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Author SHA1 Message Date
Jakob Stoklund Olesen
bb30dd40ed Minimize the slot indexes spanned by register ranges created when splitting. 
When an interfering live range ends at a dead slot index between two
instructions, make sure that the inserted copy instruction gets a slot index
after the dead ones. This makes it possible to avoid the interference.

Ideally, there shouldn't be interference ending at a deleted instruction, but
physical register coalescing can sometimes do that to sub-registers.

This fixes PR9823.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130687 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-02 05:29:58 +00:00
Rafael Espindola
5426a9ee37 GCC uses a different encoding of pointers in the FDE when using 
-fno-dwarf2-cfi-asm. Implement the same behavior.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130637 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-01 04:49:54 +00:00
Jakob Stoklund Olesen
ec7e4fff96 When a physreg is live-in and live through a basic block, make sure its live 
range covers the entire block.

The live range can't be terminated at a random instruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130619 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 19:12:33 +00:00
Jakob Stoklund Olesen
6ee56e658a Avoid using stale entries form the sibling value map. 
This could happen when trying to use a value that had been eliminated after dead
code elimination and folding loads.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130597 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 06:42:21 +00:00
Jakob Stoklund Olesen
66446c803a Use hysteresis for local live range splitting as well. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130596 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 05:07:46 +00:00
Rafael Espindola
f1a5c7ec04 Add all the plumbing needed for MC to expand cfi to the old tables in 
the final assembly. It is the same technique used when targeting
assemblers that don't support .loc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130587 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 03:44:37 +00:00
Jakob Stoklund Olesen
141f529baf Update comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130582 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 03:13:08 +00:00
Jakob Stoklund Olesen
5aa3211e2d Use a greedy algorithm for allocating registers. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130568 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 01:37:54 +00:00
Bill Wendling
d65ba721cc Print out the 'nontemporal' info on a store. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130562 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 23:45:22 +00:00
Eli Friedman
b2b03fc2fa Make FastEmit_ri_ try a bit harder to succeed for supported operations; FastEmit_i can fail for non-Thumb2 ARM. Makes ARMSimplifyAddress work correctly, and reduces the number of fast-isel bailouts on non-Thumb ARM. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130560 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 23:34:52 +00:00
Devang Patel
49a3ff9d17 Hoist MCLineEntry construction AsmPrinter so that anyone who derives from AsmPrinter can have line number entries. 
PR 9810



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130518 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 18:00:54 +00:00
Rafael Espindola
ac3ba1b27e The last hack for producing bit identical output with cfi on OS X. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130504 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 15:09:53 +00:00
Rafael Espindola
7b11a4cbdc Change DwarfCFIException's member variables to track what it actually 
emmits: .cfi_personality, .cfi_lsda and the moves.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130503 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 14:48:51 +00:00
Rafael Espindola
a432997745 Factor some code to needsCFIMoves. Avoid printing moves when we don't have to. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130501 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 14:14:06 +00:00
Devang Patel
c26f5447e3 Teach dwarf writer to handle complex address expression for .debug_loc entries. 
This fixes clang generated blocks' variables' debug info.
Radar 9279956.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130373 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-28 02:22:40 +00:00
Eli Friedman
bd1253809b Fix a silly mistake in r130338. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130360 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-28 00:42:03 +00:00
Rafael Espindola
60246a9622 Remove unnecessary argument. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130343 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-27 23:17:57 +00:00
Rafael Espindola
7afec9cc0f Rename getPersonalityPICSymbol to getCFIPersonalitySymbol, document it, and 
give it a bit more responsibility. Also implement it for MachO.

If hacked to use cfi, 32 bit MachO will produce

.cfi_personality 155, L___gxx_personality_v0$non_lazy_ptr

and 64 bit will produce

.cfi_presonality ___gxx_personality_v0

The general idea is that .cfi_personality gets passed the final symbol. It is
up to codegen to produce it if using indirect representation (like 32 bit
MachO), but it is up to MC to decide which relocations to create.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130341 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-27 23:08:15 +00:00
Devang Patel
e1cdf84ee5 Simplify handling of variables with complex address (i.e. blocks variables) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130339 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-27 22:45:24 +00:00
Eli Friedman
2790ba8e5a Make the fast-isel code for literal 0.0 a bit shorter/faster, since 0.0 is common. rdar://problem/9303592 . 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130338 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-27 22:41:55 +00:00
Eli Friedman
161b887506 Remove unused function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130337 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-27 22:21:02 +00:00
Rafael Espindola
018e38c6dd Fix indentation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130331 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-27 21:29:52 +00:00
Devang Patel
0be77dff11 Revert r130178. It turned out to be not the optimal path to emit complex location expressions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130326 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-27 20:29:27 +00:00
Evan Cheng
309db7c947 If converter was being too cute. It look for root BBs (which don't have 
successors) and use inverse depth first search to traverse the BBs. However
that doesn't work when the CFG has infinite loops. Simply do a linear
traversal of all BBs work just fine.

rdar://9344645


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130324 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-27 19:32:43 +00:00
Jakob Stoklund Olesen
93e110ba34 Also add <imp-def> operands for defined and dead super-registers when rewriting. 
We cannot rely on the <imp-def> operands added by LiveIntervals in all cases as
demonstrated by the test case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130313 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-27 17:42:31 +00:00
Jakob Stoklund Olesen
9f4b893b84 Add a safe-guard against repeated splitting for some rare cases. 
The number of blocks covered by a live range must be strictly decreasing when
splitting, otherwise we can't allow repeated splitting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130249 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-26 22:33:12 +00:00
Evan Cheng
554daa67bd Be careful about scheduling nodes above previous calls. It increase usages of 
more callee-saved registers and introduce copies. Only allows it if scheduling
a node above calls would end up lessen register pressure.

Call operands also has added ABI restrictions for register allocation, so be
extra careful with hoisting them above calls.

rdar://9329627


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130245 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-26 21:31:35 +00:00
Rafael Espindola
fea8fea583 Print the label if we will use it in debug_frame. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130232 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-26 19:26:53 +00:00
Devang Patel
116da2fbe9 Refactor code. Keep dwarf register operation selection logic at one place. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130231 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-26 19:06:18 +00:00
Jakob Stoklund Olesen
1394e6d925 Use the new TRI->getLargestLegalSuperClass hook to constrain register class inflation. 
This has two effects: 1. We never inflate to a larger register class than what
the sub-target can handle. 2. Completely unconstrained virtual registers get the
largest possible register class.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130229 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-26 18:52:36 +00:00
Dan Gohman
a61e73bda5 Fast-isel support for simple inline asms. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130205 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-26 17:18:34 +00:00
Chris Lattner
bffc2b4af1 don't emit the symbol name twice for local bss and common 
symbols.  For example, don't emit:
        .comm   _i,4,2                  ## @i
                                        ## @i

instead emit:
        .comm   _i,4,2                  ## @i



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130192 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-26 06:14:13 +00:00
Evan Cheng
b16d06f88a Fix typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130190 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-26 04:57:37 +00:00
Rafael Espindola
b28d4f152e Print all the moves at a given label instead of just the first one. 
Remove previous DwarfCFI hack.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130187 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-26 03:58:56 +00:00
Devang Patel
0c99861836 Let dwarf writer allocate extra space in the debug location expression. This space, if requested, will be used for complex addresses of the Blocks' variables. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130178 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-26 00:12:46 +00:00
Devang Patel
9341d10f94 Rename a local variable. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130171 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-25 23:05:21 +00:00
Devang Patel
b865d46d95 Rename a method to match what it really does. 
s/addVariableAddress/addFrameVariableAddress/g


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130170 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-25 23:02:17 +00:00
Devang Patel
80925f5dca Do not drop a variable's complex address if it is not based on frame base. 
Observed this while reading code, so I do not have a test case handy here.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130167 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-25 22:52:55 +00:00
Devang Patel
06104e3743 A dbg.declare may not be in entry block, even if it is referring to an incoming argument. However, It is appropriate to emit DBG_VALUE referring to this incoming argument in entry block in MachineFunction. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130129 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-25 16:33:52 +00:00
Rafael Espindola
e54e785be5 Simplify the logic. Noticed by aKor. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130116 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-24 19:55:34 +00:00
Rafael Espindola
7ed6732447 Synchronize the conditions for producing a .cfi_startproc and a .cfi_endproc. 
Fixes PR9787.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130115 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-24 19:00:34 +00:00
Sebastian Redl
6796e4fc88 Give SplitKit.h a header guard. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130095 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-24 15:46:51 +00:00
Jay Foad
ddcdcc8863 Remove unused STL header includes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130068 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-23 19:53:52 +00:00
Owen Anderson
d74ea775af Teach FastISel to deal with instructions that have two immediate operands. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130033 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-22 23:38:06 +00:00
Devang Patel
5e06bb83f4 Let front-end tie subprogram declaration with subprogram definition directly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130028 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-22 23:10:17 +00:00
Jakob Stoklund Olesen
200729882a Always compare the cost of region splitting with the cost of per-block splitting. 
Sometimes it is better to split per block, and we missed those cases.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130025 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-22 22:47:40 +00:00
Chris Lattner
b686af053e Recommit the fix for rdar://9289512 with a couple tweaks to 
fix bugs exposed by the gcc dejagnu testsuite:
1. The load may actually be used by a dead instruction, which
   would cause an assert.
2. The load may not be used by the current chain of instructions,
   and we could move it past a side-effecting instruction. Change
   how we process uses to define the problem away.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130018 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-22 21:59:37 +00:00
Benjamin Kramer
e7cf062537 DAGCombine: fold "(zext x) == C" into "x == (trunc C)" if the trunc is lossless. 
On x86 this allows to fold a load into the cmp, greatly reducing register pressure.
  movzbl	(%rdi), %eax
  cmpl	$47, %eax
->
  cmpb	$47, (%rdi)

This shaves 8k off gcc.o on i386. I'll leave applying the patch in README.txt to Chris :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130005 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-22 18:47:44 +00:00
Devang Patel
eac0c9dc77 Do not leak argument's DbgVariables. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130004 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-22 18:09:57 +00:00
Evan Cheng
d8a1624122 Typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129970 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-22 01:40:20 +00:00