|
15-Apr-2010 |
Gabor Greif <ggreif@gmail.com> |
reapply r101364, which has been backed out in r101368
with a fix
rotate CallInst operands, i.e. move callee to the back
of the operand array
the motivation for this patch are laid out in my mail to llvm-commits:
more efficient access to operands and callee, faster callgraph-construction,
smaller compiler binary
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101397 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 9ee17208115482441953127615231c59a2f4d052 |
|
15-Apr-2010 |
Gabor Greif <ggreif@gmail.com> |
back out r101364, as it trips the linux nightlybot on some clang C++ tests
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101368 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 165dac08d1bb8428b32a5f39cdd3dbee2888987f |
|
15-Apr-2010 |
Gabor Greif <ggreif@gmail.com> |
rotate CallInst operands, i.e. move callee to the back
of the operand array
the motivation for this patch are laid out in my mail to llvm-commits:
more efficient access to operands and callee, faster callgraph-construction,
smaller compiler binary
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101364 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| f7d0d163c5962a51cf9eb32db093b5d1fd8114fa |
|
24-Jan-2010 |
Chris Lattner <sabre@nondot.org> |
fix a potential overflow issue Eli pointed out.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94336 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| 818ff34bc0841edda10951b7b043076b6e7159ef |
|
23-Jan-2010 |
Chris Lattner <sabre@nondot.org> |
implement a simple instcombine xform that has been in the
readme forever.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94318 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| cd5adbbc0cef6ddf20c476ad2049104426198e15 |
|
18-Jan-2010 |
Chris Lattner <sabre@nondot.org> |
my instcombine transformations to make extension elimination more
aggressive changed the canonical form from sext(trunc(x)) to ashr(lshr(x)),
make sure to transform a couple more things into that canonical form,
and catch a case where we missed turning zext/shl/ashr into a single sext.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93787 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
|
| f4fb91181cbd3f63d487a2519c7f7be9d5e51709 |
|
10-Jan-2010 |
Chris Lattner <sabre@nondot.org> |
change the preferred canonical form for a sign extension to be
lshr+ashr instead of trunc+sext. We want to avoid type
conversions whenever possible, it is easier to codegen expressions
without truncates and extensions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93107 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
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| abff82d99e8251774dfdc31f6c9ca0e10a146f5a |
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10-Jan-2010 |
Chris Lattner <sabre@nondot.org> |
fix indentation of switch statements, no functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93106 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
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| a85732fa3bf17dd48b897f76533142ac0f2ec140 |
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08-Jan-2010 |
Chris Lattner <sabre@nondot.org> |
teach instcombine to delete sign extending shift pairs (sra(shl X, C), C) when
the input is already sign extended.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93019 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
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| 9cdd5f3fe3e857505012554d678fcd80f3f74617 |
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05-Jan-2010 |
Chris Lattner <sabre@nondot.org> |
split instcombine of shifts out to its own file.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92709 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
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