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Author SHA1 Message Date
Chris Lattner
e3584964b8 if an instr lacks a pattern, assume it has side effects (unless never has s-e is true). 
llvm-svn: 45823
 2008-01-10 05:40:54 +00:00
Chris Lattner
6a41e14ee2 start inferring 'no side effects'. 
llvm-svn: 45822
 2008-01-10 05:39:30 +00:00
Chris Lattner
9b4f2b2316 get def use info more correct. 
llvm-svn: 45821
 2008-01-10 05:12:37 +00:00
Chris Lattner
bd352f9008 Infer mayload 
llvm-svn: 45819
 2008-01-10 04:44:48 +00:00
Chris Lattner
3aa2fc1b5c add SDNPMayLoad to the 'load' sdnode definition. This is enough to get all the x86 
instructions (with patterns) that load memory marked, for example.

llvm-svn: 45818
 2008-01-10 04:44:32 +00:00
Chris Lattner
c656c40445 realize that instructions who match intrinsics that read memory read memory. 
Also, instructions with any nodes that are SDNPMayLoad also read memory.

llvm-svn: 45817
 2008-01-10 04:38:57 +00:00
Chris Lattner
8e486a6b25 verify that the frame index is immutable before remat'ing (still disabled) 
or being side-effect free.

llvm-svn: 45816
 2008-01-10 04:16:31 +00:00
Owen Anderson
59c3242247 Don't use LiveVariables::VarInfo::DefInst. 
llvm-svn: 45815
 2008-01-10 03:12:54 +00:00
Evan Cheng
0747381b13 Codegen improvement has reduced one spill. 
llvm-svn: 45814
 2008-01-10 02:54:40 +00:00
Evan Cheng
8846740401 Mark byval parameter stack objects mutable for now. 
llvm-svn: 45813
 2008-01-10 02:24:25 +00:00
Evan Cheng
f20828226e Add a isImmutable bit to StackObject. Fixed stack objects are immutable (in the function) unless specified otherwise. 
llvm-svn: 45812
 2008-01-10 02:18:37 +00:00
Dale Johannesen
fdd4b3846f Emit unused EH frames for weak definitions on Darwin, 
because assembler/linker can't cope with weak absolutes.
PR 1880.

llvm-svn: 45811
 2008-01-10 02:03:30 +00:00
Owen Anderson
a8f32828c8 Get rid of all uses of LiveVariables::VarInfo::DefInst in favor of the equivalent API from 
MachineRegisterInfo.  Once all clients are switched over, the former will be going away.

llvm-svn: 45805
 2008-01-10 01:36:43 +00:00
Chris Lattner
d3a396668c provide def_* and use_* iterators in addition to reg_* iterators. 
The first only returns definitions of a register, the second only
returns uses, the third returns both.

llvm-svn: 45803
 2008-01-10 01:01:27 +00:00
Owen Anderson
e2b710013f Add more comments explaining the basics of how the decision of when to rename and when to insert 
copies is made.

llvm-svn: 45799
 2008-01-10 00:47:01 +00:00
Evan Cheng
f6fd56d085 Do not use the stack pointer directly, issue a copyfromreg instead. Otherwise we can end up with something like ADD32ri %esp, x which two-address pass won't like. 
llvm-svn: 45798
 2008-01-10 00:37:26 +00:00
Owen Anderson
a0e5b9a317 Get rid of the isKillInst predicate. LiveVariables already provides this information. 
llvm-svn: 45797
 2008-01-10 00:33:11 +00:00
Chris Lattner
b02074514e Fix PR1845 and rdar://5676945. Generic vectors smaller 
than hardware supported type will be scalarized, so we
can infer their alignment from that info.

We now codegen pr1845 into:

_boolVectorSelect:
	lbz r2, 0(r3)
	stb r2, -16(r1)
	blr 

llvm-svn: 45796
 2008-01-10 00:30:57 +00:00
Chris Lattner
cce1483bcf new testcase for PR1845 
llvm-svn: 45795
 2008-01-10 00:30:38 +00:00
Evan Cheng
7581a2a634 Remove comments that do not correspond to anything after recent refactoring. 
llvm-svn: 45792
 2008-01-10 00:09:10 +00:00
Owen Anderson
b5be87349c Copies need to be inserted before the first terminator, not at the end of the block. 
llvm-svn: 45791
 2008-01-10 00:01:41 +00:00
Evan Cheng
ba0214a6cb Special copy SUnit's do not have SDNode's. 
llvm-svn: 45787
 2008-01-09 23:01:55 +00:00
Owen Anderson
62bb891e23 Clean up StrongPHIElimination a bit, and add some more comments to the internal structures. There's 
still more work to do on this front.

llvm-svn: 45783
 2008-01-09 22:40:54 +00:00
Duncan Sands
e97a9a373a Fix compile failures with g++-4.3. 
llvm-svn: 45781
 2008-01-09 19:42:09 +00:00
Chris Lattner
68e4b52d98 many cleanups and fixed, contributed by Sam Bishop 
llvm-svn: 45780
 2008-01-09 19:28:50 +00:00
Owen Anderson
9555739636 StrongPHIElim: Now with even fewer trivial bugs! 
llvm-svn: 45775
 2008-01-09 10:41:39 +00:00
Owen Anderson
c937ae34a5 Fix an infinite recursion bug in InsertCopies. 
llvm-svn: 45774
 2008-01-09 10:32:30 +00:00
Owen Anderson
01e1f23391 Fix some simple bugs. StrongPHIElimination now does not crash on 164.gzip. 
llvm-svn: 45773
 2008-01-09 06:19:05 +00:00
Evan Cheng
f91cfb435f Fix sse2.psrl.w and sse2.psrl.q definitions. 
llvm-svn: 45772
 2008-01-09 02:16:44 +00:00
Chris Lattner
2570c282eb Fix llvm-ld -Xlinker, patch by Daniel Teske! 
llvm-svn: 45770
 2008-01-09 01:01:17 +00:00
Chris Lattner
c465555fe6 add a testcase 
llvm-svn: 45768
 2008-01-09 00:37:18 +00:00
Chris Lattner
4253eeaeb3 add a note 
llvm-svn: 45766
 2008-01-09 00:17:57 +00:00
Chris Lattner
c93ad7d569 Make load->store deletion a bit smarter. This allows us to compile this: 
void test(long long *P) { *P ^= 1; }

into just:

_test:
	movl	4(%esp), %eax
	xorl	$1, (%eax)
	ret

instead of code like this:

_test:
	movl	4(%esp), %ecx
        xorl    $1, (%ecx)
	movl	4(%ecx), %edx
	movl	%edx, 4(%ecx)
	ret

llvm-svn: 45762
 2008-01-08 23:08:06 +00:00
Owen Anderson
3d5485728a Rename registers that do not need copies. 
llvm-svn: 45759
 2008-01-08 21:54:52 +00:00
Duncan Sands
b3b1ae18ab Crashes llc when using Chris's new legalization logic. 
llvm-svn: 45758
 2008-01-08 21:51:53 +00:00
Ted Kremenek
8461cdc206 Added "getRoot()" to ImmutableMap. 
Made the ctor for ImmutableMap to construct a map from an AVL tree public.

llvm-svn: 45756
 2008-01-08 21:05:59 +00:00
Ted Kremenek
9d742fd3c4 Fixed 80 col. violation. 
llvm-svn: 45752
 2008-01-08 19:38:55 +00:00
Chris Lattner
9b7b3ade8f add a mayLoad property for machine instructions, a correlary to mayStore. 
This is currently not set by anything.

llvm-svn: 45748
 2008-01-08 18:05:21 +00:00
Duncan Sands
6f28b87039 Use size_t to store Pos, avoid truncating value 
on 64-bit builds.  Analysis and original patch
by Török Edwin.  Code audit found another place
with the same problem, also fixed here.

llvm-svn: 45746
 2008-01-08 10:06:15 +00:00
Chris Lattner
67f581b344 Implement PR1795, an instcombine hack for forming GEPs with integer pointer arithmetic. 
llvm-svn: 45745
 2008-01-08 07:23:51 +00:00
Chris Lattner
a39e69f292 add match support for casts. 
llvm-svn: 45744
 2008-01-08 07:02:44 +00:00
Chris Lattner
aeab9aefb3 remove darwin/i386 t-t 
llvm-svn: 45743
 2008-01-08 06:52:51 +00:00
Chris Lattner
cafc567fb7 Finally implement correct ordered comparisons for PPC, even though 
the code generated is not wonderful.  This turns a miscompilation into
a code quality bug (noted in the ppc readme).  This fixes PR642, which
is over 2 years old (!).  Nate, please review this.

llvm-svn: 45742
 2008-01-08 06:46:30 +00:00
Chris Lattner
7853f9d2df Testcase for PR1721 
llvm-svn: 45739
 2008-01-08 05:16:29 +00:00
Owen Anderson
23abe71f4d Actually insert copies now! 
llvm-svn: 45738
 2008-01-08 05:16:15 +00:00
Chris Lattner
3ca4e2df70 Fix PR1797 
llvm-svn: 45736
 2008-01-08 04:26:20 +00:00
Evan Cheng
e7fd8ad117 Minor fix to enable x86-64 pic jit (still fails for other reasons). 
llvm-svn: 45734
 2008-01-08 02:07:10 +00:00
Evan Cheng
165d39b8e4 Fix a x86-64 static codegen bug. This fixes a lot of x86-64 jit failures. 
llvm-svn: 45733
 2008-01-08 02:06:11 +00:00
Bill Wendling
e859abc363 Silence warning about loss of precision. 
llvm-svn: 45731
 2008-01-08 00:52:29 +00:00
Evan Cheng
9de4f35e9f Only mark instructions that load a single value without extension as isSimpleLoad = 1. 
llvm-svn: 45727
 2008-01-07 23:56:57 +00:00