Chris Lattner
8cfe6335e4
Fix PR867 (and maybe 868) and testcsae:
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Transforms/SimplifyCFG/2006-08-03-Crash.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29515 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-03 21:40:24 +00:00
Chris Lattner
7e79b3898d
Changes:
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1. Update an obsolete comment.
2. Make the sorting by base an explicit (though still N^2) step, so
that the code is more clear on what it is doing.
3. Partition uses so that uses inside the loop are handled before uses
outside the loop.
Note that none of these changes currently changes the code inserted by LSR,
but they are a stepping stone to getting there.
This code is the result of some crazy pair programming with Nate. :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29493 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-03 06:34:50 +00:00
Chris Lattner
f9ba401bf5
Add special check to avoid isLoop call. Simple, but doesn't seem to speed
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up lcssa much in practice.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29465 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-02 00:16:47 +00:00
Chris Lattner
d41ae8bc0c
Replace the SSA update code in LCSSA with a bottom-up approach instead of a top
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down approach, inspired by discussions with Tanya.
This approach is significantly faster, because it does not need dominator
frontiers and it does not insert extraneous unused PHI nodes. For example, on
252.eon, in a release-asserts build, this speeds up LCSSA (which is the slowest
pass in gccas) from 9.14s to 0.74s on my G5. This code is also slightly smaller
and significantly simpler than the old code.
Amusingly, in a normal Release build (which includes the
"assert(L->isLCSSAForm());" assertion), asserting that the result of LCSSA
is in LCSSA form is actually slower than the LCSSA transformation pass
itself on 252.eon. I will see if Loop::isLCSSAForm can be sped up next.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29463 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-02 00:06:09 +00:00
Chris Lattner
ec3c411de8
Minor comment tweaks
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29226 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-20 19:06:16 +00:00
Devang Patel
d828a4b285
Make it fit into 80 cols.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29223 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-20 18:03:39 +00:00
Devang Patel
753d94a1c8
Add new constructor to accept vector of exported names while creating
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InternalizePass.
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2006-07-20 17:48:05 +00:00
Owen Anderson
10d9d9f27c
Add an assertion.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29199 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-19 05:48:45 +00:00
Owen Anderson
2698a08c23
Make LoopUnroll not die on LCSSA Phis. This makes lencod work again.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29198 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-19 05:45:14 +00:00
Owen Anderson
db5b9cfd86
Fix a error that hadn't yet cause any problems, but I'm sure it would have
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somewhere down the road.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29197 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-19 03:51:48 +00:00
Chris Lattner
21ba23d0d8
silence warnings in a release build
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29189 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-18 21:48:57 +00:00
Evan Cheng
31e773147b
Only reuse a previous IV if it would not require a type conversion.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29186 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-18 19:07:58 +00:00
Chris Lattner
27d672136a
eliminate some ugly code, using ConstantExpr::getWithOperands instead.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29149 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-14 22:21:31 +00:00
Owen Anderson
c1be492f94
Hopefully the final attempt at making IndVars preserve LCSSA.
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This should fix PR 831.
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2006-07-14 18:49:15 +00:00
Chris Lattner
262041892d
Revert this patch temporarily until PR831 is fixed.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29134 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-13 19:05:20 +00:00
Chris Lattner
981418bf15
Handle instructions in the map, but that map to a null pointer.
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This unbreaks smg2000.
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2006-07-12 21:37:11 +00:00
Owen Anderson
bcfb913df0
IndVars now (correctly) preserves LCSSA form.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29126 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-12 21:29:14 +00:00
Chris Lattner
1bb3a40257
In addition to deleting calls, the inliner can constant fold them as well.
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Handle this case, which doesn't require a new callgraph edge. This fixes
a crash compiling MallocBench/gs.
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2006-07-12 18:37:18 +00:00
Chris Lattner
d85340f4ec
Change the callgraph representation to store the callsite along with the
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target CG node. This allows the inliner to properly update the callgraph
when using the pruning inliner. The pruning inliner may not copy over all
call sites from a callee to a caller, so the edges corresponding to those
call sites should not be copied over either.
This fixes PR827 and Transforms/Inline/2006-07-12-InlinePruneCGUpdate.ll
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2006-07-12 18:29:36 +00:00
Chris Lattner
ed36b2f1c2
Silence a warning produced in assertions-disabled mode
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29108 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-11 18:31:26 +00:00
Owen Anderson
4a8aadd1f5
Revert my indvars changes because they were breaking things. Unfortunately this
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didn't start showing up until after the recent instcombine fixes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29102 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-11 07:25:33 +00:00
Owen Anderson
b64ab8769e
Add a comment, and fix a typo that broke the build.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29094 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-10 22:15:25 +00:00
Owen Anderson
7e05714a10
Don't indent the entire function.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29093 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-10 22:03:18 +00:00
Chris Lattner
6423d4c64a
Recognize 16-bit bswaps by relaxing overconstrained pattern.
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This implements Transforms/InstCombine/bswap.ll:test[34].
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29087 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-10 20:25:24 +00:00
Owen Anderson
d1b78a12ef
Make instcombine not remove Phi nodes when LCSSA is live.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29083 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-10 19:03:49 +00:00
Owen Anderson
f8dad7a926
Fix typo in the comment.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29078 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-09 21:35:40 +00:00
Owen Anderson
e4e1ecd37c
Add a fix for an issue where LCSSA would fail to insert undef's in some corner
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cases. Ideally, this issue will go away in the future as LCSSA gets smarter
about which Phi nodes it inserts.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29076 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-09 08:14:06 +00:00
Chris Lattner
7cd580f0b7
Fix PR820 and Transforms/GlobalOpt/2006-07-07-InlineAsmCrash.ll
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29071 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-07 21:37:01 +00:00
Chris Lattner
9525528a7d
Use hidden visibility to make symbols in an anonymous namespace get
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dropped. This shrinks libllvmgcc.dylib another 67K
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28975 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-28 23:17:24 +00:00
Chris Lattner
f4b546110c
Shrink libllvmgcc.dylib by another 23K
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28972 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-28 22:08:15 +00:00
Owen Anderson
372994be25
Switch to a very conservative heuristic for determining when loop-unswitching
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will be profitable. This is mainly to remove some cases where excessive
unswitching would result in long compile times and/or huge generated code.
Once someone comes up with a better heuristic that avoids these cases, this
should be switched out.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28962 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-28 17:47:50 +00:00
Chris Lattner
d228018396
Fix Transforms/InstCombine/2006-06-28-infloop.ll
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28961 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-28 17:34:50 +00:00
Chris Lattner
daa2bf9a19
Don't unswitch really large loops even if they are mostly filled with empty
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blocks.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28959 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-28 16:38:55 +00:00
Andrew Lenharth
b8e604c29a
Catch more function pointer casting problems
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Remove the Function pointer cast in these calls, converting it to
a cast of argument.
%tmp60 = tail call int cast (int (ulong)* %str to int (int)*)( int 10 )
%tmp60 = tail call int cast (int (ulong)* %str to int (int)*)( uint %tmp51 )
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28953 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-28 01:01:52 +00:00
Owen Anderson
bef8508737
Fix for 2006-06-27-DeadSwitchCase.ll
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Be more careful when updating Phi nodes after eliminating dead switch cases. Fix
proposed by Chris.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28947 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-27 22:26:09 +00:00
Chris Lattner
92044ce4e9
Fix Transforms/DeadArgElim/2006-06-27-struct-ret.ll. -deadargelim should not
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remove the struct return argument of a csret function, even if it is obviously
dead.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28943 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-27 21:05:04 +00:00
Owen Anderson
f9b238e93d
De-pessimize the handling of LCSSA Phi nodes in IndVarSimplify. Hopefully this
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will make Shootout-C/nestedloop faster.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28924 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-27 02:17:08 +00:00
Chris Lattner
3c80a51cfd
random code cleanups, no functionality change
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28914 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-26 19:10:05 +00:00
Owen Anderson
2b67f07d2b
Make LoopUnswitch able to unswitch loops with live-out values by taking advantage
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of LCSSA. This results several times the number of unswitchings occurring on
tests such and timberwolfmc, unix-tbl, and ldecod.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28912 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-26 07:44:36 +00:00
Chris Lattner
eb83f4e6cd
Fix IndVarsSimplify/2006-06-16-Indvar-LCSSA-Crash.ll, a case where a
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"LCSSA" phi node causes indvars to break dominance properties. This fixes
causes indvars to avoid inserting aggressive code in this case, instead
indvars should be fixed to be more aggressive in the face of lcssa phi's.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28850 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-17 01:02:31 +00:00
Evan Cheng
fb9d0dce97
Add missing casts. This fixed some regressions.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28834 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-16 18:37:15 +00:00
Evan Cheng
21abac2757
More libcall transformations:
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printf("%s\n", str) -> puts(str)
printf("%c", c) -> putchar(c)
Also fixed fprintf(file, "%c", c) -> fputc(c, file)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28815 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-16 08:36:35 +00:00
Evan Cheng
952895243e
Simplify fprintf(file, "%s", str) to fputs(str, file).
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28814 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-16 04:52:30 +00:00
Chris Lattner
afe91a5f26
Implement Transforms/InstCombine/bswap.ll, turning common shift/and/or bswap
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idioms into bswap intrinsics.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28803 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-15 19:07:26 +00:00
Chris Lattner
f7a1212850
Fix Transforms/LoopUnswitch/2006-06-13-SingleEntryPHI.ll, a loop unswitch
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bug exposed by the recent lcssa work.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28779 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-14 04:46:17 +00:00
Chris Lattner
13a68e4257
Use the PotDoms map to memoize 'dominating value' lookup. With this patch,
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LCSSA is still the slowest pass when gccas'ing 252.eon, but now it only takes
39s instead of 289s. :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28776 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-14 01:13:57 +00:00
Owen Anderson
8b92d0cae1
Fix another instance where PHI nodes need special treatment.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28774 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-13 20:50:09 +00:00
Owen Anderson
7be3f1e078
Fix a bug that was causing major slowdowns in povray. This was due to LCSSA
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not handling PHI nodes correctly when determining if a value was live-out.
This patch reduces the number of detected live-out variables in the testcase
from 6565 to 485.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28771 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-13 19:37:18 +00:00
Owen Anderson
6edf399bb4
Reapply my 6/9 changes. The bug Evan saw no longer occurs.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28759 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-12 21:49:21 +00:00
Chris Lattner
7f2e1dd5d4
Fix an infinite loop on Transforms/SimplifyCFG/2006-06-12-InfLoop.ll
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28758 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-12 20:18:01 +00:00
Owen Anderson
3d2aa47bd3
Fix for 2006-06-26-MultipleExitsSingleBlock.
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If a single exit block has multiple predecessors within the loop, it will
appear in the exit blocks list more than once. LCSSA needs to take that into
account so that it doesn't double process that exit block.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28750 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-12 07:10:16 +00:00
Owen Anderson
c2cc15cf9d
Re-commit the safe parts of my 6/9 patch. Still working on fixing the unsafe parts.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28748 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-11 19:22:28 +00:00
Evan Cheng
b9b2b309d3
Back out Owen's 6/9 changes. They broke MultiSource/Benchmarks/Prolangs-C/bison (and perhaps others).
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28747 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-11 09:32:57 +00:00
Owen Anderson
fcaf345c88
Add LCSSA as a requirement for LoopUnswitch, and assert that LoopUnswitch preserves
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LCSSA.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28739 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-09 18:40:32 +00:00
Owen Anderson
f25c19c6b5
Make Loop able to verify that it is in LCSSA-form, and have the LCSSA pass assert
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on this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28738 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-09 18:33:30 +00:00
Evan Cheng
86c75d3113
RewriteExpr, either the new PHI node of induction variable or the
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post-increment value, should be first cast to the appropriated type (to the
type of the common expr). Otherwise, the rewrite of a use based on (common +
iv) may end up with an incorrect type.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28735 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-09 00:12:42 +00:00
Owen Anderson
a452932171
Update some comments, and expose LCSSAID in preparation for having other passes
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require LCSSA.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28734 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-08 20:02:53 +00:00
Reid Spencer
6296b3cac5
Fix a spello in a comment.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28714 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-07 21:24:10 +00:00
Chris Lattner
18a4af2ba6
Fix a bug in a recent patch. This fixes UnitTests/Vector/Altivec/casts.c on
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PPC/altivec
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2006-06-06 22:26:02 +00:00
Owen Anderson
e9d93d5d70
Fix some formatting, and use inLoop() when appropriate.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28694 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-06 04:36:36 +00:00
Owen Anderson
92deacf2f7
Stop a memory leak, and update some comments.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28693 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-06 04:28:30 +00:00
Owen Anderson
c14c1d472a
Some more clean-up, and squash an IDF-Phi related bug.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28680 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-04 00:55:19 +00:00
Owen Anderson
9e1c1ddd4b
Various clean-ups suggested by Chris.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28678 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-04 00:02:23 +00:00
Owen Anderson
30019c88f4
Fix a bug in Phi-noded insertion. Also, update some comments to reflect what's
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actually going on.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28677 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-03 23:22:50 +00:00
Chris Lattner
0c1262c9f9
Remove unneeded hook. Patch by Anton K. Thanks!
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28664 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-02 19:11:46 +00:00
Chris Lattner
191b0ba97e
Force anything that #includes llvm/Transforms/Utils/UnifyFunctionExitNodes.h
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to link in the implementation. Thanks to Anton Korobeynikov for figuring out
what was going on here.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28660 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-02 18:40:06 +00:00
Chris Lattner
ecf626fedf
Remove dead #include
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28642 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-01 20:02:28 +00:00
Chris Lattner
35033efd08
Make the "pruning cloner" smarter. As it propagates constants through the
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code (while cloning) it often gets the branch/switch instructions. Since it
knows that edges of the CFG are dead, it need not clone (or even look) at
the obviously dead blocks. This should speed up the inliner substantially on
code where there are lots of inlinable calls to functions with constant
arguments. On C++ code in particular, this kicks in.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28641 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-01 19:19:23 +00:00
Chris Lattner
5180b29cb0
Silence a -pedantic warning.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28632 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-01 17:16:21 +00:00
Owen Anderson
ff99366919
Remove a FIXME that was fixed with my last patch.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28619 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-01 06:07:40 +00:00
Owen Anderson
2824da4738
More cleanups. Also, add a special case for updating PHI nodes, and
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reimplement getValueDominatingFunction to walk the DominanceTree rather than
just searching blindly.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28618 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-01 06:05:47 +00:00
Chris Lattner
13d4ab4009
Swap the order of operands created here. For +&|^, the order doesn't matter,
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but for sub, it really does! Fix fixes a miscompilation of fibheap_cut in
llvmgcc4.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28600 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-31 21:14:00 +00:00
Owen Anderson
408a4061d8
Extract a huge loop into a helper method. Fix a few iterator-invalidation bugs.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28599 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-31 20:55:06 +00:00
Owen Anderson
00ea74c27e
Add Use replacement. Assuming there is nothing horribly wrong with this, LCSSA
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is now theoretically feature-complete. It has not, however, been thoroughly
test, and is still considered experimental.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28529 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-29 01:00:00 +00:00
Owen Anderson
bd82277cbb
Major think-o. Iterate over all live out-of-loop values, and perform the
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other calculations on each individually, rather than trying to delay it and do
them all at the end.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28527 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-28 19:33:28 +00:00
Owen Anderson
2f21e07915
Make LCSSA insert proper Phi nodes throughout the rest of the CFG by computing
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the iterated Dominance Frontier of the loop-closure Phi's. This is the
second phase of the LCSSA pass. The third phase (coming soon) will be to
update all uses of loop variables to use the loop-closure Phi's instead.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28524 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-27 18:47:11 +00:00
Chris Lattner
8d8d6530b1
Fix some regression from the inliner patch I committed last night. This fixes
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ldecod, lencod, and SPASS.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28523 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-27 17:28:13 +00:00
Chris Lattner
5b5bc3032f
Switch the inliner over to using CloneAndPruneFunctionInto. This effectively
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makes it so that it constant folds instructions on the fly. This is good
for several reasons:
0. Many instructions are constant foldable after inlining, particularly if
inlining a call with constant arguments.
1. Without this, the inliner has to allocate memory for all of the instructions
that can be constant folded, then a subsequent pass has to delete them. This
gets the job done without this extra work.
2. This makes the inliner *pass* a bit more aggressive: in particular, it
partially solves a phase order issue where the inliner would inline lots
of code that folds away to nothing, but think that the resultant function
is big because of this code that will be gone. Now the code never exists.
This is the first part of a 2-step process. The second part will be smart
enough to see when this implicit constant folding propagates a constant into
a branch or switch instruction, making CFG edges dead.
This implements Transforms/Inline/inline_constprop.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28521 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-27 01:28:04 +00:00
Chris Lattner
83f03bfc3f
Implement a new method, CloneAndPruneFunctionInto, as documented.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28519 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-27 01:22:24 +00:00
Chris Lattner
4b30fcb5f5
Refactor some code to expose an interface to constant fold and instruction given it's opcode, typeand operands.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28517 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-27 01:18:04 +00:00
Owen Anderson
a90b2c7240
A few small clean-ups, and the addition of an LCSSA statistic.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28512 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-27 00:31:37 +00:00
Owen Anderson
fc3a3bc64b
Fix a copy-and-paste-o that would break some compilers.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28507 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-26 21:19:17 +00:00
Owen Anderson
2480737211
Clean up and refactor LCSSA a bunch. It should also run faster now, though
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there's still a lot of work to be done on it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28506 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-26 21:11:53 +00:00
Chris Lattner
b4db97ffa7
Implement Transforms/InstCombine/store.ll:test2.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28503 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-26 19:19:20 +00:00
Owen Anderson
11f510b577
Skeletal LCSSA pass. This is currently non-functional. Expect functionality
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and documentation updates soo.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28495 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-26 13:58:26 +00:00
Chris Lattner
7b2e2792d6
Transform things like (splat(splat)) -> splat
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28490 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-26 00:29:06 +00:00
Chris Lattner
863bcff183
Introduce a helper function that simplifies interpretation of shuffle masks.
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No functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28489 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-25 23:48:38 +00:00
Chris Lattner
01575b7315
Turn (cast (shuffle (cast)) -> shuffle (cast) if it reduces the # casts in
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the program. This exposes more opportunities for the instcombiner, and implements
vec_shuffle.ll:test6
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28487 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-25 23:24:33 +00:00
Chris Lattner
73fa49d697
extract element from a shuffle vector can be trivially turned into an
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extractelement from the SV's source. This implement vec_shuffle.ll:test[45]
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28485 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-25 22:53:38 +00:00
Chris Lattner
99f2af2dee
Revert a patch that is unsafe, due to out of range array accesses in inner
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array scopes possibly accessing valid memory in outer subscripts.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28478 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-25 21:25:12 +00:00
Chris Lattner
a04c0c417b
Patch for a new instcombine xform, patch contributed by Nick Lewycky!
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This implements Transforms/InstCombine/2006-05-10-InvalidIndexUndef.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28450 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-24 17:34:30 +00:00
Chris Lattner
d74ea2bbd8
Patches to make the LLVM sources more -pedantic clean. Patch provided
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by Anton Korobeynikov! This is a step towards closing PR786.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28447 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-24 17:04:05 +00:00
Chris Lattner
01859e8853
Silence a bogus gcc warning
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28422 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-20 23:14:03 +00:00
Reid Spencer
bc2eba1ca2
Fix a doxygen problem and break lines at 80 columns
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28395 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-19 19:09:46 +00:00
Chris Lattner
ed96fe8c79
Declare that lowerinvoke doesn't interact with other lowering passes.
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Patch written by Domagoj Babic!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28367 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-17 21:05:27 +00:00
Chris Lattner
782e60150e
Add a CloneModule call that exposes the mapping of values from the old module
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to the new module. Patch provided by Nick Lewycky!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28349 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-17 18:05:35 +00:00
Chris Lattner
a0fcc3ee3f
remove some dead code identified by coverity
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28289 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-14 18:45:44 +00:00
Chris Lattner
36a169e1a3
remove dead variables
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28286 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-14 18:33:57 +00:00
Evan Cheng
3e246dd084
Backing out last check-in for now. It's causing an infinite loop gccas lencode.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28284 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-14 06:46:03 +00:00
Chris Lattner
033aaaf451
Add/Sub/Mul are safe to promote here as well. Incrementing a single-bit
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bitfield now gives this code:
_plus:
lwz r2, 0(r3)
rlwimi r2, r2, 0, 1, 31
xoris r2, r2, 32768
stw r2, 0(r3)
blr
instead of this:
_plus:
lwz r2, 0(r3)
srwi r4, r2, 31
slwi r4, r4, 31
addis r4, r4, -32768
rlwimi r2, r4, 0, 0, 0
stw r2, 0(r3)
blr
this can obviously still be improved.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28275 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-13 02:16:08 +00:00
Chris Lattner
70074e00a2
Implement simple promotion for cast elimination in instcombine. This is
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currently very limited, but can be extended in the future. For example,
we now compile:
uint %test30(uint %c1) {
%c2 = cast uint %c1 to ubyte
%c3 = xor ubyte %c2, 1
%c4 = cast ubyte %c3 to uint
ret uint %c4
}
to:
_xor:
movzbl 4(%esp), %eax
xorl $1, %eax
ret
instead of:
_xor:
movb $1, %al
xorb 4(%esp), %al
movzbl %al, %eax
ret
More impressively, we now compile:
struct B { unsigned bit : 1; };
void xor(struct B *b) { b->bit = b->bit ^ 1; }
To (X86/PPC):
_xor:
movl 4(%esp), %eax
xorl $-2147483648, (%eax)
ret
_xor:
lwz r2, 0(r3)
xoris r2, r2, 32768
stw r2, 0(r3)
blr
instead of (X86/PPC):
_xor:
movl 4(%esp), %eax
movl (%eax), %ecx
movl %ecx, %edx
shrl $31, %edx
# TRUNCATE movb %dl, %dl
xorb $1, %dl
movzbl %dl, %edx
andl $2147483647, %ecx
shll $31, %edx
orl %ecx, %edx
movl %edx, (%eax)
ret
_xor:
lwz r2, 0(r3)
srwi r4, r2, 31
xori r4, r4, 1
rlwimi r2, r4, 31, 0, 0
stw r2, 0(r3)
blr
This implements InstCombine/cast.ll:test30.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28273 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-13 02:06:03 +00:00
Chris Lattner
2144c25364
Remove some dead variables.
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Fix a nasty bug in the memcmp optimizer where we used the wrong variable!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28269 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-12 23:35:26 +00:00
Chris Lattner
a87e9cd069
Remove dead stuff
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28268 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-12 23:32:01 +00:00
Chris Lattner
8c8c66a8cd
Refactor some code, making it simpler.
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When doing the initial pass of constant folding, if we get a constantexpr,
simplify the constant expr like we would do if the constant is folded in the
normal loop.
This fixes the missed-optimization regression in
Transforms/InstCombine/getelementptr.ll last night.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28224 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-11 17:11:52 +00:00
Chris Lattner
f4f5a77fdc
Two changes:
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1. Implement InstCombine/deadcode.ll by not adding instructions in unreachable
blocks (due to constants in conditional branches/switches) to the worklist.
This causes them to be deleted before instcombine starts up, leading to
better optimization.
2. In the prepass over instructions, do trivial constprop/dce as we go. This
has the effect of improving the effectiveness of #1 . In addition, it
*significantly* speeds up instcombine on test cases with large amounts of
constant folding code (for example, that produced by code specialization
or partial evaluation). In one example, it speeds up instcombine from
0.0589s to 0.0224s with a release build (a 2.6x speedup).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28215 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-10 19:00:36 +00:00
Chris Lattner
8d89e7bdbc
Patch to make some xforms preserve each other. Patch contributed by
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Domagoj Babic!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28181 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-09 04:13:41 +00:00
Chris Lattner
33a6113995
Move some code around.
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Make the "fold (and (cast A), (cast B)) -> (cast (and A, B))" transformation
only apply when both casts really will cause code to be generated. If one or
both doesn't, then this xform doesn't remove a cast.
This fixes Transforms/InstCombine/2006-05-06-Infloop.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28141 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-06 09:00:16 +00:00
Chris Lattner
581a7ad7c9
Fix an infinite loop compiling oggenc last night.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28128 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-05 20:51:30 +00:00
Chris Lattner
6fc205fc44
Implement InstCombine/cast.ll:test29
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28126 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-05 06:39:07 +00:00
Chris Lattner
e3158308e0
Fix Transforms/InstCombine/2006-05-04-DemandedBitCrash.ll
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28101 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-04 17:33:35 +00:00
Chris Lattner
b3674e4753
Add pass ID's for various passes, so they can be AddRequiredID. Patch by
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Domagoj Babic!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28048 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-02 04:24:36 +00:00
Chris Lattner
94046b4d10
Fix InstCombine/2006-04-28-ShiftShiftLongLong.ll
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28019 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-28 22:21:41 +00:00
Chris Lattner
ae74f55552
Fix Transforms/Reassociate/2006-04-27-ReassociateVector.ll
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28007 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-28 04:14:49 +00:00
Chris Lattner
d929f06f4d
Add support for inserting undef into a vector. This implements
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Transforms/InstCombine/vec_insert_to_shuffle.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27997 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-27 21:14:21 +00:00
Chris Lattner
634c76c08c
Fix some nondeterminstic behavior in the mem2reg pass that (in addition to
...
nondeterminism being bad) could cause some trivial missed optimizations (dead
phi nodes being left around for later passes to clean up).
With this, llvm-gcc4 now bootstraps and correctly compares. I don't know
why I never tried to do it before... :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27984 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-27 01:14:43 +00:00
Chris Lattner
df4f226cdc
Fix Transforms/ScalarRepl/2006-04-20-PromoteCrash.ll
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27912 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-20 20:48:50 +00:00
Andrew Lenharth
7a31b975fb
Make code match cvs commit message :)
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27881 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-20 15:41:37 +00:00
Andrew Lenharth
8117f9a40e
If we can convert the return pointer type into an integer that IntPtrType
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can be converted to losslessly, we can continue the conversion to a direct call.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27880 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-20 14:56:47 +00:00
Chris Lattner
fd6bdf0b0f
Turn x86 unaligned load/store intrinsics into aligned load/store instructions
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if the pointer is known aligned.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27781 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-17 22:26:56 +00:00
Chris Lattner
7f6cc0ccb5
Fix a bug in the 'shuffle(undef,x,mask) -> shuffle(x, undef,mask')' xform
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Make the insert/extract elt -> shuffle code more aggressive.
This fixes CodeGen/PowerPC/vec_shuffle.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27728 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-16 00:51:47 +00:00
Chris Lattner
706126dac1
Canonicalize shuffle(undef,x,mask) -> shuffle(x, undef,mask').
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27727 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-16 00:03:56 +00:00
Chris Lattner
efb47359ff
significant cleanups to code that uses insert/extractelt heavily. This builds
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maximal shuffles out of them where possible.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27717 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-15 01:39:45 +00:00
Chris Lattner
de6df88529
Teach scalarrepl to promote unions of vectors and floats, producing
...
insert/extractelement operations. This implements
Transforms/ScalarRepl/vector_promote.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27710 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-14 21:42:41 +00:00
Andrew Lenharth
61e99c9db8
linear -> constant time
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27652 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-13 13:43:31 +00:00
Reid Spencer
ad2072643a
Get rid of a signed/unsigned compare warning.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27625 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-12 19:28:15 +00:00
Chris Lattner
9fb9213083
Turn casts into getelementptr's when possible. This enables SROA to be more
...
aggressive in some cases where LLVMGCC 4 is inserting casts for no reason.
This implements InstCombine/cast.ll:test27/28.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27620 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-12 18:09:35 +00:00
Chris Lattner
389a6f58f7
Implement vec_shuffle.ll:test3
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27573 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-10 23:06:36 +00:00
Chris Lattner
a844fc4cb0
Implement InstCombine/vec_shuffle.ll:test[12]
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27571 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-10 22:45:52 +00:00
Andrew Lenharth
3433141a3e
Add a simple pass to make sure that all (non-library) calls to malloc and free
...
are visible to analysis as intrinsics. That is, make sure someone doesn't pass
free around by address in some struct (as happens in say 176.gcc).
This doesn't get rid of any indirect calls, just ensure calls to free and malloc
are always direct.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27560 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-10 19:26:09 +00:00
Chris Lattner
543abdf1d0
Add supprot for shufflevector
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27513 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-08 01:19:12 +00:00
Chris Lattner
8960766d45
Fix inlining of insert/extract element constantexprs
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27478 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-07 04:41:03 +00:00
Chris Lattner
e2ed057562
Lower vperm(x,y, mask) -> shuffle(x,y,mask) if mask is constant. This allows
...
us to compile oh-so-realistic stuff like this:
vec_vperm(A, B, (vector unsigned char){14});
to:
vspltb v0, v0, 14
instead of:
vspltisb v0, 14
vperm v0, v2, v1, v0
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27452 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-06 19:19:17 +00:00
Chris Lattner
4132afb0d2
vector casts of casts are eliminable. Transform this:
...
%tmp = cast <4 x uint> %tmp to <4 x int> ; <<4 x int>> [#uses=1]
%tmp = cast <4 x int> %tmp to <4 x float> ; <<4 x float>> [#uses=1]
into:
%tmp = cast <4 x uint> %tmp to <4 x float> ; <<4 x float>> [#uses=1]
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27355 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-02 05:43:13 +00:00
Chris Lattner
a1c3538537
Allow transforming this:
...
%tmp = cast <4 x uint>* %testData to <4 x int>* ; <<4 x int>*> [#uses=1]
%tmp = load <4 x int>* %tmp ; <<4 x int>> [#uses=1]
to this:
%tmp = load <4 x uint>* %testData ; <<4 x uint>> [#uses=1]
%tmp = cast <4 x uint> %tmp to <4 x int> ; <<4 x int>> [#uses=1]
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27353 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-02 05:37:12 +00:00
Chris Lattner
82ed58f9c4
Turn altivec lvx/stvx intrinsics into loads and stores. This allows the
...
elimination of one load from this:
int AreSecondAndThirdElementsBothNegative( vector float *in ) {
#define QNaN 0x7FC00000
const vector unsigned int testData = (vector unsigned int)( QNaN, 0, 0, QNaN );
vector float test = vec_ld( 0, (float*) &testData );
return ! vec_any_ge( test, *in );
}
Now generating:
_AreSecondAndThirdElementsBothNegative:
mfspr r2, 256
oris r4, r2, 49152
mtspr 256, r4
li r4, lo16(LCPI1_0)
lis r5, ha16(LCPI1_0)
addi r6, r1, -16
lvx v0, r5, r4
stvx v0, 0, r6
lvx v1, 0, r3
vcmpgefp. v0, v0, v1
mfcr r3, 2
rlwinm r3, r3, 27, 31, 31
xori r3, r3, 1
cntlzw r3, r3
srwi r3, r3, 5
mtspr 256, r2
blr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27352 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-02 05:30:25 +00:00
Chris Lattner
7224f84c15
Adjust to change in Intrinsics.gen interface.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27344 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-02 03:35:01 +00:00
Chris Lattner
3805dea3fe
add valuemapper support for inline asm
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27332 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-01 23:17:11 +00:00
Chris Lattner
ae1ab3989c
Fix InstCombine/2006-04-01-InfLoop.ll
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27330 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-01 22:05:01 +00:00
Chris Lattner
64daab56c2
Fold A^(B&A) -> (B&A)^A
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Fold (B&A)^A == ~B & A
This implements InstCombine/xor.ll:test2[56]
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27328 91177308-0d34-0410-b5e6-96231b3b80d8
2006-04-01 08:03:55 +00:00
Chris Lattner
6e6b0da303
If we can look through vector operations to find the scalar version of an
...
extract_element'd value, do so.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27323 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-31 23:01:56 +00:00
Chris Lattner
1f13c88939
extractelement(undef,x) -> undef
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27300 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-31 18:25:14 +00:00
Chris Lattner
df084ff78b
Fix Transforms/InstCombine/2006-03-30-ExtractElement.ll
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27261 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-30 22:02:40 +00:00
Chris Lattner
49aaa6a8ee
teach the inliner to work with packed constants
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27161 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-27 05:50:18 +00:00
Chris Lattner
98509ef3c7
Don't crash on packed logical ops
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27125 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-25 21:58:26 +00:00
Chris Lattner
98d9811db2
Fix spello
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27052 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-24 07:14:34 +00:00
Chris Lattner
0f862e50ae
add the actual cost to the debug info
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27051 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-24 07:14:00 +00:00
Jim Laskey
4ca9757a39
Strip changes to llvm.dbg intrinsics.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26993 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-23 18:11:33 +00:00
Jim Laskey
930ac0606c
Can't combine anymore - we don't have a chain through llvm.dbg intrinsics.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26992 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-23 18:10:42 +00:00
Chris Lattner
035c6a2356
silence a bogus gcc warning
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26953 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-22 17:27:24 +00:00
Chris Lattner
273f202890
Teach cee to propagate through switch statements. This implements
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Transforms/CorrelatedExprs/switch.ll
Patch contributed by Eric Kidd!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26872 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-19 19:37:24 +00:00
Evan Cheng
21495775e7
- Fixed a bogus if condition.
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- Added more debugging info.
- Allow reuse of IV of negative stride. e.g. -4 stride == 2 * iv of -2 stride.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26841 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-18 08:03:12 +00:00
Evan Cheng
4496a50deb
Sort StrideOrder so we can process the smallest strides first. This allows
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for more IV reuses.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26837 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-18 00:44:49 +00:00
Evan Cheng
eb8f9e2297
Allow users of iv / stride to be rewritten with expression that is a multiply
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of a smaller stride even if they have a common loop invariant expression part.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26828 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-17 19:52:23 +00:00
Evan Cheng
d1d6b5cce2
For each loop, keep track of all the IV expressions inserted indexed by
...
stride. For a set of uses of the IV of a stride which is a multiple
of another stride, do not insert a new IV expression. Rather, reuse the
previous IV and rewrite the uses as uses of IV expression multiplied by
the factor.
e.g.
x = 0 ...; x ++
y = 0 ...; y += 4
then use of y can be rewritten as use of 4*x for x86.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26803 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-16 21:53:05 +00:00
Chris Lattner
b2f6c0075c
Teach the strip pass to strip type names in addition to value names. This
...
is fallout from the type/value split in the symtab long long ago :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26785 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-15 19:22:41 +00:00
Chris Lattner
e9efecbf47
Implement a FIXME, recusively reassociating
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A*A*B + A*A*C --> A*(A*B+A*C) --> A*(A*(B+C))
This implements Reassociate/mul-factor3.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26757 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-14 16:04:29 +00:00
Chris Lattner
895b392269
extract some code into a method, no functionality change
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26755 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-14 07:11:11 +00:00
Chris Lattner
22a66c41f3
Promote shifts by a constant to multiplies so that we can reassociate
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(x<<1)+(y<<1) -> (X+Y)<<1. This implements
Transforms/Reassociate/shift-factor.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26753 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-14 06:55:18 +00:00
Evan Cheng
d277f2c669
Added target lowering hooks which LSR consults to make more intelligent
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transformation decisions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26738 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-13 23:14:23 +00:00
Jim Laskey
f4321a3a43
Handle the removal of the debug chain.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26729 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-13 13:07:37 +00:00
Chris Lattner
aeebe7f208
use autogenerated side-effect information
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26673 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-09 22:38:10 +00:00
Chris Lattner
e2b59d2760
fix a pasto
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26627 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-09 06:09:41 +00:00
Chris Lattner
25de486263
Fix a miscompilation of 188.ammp with the new CFE. 188.ammp is accessing
...
arrays out of range in a horrible way, but we shouldn't break it anyway.
Details in the comments.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26606 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-08 01:05:29 +00:00
Jim Laskey
e8c3e3b51c
Switch to using a numeric id for anchors.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26598 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-07 20:53:47 +00:00
Chris Lattner
e1c173bc77
Fix ConstantMerge/2006-03-07-DontMergeDiffSections.ll, a problem Jim
...
hypotheticalized about, where we would incorrectly merge two globals in
different sections.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26597 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-07 17:56:59 +00:00
Chris Lattner
51c26e911a
Teach the alignment handling code to look through constant expr casts and GEPs
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26580 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-07 01:28:57 +00:00
Chris Lattner
95a959dc1a
Teach instcombine to increase the alignment of memset/memcpy/memmove when
...
the pointer is known to come from either a global variable, alloca or
malloc. This allows us to compile this:
P = malloc(28);
memset(P, 0, 28);
into explicit stores on PPC instead of a memset call.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26577 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-06 20:18:44 +00:00
Chris Lattner
220b0cf3e4
Make vector narrowing more effective, implementing
...
Transforms/InstCombine/vec_narrow.ll. This add support for narrowing
extract_element(insertelement) also.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26538 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-05 00:22:33 +00:00
Chris Lattner
e5022fe4cd
Add factoring of multiplications, e.g. turning A*A+A*B into A*(A+B).
...
Testcase here: Transforms/Reassociate/mulfactor.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26524 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-04 09:31:13 +00:00
Chris Lattner
ab51f3fa96
Canonicalize (X+C1)*C2 -> X*C2+C1*C2
...
This implements Transforms/InstCombine/add.ll:test31
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26519 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-04 06:04:02 +00:00
Chris Lattner
21959390c1
Change this to work with renamed intrinsics.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26484 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-03 01:34:17 +00:00
Chris Lattner
aecb0627fa
Make this work with renamed intrinsics.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26482 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-03 01:30:23 +00:00
Chris Lattner
db3f873bd8
Generalize the REM folding code to handle another case Nick Lewycky
...
pointed out: realize the AND can provide factors and look through Casts.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26469 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-02 06:50:58 +00:00
Chris Lattner
06e1e25368
Fix a regression in a patch from a couple of days ago. This fixes
...
Transforms/InstCombine/2006-02-28-Crash.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26427 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-28 19:47:20 +00:00
Chris Lattner
9794392781
Implement rem.ll:test[7-9] and PR712
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26415 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-28 05:49:21 +00:00
Chris Lattner
6c9951b0da
Simplify some code now that the RHS of a rem can't be 0
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26413 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-28 05:40:55 +00:00
Chris Lattner
19ccd5c757
Rearrange some code, fold "rem X, 0", implementing rem.ll:test6
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26411 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-28 05:30:45 +00:00
Chris Lattner
3e88a4d700
Merge two almost-identical pieces of code.
...
Make this code more powerful by using ComputeMaskedBits instead of looking
for an AND operand. This lets us fold this:
int %test23(int %a) {
%tmp.1 = and int %a, 1
%tmp.2 = seteq int %tmp.1, 0
%tmp.3 = cast bool %tmp.2 to int ;; xor tmp1, 1
ret int %tmp.3
}
into: xor (and a, 1), 1
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26396 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-27 02:38:23 +00:00
Chris Lattner
26ab9a9218
Fold (A^B) == A -> B == 0
...
and (A-B) == A -> B == 0
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26394 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-27 01:44:11 +00:00
Chris Lattner
02bd1b3e94
Fold (X|C1)^C2 -> X^(C1|C2) when possible. This implements
...
InstCombine/or.ll:test23.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26385 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-26 19:57:54 +00:00
Chris Lattner
97f37a439c
Fix a problem that Nate noticed that boils down to an over conservative check
...
in the code that does "select C, (X+Y), (X-Y) --> (X+(select C, Y, (-Y)))".
We now compile this loop:
LBB1_1: ; no_exit
add r6, r2, r3
subf r3, r2, r3
cmpwi cr0, r2, 0
addi r7, r5, 4
lwz r2, 0(r5)
addi r4, r4, 1
blt cr0, LBB1_4 ; no_exit
LBB1_3: ; no_exit
mr r3, r6
LBB1_4: ; no_exit
cmpwi cr0, r4, 16
mr r5, r7
bne cr0, LBB1_1 ; no_exit
into this instead:
LBB1_1: ; no_exit
srawi r6, r2, 31
add r2, r2, r6
xor r6, r2, r6
addi r7, r5, 4
lwz r2, 0(r5)
addi r4, r4, 1
add r3, r3, r6
cmpwi cr0, r4, 16
mr r5, r7
bne cr0, LBB1_1 ; no_exit
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26356 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-24 18:05:58 +00:00
Chris Lattner
f8bf116f80
Fix Regression/Transforms/LoopUnswitch/2006-02-22-UnswitchCrash.ll, which
...
caused SPASS to fail building last night.
We can't trivially unswitch a loop if the exit block has phi nodes in it,
because we don't know which predecessor to use.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26320 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-22 23:55:00 +00:00
Chris Lattner
bd28e3f8ef
Add some comments, simplify some code, and fix a bug that caused rewriting
...
to rewrite with the wrong value.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26311 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-22 06:37:14 +00:00
Chris Lattner
a6fc94b71e
improved support for branch folding, still not enabled.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26289 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-18 07:57:38 +00:00
Jeff Cohen
bce4805d6f
Fix bugs identified by VC++.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26287 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-18 03:20:33 +00:00
Chris Lattner
db41024a85
Implement deletion of dead blocks, currently disabled.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26285 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-18 02:42:34 +00:00
Chris Lattner
caf4893536
a previous patch completely disabled trivial unswitching, this fixees it.
...
Thanks to nate for pointing this out :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26280 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-18 01:32:04 +00:00
Chris Lattner
f4412d890d
initial trivial support for folding branches that have now-constant destinations.
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26279 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-18 01:27:45 +00:00
Chris Lattner
25cae0fd1c
When unswitching a loop, make sure to update loop info with exit blocks in
...
the right loop.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26277 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-18 00:55:32 +00:00
Chris Lattner
299520de7c
Fix Transforms/SimplifyCFG/2006-02-17-InfiniteUnroll.ll
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26275 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-18 00:33:17 +00:00
Chris Lattner
0017d480cc
Fix loops where the header has an exit, fixing a loop-unswitch crash on crafty
...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26258 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-17 06:39:56 +00:00
Chris Lattner
52221f7b16
start of some new simplification code, not thoroughly tested, use at your own
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risk :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26248 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-17 00:31:07 +00:00
Nate Begeman
368e18d56a
Rework the SelectionDAG-based implementations of SimplifyDemandedBits
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and ComputeMaskedBits to match the new improved versions in instcombine.
Tested against all of multisource/benchmarks on ppc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26238 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-16 21:11:51 +00:00
Chris Lattner
10cd9bbde7
Change SplitBlock to increment a BasicBlock::iterator, not an Instruction*. Apparently they do different things :)
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This fixes a testcase that nate reduced from spass.
Also included are a couple minor code changes that don't affect the generated
code at all.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26235 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-16 19:36:22 +00:00
Jeff Cohen
21c107ab0f
Fix VC++ warning.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26228 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-16 04:07:37 +00:00
Chris Lattner
f17c42d409
fix a bug where we unswitched the wrong way
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26225 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-16 01:24:41 +00:00
Chris Lattner
a48654ef23
Implement trivial unswitching for switch stmts. This allows us to trivial
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unswitch this loop on 2 before sweating to unswitch on 1/3.
void test4(int N, int i, int C, int*P, int*Q) {
int j;
for (j = 0; j < N; ++j) {
switch (C) { // general unswitching.
default: P[i+j] = 0; break;
case 1: Q[i+j] = 0; break;
case 3: P[i+j] = Q[i+j]; break;
case 2: break; // TRIVIAL UNSWITCH on C==2
}
}
}
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26223 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-15 22:52:05 +00:00
Chris Lattner
4e1323969c
make "trivial" unswitching significantly more general. It can now handle
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this for example:
for (j = 0; j < N; ++j) { // trivial unswitch
if (C)
P[i+j] = 0;
}
turning it into the obvious code without bothering to duplicate an empty loop.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26220 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-15 22:03:36 +00:00
Andrew Lenharth
2f9859486a
fix a bunch of alpha regressions. see bug 709
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26218 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-15 21:13:37 +00:00
Chris Lattner
3fdde110eb
Checking the wrong value. This caused us to emit silly code like
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Y = seteq bool X, true
instead of just using X :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26215 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-15 19:05:52 +00:00
Chris Lattner
6d9d13d2e4
more refactoring, no functionality change.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26194 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-15 01:44:42 +00:00
Chris Lattner
fed5d9dbd3
pull some code out into a function
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26191 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-15 00:07:43 +00:00
Chris Lattner
0ab9f966de
Canonicalize inner loops before outer loops. Inner loop canonicalization
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can provide work for the outer loop to canonicalize.
This fixes a case that breaks unswitching.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26189 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-14 23:06:02 +00:00
Chris Lattner
c27e056d4f
When splitting exit edges to canonicalize loops, make sure to put the new
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block in the appropriate loop nest.
Third time is the charm, right?
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26187 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-14 22:34:08 +00:00
Chris Lattner
3dd4c402de
Use statistics to keep track of what flavors of loops we are unswitching
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26157 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-14 01:01:41 +00:00
Chris Lattner
2082ad9b41
Implement Instcombine/and.ll:test34
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26155 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-13 23:07:23 +00:00
Chris Lattner
f345fe4d9a
If any of the sign extended bits are demanded, the input sign bit is demanded
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for a sign extension.
This fixes InstCombine/2006-02-13-DemandedMiscompile.ll and Ptrdist/bc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26152 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-13 22:41:07 +00:00
Chris Lattner
c15637bafc
Be careful not to request or look at bits shifted in from outside the size
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of the input. This fixes the mediabench/gsm/toast failure last night.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26138 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-13 06:09:08 +00:00
Chris Lattner
8d6bbdbbcb
remove some more dead special case code
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26135 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-12 08:07:37 +00:00
Chris Lattner
f8c36f502b
Eliminate special case hacks that are superceded by general purpose hacks
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26134 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-12 08:02:11 +00:00
Chris Lattner
bf5d8a8270
Three changes:
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1. Teach GetConstantInType to handle boolean constants.
2. Teach instcombine to fold (compare X, CST) when X has known 0/1 bits.
Testcase here: set.ll:test22
3. Improve the "(X >> c1) & C2 == 0" folding code to allow a noop cast
between the shift and and. More aggressive bitfolding for other reasons
was turning signed shr's into unsigned shr's, leaving the noop cast in
the way.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26131 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-12 02:07:56 +00:00
Chris Lattner
ee628cfefb
Revert my last patch. It too breaks stuff
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26128 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-12 01:59:10 +00:00
Chris Lattner
d308ddcd67
Fix for my previously reverted patch
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26126 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-11 21:24:54 +00:00
Chris Lattner
255d8919b6
Port the recent innovations in ComputeMaskedBits to SimplifyDemandedBits.
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This allows us to simplify on conditions where bits are not known, but they
are not demanded either! This also fixes a couple of bugs in
ComputeMaskedBits that were exposed during this work.
In the future, swaths of instcombine should be removed, as this code
subsumes a bunch of ad-hockery.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26122 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-11 09:31:47 +00:00
Chris Lattner
5077c7be92
revert my previous change, it exposed other problems.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26121 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-11 08:47:47 +00:00
Chris Lattner
8587eb3a51
Make this check stricter. Disallow loop exit blocks from being shared by
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loops and their subloops.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26118 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-11 02:13:17 +00:00
Chris Lattner
441365c46e
remove dead expr
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26116 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-11 01:43:37 +00:00
Chris Lattner
c23580969f
implement unswitching of loops with switch stmts and selects in them
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26114 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-11 00:43:37 +00:00
Chris Lattner
e825593bf2
Update PHI nodes in successors of exit blocks.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26113 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-10 23:26:14 +00:00
Chris Lattner
b2bc315eac
Reform the unswitching code in terms of edge splitting, not block splitting.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26112 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-10 23:16:39 +00:00
Chris Lattner
81be2e961b
Fix a case where UnswitchTrivialCondition broke critical edges with
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phi's in the successors
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26108 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-10 19:08:15 +00:00
Chris Lattner
708e1a5c9c
add some notes, move some code around. Implement unswitching of loops
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with branches on partially invariant computations.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26104 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-10 02:30:37 +00:00
Chris Lattner
dd3ee6d086
Move code around to be more logical, no functionality change.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26103 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-10 02:01:22 +00:00
Chris Lattner
4d1ca946ea
When unswitching a trivial loop, do admit we are doing it! :)
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26102 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-10 01:36:35 +00:00
Chris Lattner
4c41d49a92
Implement unconditional unswitching of 'trivial' loops, those loops that contain
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branches in their entry block that control whether or not the loop is a noop or not.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26101 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-10 01:24:09 +00:00
Chris Lattner
f4f5f4e56f
Simplify control flow a bit, note that unswitch preserves canonical loop form
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26098 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-09 22:15:42 +00:00
Chris Lattner
e487abbfbf
Make the threshold a parameter
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26093 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-09 20:15:48 +00:00
Chris Lattner
2f4b898e8c
Simplify the loop-unswitch pass, by not even trying to unswitch loops with
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uses of loop values outside the loop. We need loop-closed SSA form to do
this right, or to use SSA rewriting if we really care.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26089 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-09 19:14:52 +00:00
Chris Lattner
9a4cacb7c2
Fix 80-column violations
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26088 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-09 07:41:14 +00:00
Chris Lattner
68d5ff2b83
Enhance MVIZ in three ways:
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1. Teach it new tricks: in particular how to propagate through signed shr and sexts.
2. Teach it to return a bitset of known-1 and known-0 bits, instead of just zero.
3. Teach instcombine (AND X, C) to fold when we know all C bits of X.
This implements Regression/Transforms/InstCombine/bittest.ll, and allows
future things to be simplified.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26087 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-09 07:38:58 +00:00
Chris Lattner
7560c3af83
Simplify some code, reducing calls to MaskedValueIsZero. Implement a minor
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optimization where we reduce the number of bits in AND masks when possible.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26056 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-08 07:34:50 +00:00
Chris Lattner
9ca96410fc
Use EraseInstFromFunction in a few cases to put the uses of the removed
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instruction onto the worklist (in case they are now dead).
Add a really trivial local DSE implementation to help out bitfield code.
We now fold this:
struct S {
unsigned char a : 1, b : 1, c : 1, d : 2, e : 3;
S();
};
S::S() : a(0), b(0), c(1), d(0), e(6) {}
to this:
void %_ZN1SC1Ev(%struct.S* %this) {
entry:
%tmp.1 = getelementptr %struct.S* %this, int 0, uint 0
store ubyte 38, ubyte* %tmp.1
ret void
}
much earlier (in gccas instead of only in gccld after DSE runs).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26050 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-08 03:25:32 +00:00
Chris Lattner
fe243ebb64
Implement some more interesting select sccp cases. This implements:
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test/Regression/Transforms/SCCP/select.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26049 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-08 02:38:11 +00:00
Chris Lattner
62d1ade893
Fix a problem in my patch yesterday, causing a miscompilation of 176.gcc
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26045 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-08 01:20:23 +00:00
Chris Lattner
d89d888cc5
Fix Transforms/InstCombine/2006-02-07-SextZextCrash.ll
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26040 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-07 19:07:40 +00:00
Chris Lattner
74c51a0ff2
Generalize MaskedValueIsZero into a ComputeMaskedNonZeroBits function, which
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is just as efficient as MVIZ and is also more general.
Fix a few minor bugs introduced in recent patches
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26036 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-07 08:05:22 +00:00
Chris Lattner
3bedbd9d71
Make MaskedValueIsZero take a uint64_t instead of a ConstantIntegral as a
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mask. This allows the code to be simpler and more efficient.
Also, generalize some of the cases in MVIZ a bit, making it slightly more aggressive.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26035 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-07 07:27:52 +00:00
Chris Lattner
1a074fce15
Use Type::getIntegralTypeMask() to simplify some code
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26034 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-07 07:00:41 +00:00
Chris Lattner
6dce1a7dfe
Implement the beginnings of a facility for simplifying expressions based on
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'demanded bits', inspired by Nate's work in the dag combiner. This isn't
complete, but needs to unrelated instcombiner changes to continue.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26033 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-07 06:56:34 +00:00
Chris Lattner
5f3b0eeddb
Turn A % (C << N), where C is 2^k, into A & ((C << N)-1) [urem only].
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Turn A / (C1 << N), where C1 is "1<<C2" into A >> (N+C2) [udiv only].
Tested with: rem.ll:test5, div.ll:test10
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26003 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-05 07:54:04 +00:00
Chris Lattner
0a70f219f4
Use SCEVExpander::InsertCastOfTo instead of our own code. This reduces
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#LLVM LOC, and auto-cse's cast instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25974 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-04 09:52:43 +00:00
Chris Lattner
221fc3c6d6
Fix two significant bugs in LSR:
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1. When rewriting code in outer loops, sometimes we would insert code into
inner loops that is invariant in that loop.
2. Notice that 4*(2+x) is 8+4*x and use that to simplify expressions.
This is a performance neutral change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25964 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-04 07:36:50 +00:00
Jeff Cohen
9471c8a93b
Improve compatibility with VC2005, patch by Morten Ofstad!
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25661 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-26 20:41:32 +00:00
Chris Lattner
f47a6b4882
teach the cloner to handle inline asms
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25633 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-26 01:55:22 +00:00
Chris Lattner
15256cb14e
Fix Regression/Transforms/ScalarRepl/2006-01-24-IllegalUnionPromoteCrash.ll
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25587 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-24 19:36:27 +00:00
Chris Lattner
3e2fa7a746
rename method
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25572 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-24 04:16:34 +00:00
Chris Lattner
9771aeafca
When cloning a module, clone the inline asm.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25559 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-23 23:06:28 +00:00
Chris Lattner
e46f6e99a0
add a bunch more optimizations for unary double math functions
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25530 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-23 06:24:46 +00:00
Chris Lattner
7070c5f241
Refactor/genericize this, no functionality change
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25525 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-23 05:57:36 +00:00
Chris Lattner
dac58ad983
Make iostream #inclusion explicit
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25514 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-22 23:32:06 +00:00