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Author SHA1 Message Date
Chris Lattner
33fd4611f5 Use statistics to keep track of what flavors of loops we are unswitching 
llvm-svn: 26157
 2006-02-14 01:01:41 +00:00
Chris Lattner
d3cfbeca5b Fix a latent bug in the call sequence handling stuff. Some targets (e.g. x86) 
create these nodes with flag results.  Remember that we legalized them.

llvm-svn: 26156
 2006-02-14 00:55:02 +00:00
Chris Lattner
9f91f1e3c8 Implement Instcombine/and.ll:test34 
llvm-svn: 26155
 2006-02-13 23:07:23 +00:00
Chris Lattner
7ea9303a2f new testcase 
llvm-svn: 26154
 2006-02-13 23:07:02 +00:00
Chris Lattner
307a2b55bb Fix typo that caused build failures for things trying to use m_Or. 
llvm-svn: 26153
 2006-02-13 23:06:39 +00:00
Chris Lattner
24d29462d2 If any of the sign extended bits are demanded, the input sign bit is demanded 
for a sign extension.

This fixes InstCombine/2006-02-13-DemandedMiscompile.ll and Ptrdist/bc.

llvm-svn: 26152
 2006-02-13 22:41:07 +00:00
Chris Lattner
0cabe967ce testcase reduced from Ptrdist/bc that is miscompiled by recent instcombine changes. 
llvm-svn: 26151
 2006-02-13 22:31:50 +00:00
Chris Lattner
bdcb7e09c3 Another hack due to allowing multiple symbols with the same name. 
llvm-svn: 26150
 2006-02-13 22:22:42 +00:00
Chris Lattner
b0362b8640 Another work around for the 'symbols with different types can have the same 
name' issue.

llvm-svn: 26149
 2006-02-13 21:43:26 +00:00
Andrew Lenharth
0a245834aa improved zap discovery 
llvm-svn: 26148
 2006-02-13 18:52:29 +00:00
Andrew Lenharth
e5ed262832 test for improved zap discovery 
llvm-svn: 26147
 2006-02-13 18:52:01 +00:00
Jim Laskey
40610cacc0 Sync up the tag numbers with gcc4. 
llvm-svn: 26146
 2006-02-13 16:56:43 +00:00
Jim Laskey
fac853338f Rename to better reflect usage (current and planned.) 
llvm-svn: 26145
 2006-02-13 12:50:39 +00:00
Chris Lattner
b3fc3e3a90 Completely rewrite libcall insertion by the legalizer, providing the 
following handy-dandy properties:

1. it is always correct now
2. it is much faster than before
3. it is easier to understand

This implementation builds off of the recent simplifications of the
legalizer that made it single-pass instead of iterative.

This fixes JM/lencod, JM/ldecod, and
CodeGen/Generic/2006-02-12-InsertLibcall.ll (at least on PPC).

llvm-svn: 26144
 2006-02-13 09:18:02 +00:00
Chris Lattner
599b432345 Switch targets over to using SelectionDAG::getCALLSEQ_START to create 
CALLSEQ_START nodes.

llvm-svn: 26143
 2006-02-13 09:00:43 +00:00
Chris Lattner
9db5a1fd19 Switch to using getCALLSEQ_START instead of using our own creation calls 
llvm-svn: 26142
 2006-02-13 08:55:29 +00:00
Chris Lattner
2d35c6e90f Add a method 
llvm-svn: 26141
 2006-02-13 08:54:46 +00:00
Chris Lattner
6be56c0224 this passes now, due to Nate's recent efforts 
llvm-svn: 26140
 2006-02-13 07:26:36 +00:00
Chris Lattner
08a6bf6cd6 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
19ac3230f6 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
d743021686 Added a test case for a libcall insertion bug. 
llvm-svn: 26137
 2006-02-12 10:24:00 +00:00
Nate Begeman
7261b82dd7 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
3b748923cd remove some more dead special case code 
llvm-svn: 26135
 2006-02-12 08:07:37 +00:00
Chris Lattner
169c4ef1ec Eliminate special case hacks that are superceded by general purpose hacks 
llvm-svn: 26134
 2006-02-12 08:02:11 +00:00
Chris Lattner
5e867a74d3 tweaks 
llvm-svn: 26133
 2006-02-12 08:01:35 +00:00
Chris Lattner
c1cb72a3a3 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
0583a337fb new testcase 
llvm-svn: 26130
 2006-02-12 02:06:31 +00:00
Chris Lattner
76e0e3fe40 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
54a36a05b3 Revert my last patch. It too breaks stuff 
llvm-svn: 26128
 2006-02-12 01:59:10 +00:00
Chris Lattner
d8c54dc866 Make these tests fail if opt crashes. 
llvm-svn: 26127
 2006-02-12 01:32:58 +00:00
Chris Lattner
7c61638c1b Fix for my previously reverted patch 
llvm-svn: 26126
 2006-02-11 21:24:54 +00:00
Chris Lattner
e6b05ffc0f Update comments to be actually accurate 
llvm-svn: 26124
 2006-02-11 09:37:07 +00:00
Chris Lattner
5267440902 This is implemented by the simplify-libcalls pass, not instcombine 
llvm-svn: 26123
 2006-02-11 09:33:28 +00:00
Chris Lattner
9b092ebf17 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
05b7c448f3 revert my previous change, it exposed other problems. 
llvm-svn: 26121
 2006-02-11 08:47:47 +00:00
Duraid Madina
81b9a8f8f7 fix storing booleans (grawp missed this one) 
llvm-svn: 26120
 2006-02-11 07:33:17 +00:00
Duraid Madina
a514d8d8a6 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
c859e1d2b5 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
1b8029264a 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
95fccc4772 remove dead expr 
llvm-svn: 26116
 2006-02-11 01:43:37 +00:00
Jim Laskey
55467f611d 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
f7cf05d3a2 implement unswitching of loops with switch stmts and selects in them 
llvm-svn: 26114
 2006-02-11 00:43:37 +00:00
Chris Lattner
ec24272c6f Update PHI nodes in successors of exit blocks. 
llvm-svn: 26113
 2006-02-10 23:26:14 +00:00
Chris Lattner
672c45a3c0 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
eaaafb36c8 Nicer code. :-) 
llvm-svn: 26111
 2006-02-10 22:46:26 +00:00
Evan Cheng
d141f84c34 Added X86 isel debugging stuff. 
llvm-svn: 26110
 2006-02-10 22:24:32 +00:00
Chris Lattner
0d03d576e4 Remove a level of indirection. 
llvm-svn: 26109
 2006-02-10 21:32:11 +00:00
Chris Lattner
ada27b9dba 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
f8458d73bb 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
0dc11e140e Update to new-style flags usage, simplifying the .td file 
llvm-svn: 26106
 2006-02-10 06:58:25 +00:00