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Author SHA1 Message Date
Jakob Stoklund Olesen
ded2e3b0d0 LowerSubregsInstructionPass::LowerExtract should not extend the live range of registers. 
When LowerExtract eliminates an EXTRACT_SUBREG with a kill flag, it moves the
kill flag to the place where the sub-register is killed. This can accidentally
overlap with the use of a sibling sub-register, and we have trouble.

In the test case we have this code:

Live Ins: %R0 %R1 %R2
	%R2L<def> = EXTRACT_SUBREG %R2<kill>, 1
	%R2H<def> = LOAD16fi <fi#-1>, 0, Mem:LD(2,4) [FixedStack-1 + 0]
	%R1L<def> = EXTRACT_SUBREG %R1<kill>, 1
	%R0L<def> = EXTRACT_SUBREG %R0<kill>, 1
	%R0H<def> = ADD16 %R2H<kill>, %R2L<kill>, %AZ<imp-def>, %AN<imp-def>, %AC0<imp-def>, %V<imp-def>, %VS<imp-def>

subreg: CONVERTING: %R2L<def> = EXTRACT_SUBREG %R2<kill>, 1
subreg: eliminated!
subreg: killed here: %R0H<def> = ADD16 %R2H, %R2L, %R2<imp-use,kill>, %AZ<imp-def>, %AN<imp-def>, %AC0<imp-def>, %V<imp-def>, %VS<imp-def>

The kill flag on %R2 is moved to the last instruction, and the live range overlaps with the definition of %R2H:

*** Bad machine code: Redefining a live physical register ***
- function:    f
- basic block:  0x18358c0 (#0)
- instruction: %R2H<def> = LOAD16fi <fi#-1>, 0, Mem:LD(2,4) [FixedStack-1 + 0]
Register R2H was defined but already live.

The fix is to replace EXTRACT_SUBREG with IMPLICIT_DEF instead of eliminating
it completely:

subreg: CONVERTING: %R2L<def> = EXTRACT_SUBREG %R2<kill>, 1
subreg: replace by: %R2L<def> = IMPLICIT_DEF %R2<kill>

Note that these IMPLICIT_DEF instructions survive to the asm output. It is
necessary to fix the stack-color-with-reg test case because of that.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78093 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 20:01:11 +00:00
Jakob Stoklund Olesen
d37bc5a27b Enforce stricter rules in machine code verifier. 
Implicit operands no longer get a free pass: Imp-use requires a live register
and imp-def requires a dead register.

There is also no special rule allowing redefinition of a sub-register when the
super-register is live. The super register must have imp-kill+imp-def operands
instead.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78090 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 19:18:01 +00:00
Jakob Stoklund Olesen
71d342e854 Most flags are reserved registers on Blackfin. 
The only exception is CC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78089 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 19:16:55 +00:00
Evan Cheng
3425df44b5 In thumb mode, r7 is used as frame register. This fixes pr4681. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78086 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 18:46:17 +00:00
David Goodwin
b84f3d427c Match common pattern for FNMAC. Add NEON SP support. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78085 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 18:44:29 +00:00
David Goodwin
831b500ec1 Improve tests. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78083 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 18:11:59 +00:00
Sanjiv Gupta
ada097a853 Legalize i64 store operations generated by inst-combine. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78082 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 17:59:16 +00:00
David Goodwin
42a83f2d15 Initial support for single-precision FP using NEON. Added "neonfp" attribute to enable. Added patterns for some binary FP operations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78081 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 17:53:06 +00:00
Douglas Gregor
c7a6da6e14 Add some type traits that are used for Clang's statically-checked 
canonical types.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78076 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 17:04:52 +00:00
Evan Cheng
7d35249e89 Fix PR4528. This scavenger assertion is too strict. The two-address value is 
killed by another operand.

There is probably a better fix. Either 1) scavenger can look at other operands, or
2) livevariables can be smarter about kill markers. Patches welcome.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78072 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 16:52:44 +00:00
Daniel Dunbar
7145e9be64 Avoid compiler warning (in -Asserts mode) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78070 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 16:46:12 +00:00
Chris Lattner
ec409759e9 enhance codegen to put 16-bit character strings into the 
__TEXT,__ustring section on darwin.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78068 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 16:27:13 +00:00
Chris Lattner
7e88a50428 fix a fixme: don't create an explicit "CStringSection" for ELF, 
it is just being used as a prefix, so forward substitute it directly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78067 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 16:19:50 +00:00
Chris Lattner
1850e5add1 Add support emiting for 2/4 byte mergable strings to the ".rodata.str*" 
section on ELF targets.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78066 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 16:13:09 +00:00
Misha Brukman
0307a76def * Use "svn export" instead of "svn co" and avoid cleaning up .svn dirs 
* Use "svn info" to get last revision in repo, will get matching tarballs
* Now run "svn -q" since "svn info" tells us the revision number


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78065 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 15:47:18 +00:00
Anton Korobeynikov
939ba32747 Ooops, I was too fast to commit the wrong fix :( 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78060 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 11:18:31 +00:00
Anton Korobeynikov
20e037a8c5 Fix a typo - this unbreaks llvm-gcc build on arm 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78059 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 11:12:51 +00:00
Evan Cheng
eb084d1671 Thumb2 does not have ib (increment before) and da (decrement after) forms of ldm / stm. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78057 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 08:34:18 +00:00
Devang Patel
d5ac40457b Use separate ValueList for metadata. 
This fixes PR4666.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78056 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 06:00:18 +00:00
Chris Lattner
3b24c01720 make MergeableCString be a SectionKind "abstract class", and 
add new concrete versions for 1/2/4-byte mergable strings.

These are not actually created yet.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78055 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 05:35:56 +00:00
Edward O'Callaghan
37442b77d8 Minor www site formating improvements. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78054 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 05:24:28 +00:00
Devang Patel
912538beca Revert recent bitcode writer patches. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78053 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 05:01:35 +00:00
Bill Wendling
27d703b30f llvm-gcc checks the static asm variable is valid in ValidateRegisterVariable. Make this work for PPC. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78051 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 04:48:31 +00:00
Chris Lattner
0a0193edf9 switch ValueMap to using AssertingVH. This is an old patch I had laying 
around in a tree I forgot about.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78048 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 04:31:02 +00:00
Daniel Dunbar
4b3d57228c No really, it's unused. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78047 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 04:08:40 +00:00
Daniel Dunbar
a277f4e33d Remove unused function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78046 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 04:04:25 +00:00
Daniel Dunbar
214e22396f Remove now unused Module argument to createTargetMachine. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78043 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 04:02:45 +00:00
Bill Wendling
2822e174f6 Fixed now. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78042 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 03:46:54 +00:00
Rafael Espindola
c4f8861af3 Add test for PR4678 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78040 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 03:44:37 +00:00
Bill Wendling
d9a05eb97e XFAIL for the moment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78038 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 03:40:47 +00:00
Devang Patel
13ed1e2936 Remove dead code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78035 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 02:54:15 +00:00
Devang Patel
2453c40145 Fix MDString Abbrev setup. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78034 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 02:36:39 +00:00
Devang Patel
d701aa7bed Constants and Metadata share ValueList. This means they must be emitted interleaved (using appropriate BLOCK_IDs) otherwise ValuePtrs index gets out of sync. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78033 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 02:26:56 +00:00
Evan Cheng
f0409ea488 Remove ARM specific getInlineAsmLength. We'll rely on the simpler (and faster) generic algorithm for now. If more accurate computation is needed, we'll rely on the disassembler. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78032 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 01:56:09 +00:00
Evan Cheng
27934da97b Load / store multiple pass fixes for Thumb2. Not enabled yet. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78031 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 01:43:45 +00:00
Evan Cheng
fa2ea1a8cf Emit sub r, #c instead of transforming it to add r, #-c if c fits in 8-bit. This is a bit of pre-mature optimization. 8-bit variant makes it likely it will be narrowed to a 16-bit instruction. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78030 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 01:41:15 +00:00
Bob Wilson
a599bff101 Lower Neon VLD* intrinsics to custom DAG nodes, and manually allocate the 
results to fixed registers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78025 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 00:36:16 +00:00
Bob Wilson
916afdbc2d Minor cleanup. No functional changes intended. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78024 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 00:25:01 +00:00
Dan Gohman
206ad10c14 Propogate the Depth argument when calling 
TLI.computeMaskedBitsForTargetNode from ComputeMaskedBits, since
the former may call back into the latter. This fixes a major
compile time problem on a testcase that happnened to hit this
in a particularly bad way, PR4643.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78023 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-04 00:24:42 +00:00
Ted Kremenek
f6e75c3435 Update CMake files. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78020 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-03 23:44:01 +00:00
Chris Lattner
290c2f56ce eliminate CurrentSection, rename CurrentSection_ -> CurrentSection, make it private, 
eliminate IsInTextSection.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78017 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-03 23:20:21 +00:00
Chris Lattner
c6fdced3db Kill off SwitchToDataSection and SwitchToTextSection, woo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78015 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-03 23:10:34 +00:00
Chris Lattner
7b59e2493d remove an unneeded section switch. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78014 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-03 23:02:45 +00:00
Chris Lattner
2dfddee396 switch ppc to using SwitchToSection instead of textual section stuff. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78013 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-03 22:52:21 +00:00
Devang Patel
4771e16fa9 Keep track of metadata used by other metadata. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78012 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-03 22:51:10 +00:00
Chris Lattner
5e44e472d6 use TLOF to compute the section for a function instead of 
replicating the logic manually.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78011 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-03 22:32:50 +00:00
Dan Gohman
5544c6cad8 Minor whitespace fix, so this doesn't look like a unary *. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78010 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-03 22:30:18 +00:00
Dan Gohman
8bb9c92892 Add -disable-output. Thanks Bill! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78009 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-03 22:24:22 +00:00
Chris Lattner
f61159b574 convert macho stub emission to use SwitchToSection instead of 
textual sections.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78007 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-03 22:18:15 +00:00
Chris Lattner
865aaf00ad hoist some common code out of a switch 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78006 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-03 22:16:57 +00:00