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22873 Commits

Author SHA1 Message Date
Chris Lattner 5a30d8367a Add a method 
llvm-svn: 26141
 2006-02-13 08:54:46 +00:00
Chris Lattner d062f09026 this passes now, due to Nate's recent efforts 
llvm-svn: 26140
 2006-02-13 07:26:36 +00:00
Chris Lattner 4c388281c1 Reduce this testcase a bit more, with the help of llvm-extract and some hand tweaks 
llvm-svn: 26139
 2006-02-13 07:02:50 +00:00
Chris Lattner 68e7475777 Be careful not to request or look at bits shifted in from outside the size 
of the input.  This fixes the mediabench/gsm/toast failure last night.

llvm-svn: 26138
 2006-02-13 06:09:08 +00:00
Evan Cheng 0684e9ae6d Added a test case for a libcall insertion bug. 
llvm-svn: 26137
 2006-02-12 10:24:00 +00:00
Nate Begeman bc3ec1d37b Add missing patterns for andi. and andis., fixing test/Regression/CodeGen/ 
PowerPC/and-imm.ll

llvm-svn: 26136
 2006-02-12 09:09:52 +00:00
Chris Lattner f5b4ef7f58 remove some more dead special case code 
llvm-svn: 26135
 2006-02-12 08:07:37 +00:00
Chris Lattner 5b2edb1fca Eliminate special case hacks that are superceded by general purpose hacks 
llvm-svn: 26134
 2006-02-12 08:02:11 +00:00
Chris Lattner e6ebe1af61 tweaks 
llvm-svn: 26133
 2006-02-12 08:01:35 +00:00
Chris Lattner ee0f280743 Three changes: 
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.

llvm-svn: 26131
 2006-02-12 02:07:56 +00:00
Chris Lattner 2234a136b3 new testcase 
llvm-svn: 26130
 2006-02-12 02:06:31 +00:00
Chris Lattner 5e488c9cc2 move a failing testcase from bit-tracking.ll to narrow.ll, and move the 
xfail marker with it

llvm-svn: 26129
 2006-02-12 02:02:43 +00:00
Chris Lattner 02f53ad3a2 Revert my last patch. It too breaks stuff 
llvm-svn: 26128
 2006-02-12 01:59:10 +00:00
Chris Lattner 8e99b0baca Make these tests fail if opt crashes. 
llvm-svn: 26127
 2006-02-12 01:32:58 +00:00
Chris Lattner 35248e06bc Fix for my previously reverted patch 
llvm-svn: 26126
 2006-02-11 21:24:54 +00:00
Chris Lattner f3ed03481a Update comments to be actually accurate 
llvm-svn: 26124
 2006-02-11 09:37:07 +00:00
Chris Lattner 00601c0c7e This is implemented by the simplify-libcalls pass, not instcombine 
llvm-svn: 26123
 2006-02-11 09:33:28 +00:00
Chris Lattner 0157e7f55b Port the recent innovations in ComputeMaskedBits to SimplifyDemandedBits. 
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.

llvm-svn: 26122
 2006-02-11 09:31:47 +00:00
Chris Lattner b24ce3a2a8 revert my previous change, it exposed other problems. 
llvm-svn: 26121
 2006-02-11 08:47:47 +00:00
Duraid Madina 4698e4f5fe fix storing booleans (grawp missed this one) 
llvm-svn: 26120
 2006-02-11 07:33:17 +00:00
Duraid Madina 0010a92375 now short immediates will get matched (previously constants were all 
triggering movl 64bit imm fat instructions)

llvm-svn: 26119
 2006-02-11 07:32:15 +00:00
Chris Lattner 05bf90dddf Make this check stricter. Disallow loop exit blocks from being shared by 
loops and their subloops.

llvm-svn: 26118
 2006-02-11 02:13:17 +00:00
Evan Cheng a86ba85dc5 Prevent certain nodes that have already been selected from being folded into 
X86 addressing mode. Currently we do not allow any node whose target node
produces a chain as well as any node that is at the root of the addressing
mode expression tree.

llvm-svn: 26117
 2006-02-11 02:05:36 +00:00
Chris Lattner a6ae101afa remove dead expr 
llvm-svn: 26116
 2006-02-11 01:43:37 +00:00
Jim Laskey 5995d0160c Reorg for integration with gcc4. Old style debug info will not be passed though 
to SelIDAG.

llvm-svn: 26115
 2006-02-11 01:01:30 +00:00
Chris Lattner fbadd7e1ee implement unswitching of loops with switch stmts and selects in them 
llvm-svn: 26114
 2006-02-11 00:43:37 +00:00
Chris Lattner f1b151684d Update PHI nodes in successors of exit blocks. 
llvm-svn: 26113
 2006-02-10 23:26:14 +00:00
Chris Lattner fe4151efe7 Reform the unswitching code in terms of edge splitting, not block splitting. 
llvm-svn: 26112
 2006-02-10 23:16:39 +00:00
Evan Cheng 2b6f78b664 Nicer code. :-) 
llvm-svn: 26111
 2006-02-10 22:46:26 +00:00
Evan Cheng d49cc3634e Added X86 isel debugging stuff. 
llvm-svn: 26110
 2006-02-10 22:24:32 +00:00
Chris Lattner 975486db5e Remove a level of indirection. 
llvm-svn: 26109
 2006-02-10 21:32:11 +00:00
Chris Lattner ec6b40a093 Fix a case where UnswitchTrivialCondition broke critical edges with 
phi's in the successors

llvm-svn: 26108
 2006-02-10 19:08:15 +00:00
Chris Lattner fcb8a3aa76 Use the auto-generated call matcher. Remove a broken impl of the frameaddr/returnaddr 
intrinsics.

Autogen frameindex matcher

llvm-svn: 26107
 2006-02-10 07:35:42 +00:00
Chris Lattner 0c4dea4cb2 Update to new-style flags usage, simplifying the .td file 
llvm-svn: 26106
 2006-02-10 06:58:25 +00:00
Evan Cheng 907be3e24c Remove a completed entry; add a new entry about fisttp op 
llvm-svn: 26105
 2006-02-10 05:48:15 +00:00
Chris Lattner 6e263155a6 add some notes, move some code around. Implement unswitching of loops 
with branches on partially invariant computations.

llvm-svn: 26104
 2006-02-10 02:30:37 +00:00
Chris Lattner 4935417a84 Move code around to be more logical, no functionality change. 
llvm-svn: 26103
 2006-02-10 02:01:22 +00:00
Chris Lattner 3fc3148b85 When unswitching a trivial loop, do admit we are doing it! :) 
llvm-svn: 26102
 2006-02-10 01:36:35 +00:00
Chris Lattner ed7a67b0de Implement unconditional unswitching of 'trivial' loops, those loops that contain 
branches in their entry block that control whether or not the loop is a noop or not.

llvm-svn: 26101
 2006-02-10 01:24:09 +00:00
Chris Lattner 4f0e66df6a Simplify control flow a bit, note that unswitch preserves canonical loop form 
llvm-svn: 26098
 2006-02-09 22:15:42 +00:00
Evan Cheng 101e4b916a Match tblgen change. 
llvm-svn: 26096
 2006-02-09 22:12:53 +00:00
Evan Cheng 5940bc210e Call InsertISelMapEntry rather than map insertion operator to prevent overly 
aggrssive inlining. This reduces Select_store frame size from 24k to 10k.

llvm-svn: 26095
 2006-02-09 22:12:27 +00:00
Evan Cheng a1ef3ec5b5 Added SelectionDAG::InsertISelMapEntry(). This is used to workaround the gcc 
problem where it inline the map insertion call too aggressively. Before this
change it was producing a frame size of 24k for Select_store(), now it's down
to 10k (by calling this method rather than calling the map insertion operator).

llvm-svn: 26094
 2006-02-09 22:11:03 +00:00
Chris Lattner 8976219850 Make the threshold a parameter 
llvm-svn: 26093
 2006-02-09 20:15:48 +00:00
Chris Lattner 4c0bd5bcdf Done 
llvm-svn: 26091
 2006-02-09 20:00:19 +00:00
Chris Lattner 5259aa1c86 Enable LSR by default for SPARC: it is a clear win. 
llvm-svn: 26090
 2006-02-09 19:59:55 +00:00
Chris Lattner 2826e0511b Simplify the loop-unswitch pass, by not even trying to unswitch loops with 
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.

llvm-svn: 26089
 2006-02-09 19:14:52 +00:00
Chris Lattner 24cd2fa269 Fix 80-column violations 
llvm-svn: 26088
 2006-02-09 07:41:14 +00:00
Chris Lattner 4534dd59a3 Enhance MVIZ in three ways: 
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.

llvm-svn: 26087
 2006-02-09 07:38:58 +00:00
Chris Lattner 11f380962b new testcase 
llvm-svn: 26086
 2006-02-09 07:38:30 +00:00