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22947 Commits

Author SHA1 Message Date
Dale Johannesen
da30ccbe9a change comments per review 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50300 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-25 21:16:07 +00:00
Evan Cheng
44c0fd17e1 Extract the lower 64-bit if a MMX value is passed in a XMM register. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50292 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-25 20:13:28 +00:00
Evan Cheng
082948df9b Fix illegal MMX_MOVDQ2Qrr pattern. vector_extract result must be a scalar value. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50291 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-25 20:12:46 +00:00
Evan Cheng
10e864276b Special handling for MMX values being passed in either GPR64 or lower 64-bits of XMM registers. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50289 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-25 19:11:04 +00:00
Dan Gohman
23ce502cb7 Remove the code from CodeGenPrepare that moved getresult instructions 
to the block that defines their operands. This doesn't work in the
case that the operand is an invoke, because invoke is a terminator
and must be the last instruction in a block.

Replace it with support in SelectionDAGISel for copying struct values
into sequences of virtual registers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50279 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-25 18:27:55 +00:00
Evan Cheng
80f5404e18 Fix MMX_MOVQ2DQrr pattern. It's illegal to do a bitconvert from a smaller type to a larger one. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50278 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-25 18:19:54 +00:00
Nate Begeman
6867991d54 Pull the code to perform an INSERT_VECTOR_ELT in memory out into its own 
function, and then use it to fix a bug in SplitVectorOp that expected inserts
to always have constant insertion indices.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50273 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-25 18:07:40 +00:00
Nate Begeman
4182db4327 Feedback from chris 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50271 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-25 17:45:52 +00:00
Chris Lattner
7c400dcb03 add a note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50267 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-25 17:25:00 +00:00
Evan Cheng
682f81032f 80 col violation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50266 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-25 17:21:40 +00:00
Nick Lewycky
280a6e607d Remove 'unwinds to' support from mainline. This patch undoes r47802 r47989 
r48047 r48084 r48085 r48086 r48088 r48096 r48099 r48109 and r48123.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50265 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-25 16:53:59 +00:00
Evan Cheng
419ace9bda Not checking for intrinsics which do not have a chain operand. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50260 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-25 08:55:28 +00:00
Evan Cheng
cdda25d22b - Switch from std::set to SmallPtrSet. 
- Add comments.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50259 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-25 08:22:20 +00:00
Evan Cheng
ee472b1081 MMX argument passing fixes: 
On Darwin / Linux x86-32, v8i8, v4i16, v2i32 values are passed in MM[0-2].                                                                                                                                      
On Darwin / Linux x86-32, v1i64 values are passed in memory.                                                                                                                                                    
On Darwin x86-64, v8i8, v4i16, v2i32 values are passed in XMM[0-7].                                                                                                                                     
On Darwin x86-64, v1i64 values are passed in 64-bit GPRs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50257 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-25 07:56:45 +00:00
Nate Begeman
4be30ac0e2 Teach the PruningFunctionCloner how to look through loads with 
ConstantExpression GEPs pointing into constant globals.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50256 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-25 06:37:06 +00:00
Chris Lattner
25453ea49e Loosen up an assertion to allow intrinsics. I really have no 
idea what this code (findNonImmUse) does, so I'm only guessing 
that this is the right thing.  It would be really really nice
if this had comments and perhaps switched to SmallPtrSet
(hint hint) :)

This fixes rdar://5886601, a crash on gcc.target/i386/sse4_1-pblendw.c


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50252 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-25 05:13:01 +00:00
Chris Lattner
eede65ce6c Don't infininitely thread branches when a threaded edge 
goes back to the block, e.g.:

  Threading edge through bool from 'bb37.us.thread3829' to 'bb37.us' with cost: 1, across block:

bb37.us:		; preds = %bb37.us.thread3829, %bb37.us, %bb33
	%D1361.1.us = phi i32 [ %tmp36, %bb33 ], [ %D1361.1.us, %bb37.us ], [ 0, %bb37.us.thread3829 ]		; <i32> [#uses=2]
	%tmp39.us = icmp eq i32 %D1361.1.us, 0		; <i1> [#uses=1]
	br i1 %tmp39.us, label %bb37.us, label %bb42.us



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50251 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-25 04:12:29 +00:00
Gordon Henriksen
2566388bc4 PR2202: LLVMCreateInterpreter creates a JIT 
Applying fix by Frits van Bommel.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50249 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-25 02:52:30 +00:00
Evan Cheng
2749c72f30 Fix bug in x86 memcpy / memset lowering. If there are trailing bytes not handled by rep instructions, a new memcpy / memset is introduced for them. However, since source / destination addresses are already adjusted, their offsets should be zero. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50239 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-25 00:26:43 +00:00
Evan Cheng
79328661fa Adjust inline cost computation to be less aggressive. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50222 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-24 18:42:47 +00:00
Evan Cheng
a971dbdde2 - Check if a register is livein before removing it. It may have already been removed. 
- Do not iterate over SmallPtrSet, the order of iteration is not deterministic.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50209 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-24 09:06:33 +00:00
Chris Lattner
eb5f4092d9 code restructuring, not functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50203 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-24 00:21:50 +00:00
Chris Lattner
7cb22ecf22 Don't replace multiple result of calls with undef, 
sccp tracks getresult values, not call values in this
case.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50202 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-24 00:19:54 +00:00
Chris Lattner
f4023a1ef6 code cleanup, no functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50201 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-24 00:16:28 +00:00
Chris Lattner
c9e495c534 Split some code out of the main SimplifyCFG loop into its own function. 
Fix said code to handle merging return instructions together correctly
when handling multiple return values.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50199 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-24 00:01:19 +00:00
Dan Gohman
3c02aca238 Make these variables static. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50196 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 23:15:23 +00:00
Anton Korobeynikov
0d9e02cfd6 Drop dead includes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50192 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 22:44:03 +00:00
Anton Korobeynikov
8d3e74ed49 Adjust option names for C++ backend 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50190 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 22:37:03 +00:00
Anton Korobeynikov
5027652b8a First step of implementing PR1538: move llvm2cpp logic to new 'target' 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50189 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 22:29:24 +00:00
Dan Gohman
7661279ae0 Initial CBE support for multiple return values. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50187 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 21:49:29 +00:00
Chris Lattner
80b8f5dd6b tighten up verifier checks which missed cases where 
return instrs operands didn't match up with function results.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50182 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 20:33:41 +00:00
Dan Gohman
67780f108c Use isa instead of dyn_cast. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50181 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 20:25:16 +00:00
Dan Gohman
3dc34f682d Add support to codegen for getresult instructions with undef operands. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50180 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 20:21:29 +00:00
Devang Patel
6829157f49 Check type instead of no. of operands. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50179 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 20:18:29 +00:00
Dan Gohman
9ac0ac5675 Allow llvm-as to parse a getresult with an undef operand. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50175 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 20:11:27 +00:00
Dale Johannesen
1f530a59f7 Rewrite previous patch to suit Chris's preference. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50174 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 18:34:37 +00:00
Anton Korobeynikov
b013f5094c Unbreak JIT 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50173 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 18:26:03 +00:00
Anton Korobeynikov
941ff5818b Fix typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50169 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 18:24:25 +00:00
Anton Korobeynikov
dc28bd43d3 Only allow increase of max alignment value 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50168 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 18:23:50 +00:00
Anton Korobeynikov
d52bdaff0c Be over-conservative: scan for all used virtual registers and calculate maximal stack alignment in assumption, that there will be spill of vector register. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50167 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 18:23:30 +00:00
Anton Korobeynikov
856914fe00 Add X86 Maximal Stack Alignment Calculator Pass before RA 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50166 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 18:23:05 +00:00
Anton Korobeynikov
769b481e9f Add facility for pre-RA passes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50165 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 18:22:28 +00:00
Anton Korobeynikov
aadc780a56 Use precomputed value, if any 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50164 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 18:21:50 +00:00
Anton Korobeynikov
2c430cbf03 Do proper book-keeping of offsets and prologue/epilogue code for stack realignment 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50163 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 18:21:27 +00:00
Anton Korobeynikov
8e91ec5e29 If stack realignment is used - incoming args will use EBP as base register and locals - ESP 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50162 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 18:21:02 +00:00
Anton Korobeynikov
b51dce3013 Eastimate required stack alignment early, so we can decide, whether we will need frame pointer or not 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50161 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 18:20:17 +00:00
Anton Korobeynikov
874384e20f Cleanup 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50160 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 18:19:47 +00:00
Anton Korobeynikov
d1c133a051 Cleanup 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50159 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 18:19:23 +00:00
Anton Korobeynikov
82751e3eda Simplify 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50158 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 18:18:36 +00:00
Anton Korobeynikov
45709ae09b Make stack alignment options global for all targets 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50157 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 18:18:10 +00:00
Anton Korobeynikov
cfcd20e7be Provide option for enabling-disabling stack realignment 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50156 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 18:17:11 +00:00
Anton Korobeynikov
35410a493b Disable stack realignment for functions with dynamic-sized alloca's 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50155 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 18:16:43 +00:00
Anton Korobeynikov
890fe888be Provide ABI-correct stack alignment 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50154 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 18:16:16 +00:00
Anton Korobeynikov
9bbbea568c Provide convenient helpers for some operations 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50153 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 18:15:48 +00:00
Anton Korobeynikov
e201190eb7 Whitespace cleanup 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50152 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 18:15:11 +00:00
Chris Lattner
4af6ad3789 simplify code for propagation of constant arguments into 
callees.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50142 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 06:16:27 +00:00
Chris Lattner
e9625c6c88 Fix a number of bugs in ipconstantprop, simplify the code, fit in 80 cols, 
fix read after free bug (PR2238).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50141 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 05:59:23 +00:00
Chris Lattner
c6ee00b8ee Rewrite multiple return value handling in SCCP. Before, the -sccp pass 
would turn every getresult instruction into undef.  This helps with
rdar://5778210


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50140 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 05:38:20 +00:00
Chris Lattner
a925a14698 regenerate 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50139 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 05:37:08 +00:00
Chris Lattner
f7dedf2d85 Validate that the result of a function type is valid using shared 
logic with vmcore.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50138 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 05:36:58 +00:00
Chris Lattner
d52b62ae05 Enforce that multiple return values have to have at least one result. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50137 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 05:36:34 +00:00
Chris Lattner
42369b7e4b Verify that the operand of a getresult instruction is a 
call/invoke or undef.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50129 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 04:06:15 +00:00
Dale Johannesen
63e7eb4e12 Do not change the type of a ByVal argument to a 
type of a different size.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50121 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 01:03:05 +00:00
Evan Cheng
f30752cbcc Don't do: "(X & 4) >> 1 == 2 --> (X & 4) == 4" if there are more than one uses of the shift result. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50118 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-23 00:38:06 +00:00
Chris Lattner
a5ddb59a13 Start doing the significantly useful part of jump threading: handle cases 
where a comparison has a phi input and that phi is a constant.  For example,
stuff like:

  Threading edge through bool from 'bb2149' to 'bb2231' with cost: 1, across block:
bb2237:		; preds = %bb2231, %bb2149
	%tmp2328.rle = phi i32 [ %tmp2232, %bb2231 ], [ %tmp2232439, %bb2149 ]		; <i32> [#uses=2]
	%done.0 = phi i32 [ %done.2, %bb2231 ], [ 0, %bb2149 ]		; <i32> [#uses=1]
	%tmp2239 = icmp eq i32 %done.0, 0		; <i1> [#uses=1]
	br i1 %tmp2239, label %bb2231, label %bb2327

or

bb38.i298:		; preds = %bb33.i295, %bb1693
	%tmp39.i296.rle = phi %struct.ibox* [ null, %bb1693 ], [ %tmp39.i296.rle1109, %bb33.i295 ]		; <%struct.ibox*> [#uses=2]
	%minspan.1.i291.reg2mem.1 = phi i32 [ 32000, %bb1693 ], [ %minspan.0.i288, %bb33.i295 ]		; <i32> [#uses=1]
	%tmp40.i297 = icmp eq %struct.ibox* %tmp39.i296.rle, null		; <i1> [#uses=1]
	br i1 %tmp40.i297, label %implfeeds.exit311, label %bb43.i301

This triggers thousands of times in spec.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50110 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-22 21:40:39 +00:00
Chris Lattner
ae65b3c791 Dig through multiple levels of AND to thread jumps if needed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50106 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-22 20:46:09 +00:00
Chris Lattner
6bf77500c6 Teach jump threading to thread through blocks like: 
br (and X, phi(Y, Z, false)), label L1, label L2

This triggers once on 252.eon and 6 times on 176.gcc.  Blocks 
in question often look like this:

bb262:		; preds = %bb261, %bb248
	%iftmp.251.0 = phi i1 [ true, %bb261 ], [ false, %bb248 ]		; <i1> [#uses=4]
	%tmp270 = icmp eq %struct.rtx_def* %tmp.0.i, null		; <i1> [#uses=1]
	%bothcond = or i1 %iftmp.251.0, %tmp270		; <i1> [#uses=1]
	br i1 %bothcond, label %bb288, label %bb273

In this case, it is clear that it doesn't matter if tmp.0.i is null when coming from bb261.  When coming from bb248, it is all that matters.


Another random example:

check_asm_operands.exit:		; preds = %check_asm_operands.exit.thr_comm, %bb30.i, %bb12.i, %bb6.i413
	%tmp.0.i420 = phi i1 [ true, %bb6.i413 ], [ true, %bb12.i ], [ true, %bb30.i ], [ false, %check_asm_operands.exit.thr_comm ; <i1> [#uses=1]
	call void @llvm.stackrestore( i8* %savedstack ) nounwind 
	%tmp4389 = icmp eq i32 %added_sets_1.0, 0		; <i1> [#uses=1]
	%tmp4394 = icmp eq i32 %added_sets_2.0, 0		; <i1> [#uses=1]
	%bothcond80 = and i1 %tmp4389, %tmp4394		; <i1> [#uses=1]
	%bothcond81 = and i1 %bothcond80, %tmp.0.i420		; <i1> [#uses=1]
	br i1 %bothcond81, label %bb4398, label %bb4397

Here is the case from 252.eon:

bb290.i.i:		; preds = %bb23.i57.i.i, %bb8.i39.i.i, %bb100.i.i, %bb100.i.i, %bb85.i.i110
	%myEOF.1.i.i = phi i1 [ true, %bb100.i.i ], [ true, %bb100.i.i ], [ true, %bb85.i.i110 ], [ true, %bb8.i39.i.i ], [ false, %bb23.i57.i.i ]		; <i1> [#uses=2]
	%i.4.i.i = phi i32 [ %i.1.i.i, %bb85.i.i110 ], [ %i.0.i.i, %bb100.i.i ], [ %i.0.i.i, %bb100.i.i ], [ %i.3.i.i, %bb8.i39.i.i ], [ %i.3.i.i, %bb23.i57.i.i ]		; <i32> [#uses=3]
	%tmp292.i.i = load i8* %tmp16.i.i100, align 1		; <i8> [#uses=1]
	%tmp293.not.i.i = icmp ne i8 %tmp292.i.i, 0		; <i1> [#uses=1]
	%bothcond.i.i = and i1 %tmp293.not.i.i, %myEOF.1.i.i		; <i1> [#uses=1]
	br i1 %bothcond.i.i, label %bb202.i.i, label %bb301.i.i
  Factoring out 3 common predecessors.

On the path from any blocks other than bb23.i57.i.i, the load and compare 
are dead.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50096 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-22 07:05:46 +00:00
Chris Lattner
d38c14e6ed refactor some code, no functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50094 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-22 06:36:15 +00:00
Chris Lattner
9d4b94d3e1 remove dead code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50080 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-22 03:21:48 +00:00
Chris Lattner
10c0d9179e optimize "p != gep p, ..." better. This allows us to compile 
getelementptr-seteq.ll into:

define i1 @test(i64 %X, %S* %P) {
	%C = icmp eq i64 %X, -1		; <i1> [#uses=1]
	ret i1 %C
}

instead of:

define i1 @test(i64 %X, %S* %P) {
	%A.idx.mask = and i64 %X, 4611686018427387903		; <i64> [#uses=1]
	%C = icmp eq i64 %A.idx.mask, 4611686018427387903		; <i1> [#uses=1]
	ret i1 %C
}

And fixes the second half of PR2235.  This speeds up the insertion sort
case by 45%, from 1.12s to 0.77s.  In practice, this will significantly
speed up for loops structured like:

for (double *P = Base + N; P != Base; --P)
  ...

Which happens frequently for C++ iterators.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50079 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-22 02:53:33 +00:00
Chris Lattner
eb411291fa more fallout from Nicholas' asmprinter patch. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50078 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-22 02:45:44 +00:00
Dan Gohman
61a9213440 Implement an x86-64 ABI detail of passing structs by hidden first 
argument. The x86-64 ABI requires the incoming value of %rdi to
be copied to %rax on exit from a function that is returning a
large C struct.

Also, add a README-X86-64 entry detailing the missed optimization
opportunity and proposing an alternative approach.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50075 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 23:59:07 +00:00
Dan Gohman
639cdc210b Fix an out-of-bounds access in -view-sunit-dags in the case of an 
empty ScheduleDAG.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50054 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 20:07:30 +00:00
Dan Gohman
0416b0a26d Fix the encoding of the MMX movd that moves from MMX to 64-bit GPR. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50053 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 19:52:29 +00:00
Dan Gohman
92c7b65c91 Fix the way AliasSet::print prints "may alias". 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50051 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 19:48:48 +00:00
Chris Lattner
037c781de7 fix grammar-o, thanks to Duncan for noticing. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50047 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 18:25:01 +00:00
Owen Anderson
4bda6e47e9 Remove unneeded #include's. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50035 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 07:47:38 +00:00
Owen Anderson
a8bd65835b Refactor memcpyopt based on Chris' suggestions. Consolidate several functions 
and simplify code that was fallout from the separation of memcpyopt and gvn.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50034 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 07:45:10 +00:00
Duncan Sands
e47d98200e Fix a "large integer implicitly truncated to unsigned type" 
warning.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50033 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 07:35:28 +00:00
Chris Lattner
ea705199af don't print dominators every time it is computed with -debug. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50032 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 06:19:02 +00:00
Chris Lattner
a1b5858fda another bug introduced in r47802 by nicholas, for no apparent reason. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50031 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 06:12:55 +00:00
Chris Lattner
7d717a0b70 Add an ugly note. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50029 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 04:46:30 +00:00
Chris Lattner
96c5b2f8c7 fix a bug introduced by Nicholas' "unwinds to" stuff: we 
lost newlines between blocks.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50024 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 04:20:33 +00:00
Chris Lattner
281def9456 don't assume that the argument passed to fprintf("%s" is a string. This 
fixes a crash in opt on 433.milc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50023 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 03:18:33 +00:00
Chris Lattner
2cc675180b Use the new SplitBlockPredecessors to implement a todo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50022 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 02:57:57 +00:00
Chris Lattner
54b9c3ba2a Move SplitBlockPredecessors out of loopsimplify into BasicBlockUtils.h 
as a global helper function.  At the same type, switch it from taking
a vector of predecessors to an arbitrary sequential input.  This allows
us to switch LoopSimplify to use a SmallVector for various temporary
vectors that it passed into SplitBlockPredecessors.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50020 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 01:28:02 +00:00
Chris Lattner
1b58678d54 Move domtree/frontier updating earlier, allowing us to use it to update phi 
nodes, removing a hack.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50019 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 01:05:08 +00:00
Chris Lattner
b85979434d Factor dominator tree and frontier updating into SplitBlockPredecessors 
instead of doing it after every call.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50018 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 00:54:38 +00:00
Chris Lattner
48a80b07bd fit some more code in 80 cols. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50016 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 00:25:49 +00:00
Chris Lattner
34093a634a simplify code, fit in 80 cols. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50015 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 00:23:14 +00:00
Chris Lattner
862f27ebab fit in 80 cols 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50014 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 00:19:16 +00:00
Nicolas Geoffray
580631a73a Be pessimistic in computing the buffer size when aligning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50008 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 23:39:44 +00:00
Nicolas Geoffray
546e36a2c1 Don't forget to update the current operand when getting the size of an instruction. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50007 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 23:36:47 +00:00
Chris Lattner
bd3401fa98 finish the first cut of a jump threading pass implementation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50006 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 22:39:42 +00:00
Chris Lattner
0cfe85be0b replace a slow and verbose version of Instruction::isUsedOutsideOfBlock with 
a call to Instruction::isUsedOutsideOfBlock.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50005 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 22:18:22 +00:00
Chris Lattner
7ae40e7d8a add a handy helper method to instruction, useful for determining 
whether it is used outside of some block.  This can be used to see
if there are any non-local references, for example.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50004 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 22:11:30 +00:00
Chris Lattner
f9065a904f we can only thread blocks when there is a pred we can determine the succ of. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50003 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 21:18:09 +00:00
Chris Lattner
177480b7ed improve comments, infrastructure, and add some validity checks for threading. 
Add a cost function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50002 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 21:13:06 +00:00
Chris Lattner
8383a7b7a6 Add a new Jump Threading pass, which will handle cases 
such as those in PR2235.  Right now the pass is not very
effective. :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50000 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 20:35:01 +00:00
Chris Lattner
3e5d1d8d08 hopefully resolve PR2240 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49999 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 19:59:12 +00:00
Chris Lattner
0e4b6c7551 rearrange some code, simplify handling of shifts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49995 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 18:24:14 +00:00
Dale Johannesen
9dd2ce46c5 Check we aren't trying to convert PPC long double. 
This fixes the testsuite failure on ppcf128-4.ll.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49994 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 18:23:46 +00:00
Nicolas Geoffray
5913e6c5db Cosmetic changes, as suggested by Evan. No functionality changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49993 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 17:44:19 +00:00
Dale Johannesen
a0c8fc6f28 (re)fix handling of UGT. Pointed out by Nick Lewycky. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49991 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 16:58:57 +00:00
Torok Edwin
3eaee31393 g++-4.3 build-fix: CHAR_BIT requires <climits>. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49989 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 08:33:11 +00:00
Nicolas Geoffray
fd7d99120b Do not hold the JIT lock when materializing a function and verify if the 
function has already been codegen'd. This is required by the Java class loading
mechanism which executes Java code when materializing a function.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49988 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 08:33:02 +00:00
Chris Lattner
bd381a777b A better fix for my previous patch, MOVZQI2PQIrr just requires SSE2. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49986 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 05:52:46 +00:00
Dale Johannesen
79f82f9fd5 Check that APFloat::convert is not trying to target 
ppc long double, which doesn't work.

This may break some stuff temporarily, but I want to
avoid the propagation of code that assumes this works.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49983 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 01:34:03 +00:00
Chris Lattner
d8eb63fc72 regenerate 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49978 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 00:41:19 +00:00
Chris Lattner
02a260aa11 Switch to using Simplified ConstantFP::get API. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49977 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 00:41:09 +00:00
Chris Lattner
eb9c8e1e3f Use simplified ConstantFP::get method, fix a bug handling frem x, 0 with long doubles. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49976 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 00:26:06 +00:00
Chris Lattner
d881ad2c57 Implement PR2206. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49967 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 22:17:26 +00:00
Chris Lattner
1c14c29746 refactor handling of symbolic constant folding, picking up 
a few new cases( see Integer/a1.ll), but not anything that
would happen in practice.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49965 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 21:58:19 +00:00
Chris Lattner
61783d7322 indentation fix. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49964 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 21:13:00 +00:00
Chris Lattner
bcd203cf86 Allow argpromote to promote struct arguments with a specified number 
of elements.  Patch by Matthijs Kooijman!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49962 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 19:50:01 +00:00
Evan Cheng
8608f2eff2 64-bit atomic operations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49949 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 02:30:38 +00:00
Evan Cheng
94d7b02c5a Also LXCHG64 -> XCHG64rm. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49948 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 02:05:42 +00:00
Evan Cheng
54fc97dcdc PPC32 atomic operations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49947 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 01:30:48 +00:00
Evan Cheng
bb6939dcff xchg which references a memory operand does not need to lock prefix. Atomicity is guaranteed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49946 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 01:20:30 +00:00
Dan Gohman
f4423b1e45 Teach llvm-as to accept function types with multiple return types. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49945 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 00:24:39 +00:00
Dale Johannesen
cf363181c1 Fix a scalar evolution bug. Reversing everything 
does not work because of 0; 2>0 but -2U is also >0.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49928 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-18 21:38:31 +00:00
Nicolas Geoffray
dc17ab2bf0 Enable jitting with a known memory size. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49924 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-18 20:59:31 +00:00
Duncan Sands
37bcda3de9 Implement a bit more softfloat support in 
LegalizeTypes.  Correct the load logic so
that it actually works, and also teach it
to handle floating point extending loads.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49923 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-18 20:56:03 +00:00
Dan Gohman
28269139ee Fix the handling of va_copy on x86-64. As of llvm-gcc r49920 
llvm-gcc is now lowering va_copy on x86-64, so this completes
the fix for PR2230.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49922 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-18 20:55:41 +00:00
Evan Cheng
7e03280b53 - Fix atomic operation JIT encoding. 
- Remove unused instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49921 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-18 20:55:36 +00:00
Duncan Sands
4cc0456456 Add some more FIXME's for indexed loads and stores. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49916 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-18 20:27:12 +00:00
Duncan Sands
41edfb8ae1 Provide an explicit list of operands to MakeLibcall, 
rather than having it suck them out of a node.  Add
a bunch of new libcalls, and remove dead softfloat
code (dead, because FloatToInt is used not Expand
in this case).  Note that indexed stores probably
aren't handled properly, likewise for loads.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49915 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-18 20:25:14 +00:00
Evan Cheng
a8f720d695 Correct comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49913 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-18 19:25:26 +00:00
Evan Cheng
883d260045 Not safe to "kill" a register if its live range extends pass the end of block branch. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49911 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-18 19:22:23 +00:00
Evan Cheng
3f73beaeb2 Also support Intel asm syntax. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49878 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-17 23:35:10 +00:00
Dan Gohman
35b31bea0d Remove the implicit conversion from SDOperandPtr to SDOperand*; this 
may fix a build error on Visual Studio.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49876 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-17 23:02:12 +00:00
Evan Cheng
9d1a81a23c Fix assembly code for atomic operations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49869 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-17 21:26:35 +00:00
Evan Cheng
639f493ebf Be more careful with insert_subreg and extract_subreg where either source or destination operand has already been coalesced with another register that's defined by a insert_subreg or extract_subreg. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49843 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-17 07:58:04 +00:00
Owen Anderson
241f65321e Make GVN able to remove unnecessary calls to read-only functions again. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49842 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-17 05:36:50 +00:00
Bill Wendling
f231778269 Use correct name for method in comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49841 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-17 05:20:39 +00:00
Dan Gohman
499c1bd358 Correct the SrcValue information in the Expand code for va_copy. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49839 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-17 02:09:26 +00:00
Scott Michel
5788bca1c2 Remove unused variable 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49838 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-17 01:30:44 +00:00
Evan Cheng
621d157676 Fix a sub-register indice propagation bug. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49832 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-17 00:06:42 +00:00
Scott Michel
4bf393a13e Workaround for PR2207, in which pred_iterator assert gets triggered due to a 
wee problem in Xcode 2.[45]/gcc 4.0.1.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49831 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 23:46:39 +00:00
Evan Cheng
03eb38848c Don't forget about sub-register indices when rematting instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49830 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 23:44:44 +00:00
Dale Johannesen
5e8fb81353 Unbreak build on x86-64. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49822 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 22:24:33 +00:00
Nicolas Geoffray
51cc3c13ea Correlate stubs with functions in JIT: when emitting a stub, the JIT tells the memory manager which function 
the stub will resolve.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49814 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 20:46:05 +00:00
Evan Cheng
9c1e06e187 After reading memory that's already freed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49810 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 20:24:25 +00:00
Nicolas Geoffray
52e724ad7e Infrastructure for getting the machine code size of a function and an instruction. X86, PowerPC and ARM are implemented 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49809 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 20:10:13 +00:00
Evan Cheng
dc00858e11 Initialize X863DNowLevel. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49808 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 19:03:02 +00:00
Evan Cheng
ff7a3e557e Fix PR2226. Avoid using uninitialized variables. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49807 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 18:48:43 +00:00
Evan Cheng
76249966ee Empty basic block should have an empty range. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49800 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 18:01:08 +00:00
Dale Johannesen
48325f4b08 Don't read off end of the input array. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49799 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 17:31:41 +00:00
Roman Levenstein
9cac5259fe Ongoing work on improving the instruction selection infrastructure: 
Rename SDOperandImpl back to SDOperand.
Introduce the SDUse class that represents a use of the SDNode referred by
an SDOperand. Now it is more similar to Use/Value classes.

Patch is approved by Dan Gohman.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49795 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 16:15:27 +00:00
Evan Cheng
0d4bdde327 Rewrite LiveVariable liveness computation. The new implementation is much simplified. It eliminated the nasty recursive routines and removed the partial def / use bookkeeping. There is also potential for performance improvement by replacing the conservative handling of partial physical register definitions. The code is currently disabled until live interval analysis is taught of the name scheme. 
This patch also fixed a couple of nasty corner cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49784 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 09:46:40 +00:00