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148 Commits

Author SHA1 Message Date
Rafael Espindola
e840e88239 This commit introduces two fake instructions MORESTACK_RET and 
MORESTACK_RET_RESTORE_R10; which are lowered to a RET and a RET
followed by a MOV respectively.  Having a fake instruction prevents
the verifier from seeing a MachineBasicBlock end with a
non-terminator (MOV).  It also prevents the rather eccentric case of a
MachineBasicBlock ending with RET but having successors nevertheless.

Patch by Sanjoy Das.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143062 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-26 21:12:27 +00:00
Duncan Sands
17001ce25c Fix a bunch of unused variable warnings when doing a release 
build with gcc-4.6.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142350 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-18 12:44:00 +00:00
Bill Wendling
4e68054b20 More closely follow libgcc, which has code after the `ret' instruction to 
release the stack segment and reset the stack pointer. Place the code in its own
MBB to make the verifier happy.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141859 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-13 08:24:19 +00:00
Bill Wendling
82222c20be Should not add instructions to a BB after a return instruction. The machine instruction verifier doesn't like this, nor do I. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141856 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-13 07:42:32 +00:00
Jakob Stoklund Olesen
51f0c76419 Only run MF.verify() with EXPENSIVE_CHECKS=1. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140441 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-24 01:11:19 +00:00
Bill Wendling
c8725d11f8 Reenable compact unwind by default. However, also emit the old version of unwind 
information for older linkers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139206 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-06 23:47:14 +00:00
Bill Wendling
d199aa012b Revert r138826 until PR10834 can be fixed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139018 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-02 18:15:04 +00:00
Rafael Espindola
e81abfd30b Spelling and grammar fixes to problems found by Duncan. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138858 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-31 16:43:33 +00:00
Eli Friedman
ac86d43eae Make sure we don't crash when -miphoneos-version-min is specified on x86. Hopefully this will fix gcc testsuite failures. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138856 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-31 16:19:51 +00:00
Bill Wendling
e716124feb Fix off-by-one error Benjamin noticed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138832 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-30 21:23:24 +00:00
Bill Wendling
011a8e1684 Enable compact unwind info by default. This only applies to Darwin when CFI is 
disabled.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138826 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-30 20:54:11 +00:00
Rafael Espindola
76927d7586 Emit segmented-stack specific code into function prologues for 
X86. Modify the pass added in the previous patch to call this new
code.

This new prologues generated will call a libgcc routine (__morestack)
to allocate more stack space from the heap when required

Patch by Sanjoy Das.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138812 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-30 19:39:58 +00:00
Andrew Trick
32a183c84a findDeadCallerSavedReg fix: Missing NULL terminator in register arrays. 
Fix by Ivan Baev. Sorry I don't have a unit test, but the fix is obvious so I don't want to delay it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137404 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-12 00:49:19 +00:00
Bill Wendling
de77055a68 The compact unwinding offsets are divided by 8 on 64-bit machines. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136065 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-26 08:03:49 +00:00
Bill Wendling
39055b3a5c Update the comment. This feature is available only on Darwin at the moment. Though it's not Darwin-specific. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135951 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-25 20:15:15 +00:00
Bill Wendling
c57e7dbfaf Changed disabled code into a flag. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135924 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-25 18:04:49 +00:00
Bill Wendling
091a864f06 Remove dead variable. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135923 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-25 18:01:27 +00:00
Bill Wendling
09b02c8ddd After we've modified the prolog to save volatile registers, generate the compact 
unwind encoding for that function. This simply crawls through the prolog looking
for machine instrs marked as "frame setup". It can calculate from these what the
compact unwind should look like.

This is currently disabled because of needed linker support. But initial tests
look good.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135922 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-25 18:00:28 +00:00
Bill Wendling
fb4eb165d6 Mark instructions which are part of the frame setup with the MachineInstr::FrameSetup flag. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135645 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-21 00:44:56 +00:00
Bill Wendling
7bc3178182 Remove unused function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135635 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-20 23:07:42 +00:00
Bill Wendling
16da7366d5 Remove the now defunct getCompactUnwindEncoding method from the frame lowering code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135634 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-20 23:04:09 +00:00
Evan Cheng
2d28617de2 Move getInitialFrameState from TargetFrameInfo to MCAsmInfo (suggestions for 
better location welcome).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135438 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-18 22:29:13 +00:00
Bill Wendling
13123d9463 * Redo the permutation encoding for frameless stacks to be more like what the 
unwind library expects.
* Comment the permutation encoding for frameless stacks.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135202 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-14 22:01:34 +00:00
Bill Wendling
efe2a6557d Add code to handle a "frameless" unwind stack. 
The frameless unwind stack has a special encoding, the algorithm for which is in
"permuteEncode".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135103 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-13 23:03:31 +00:00
Bill Wendling
8440fe2166 Don't emit the FDE end label if the last thing emitted was a compact unwind and 
not the FDE


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135020 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-13 00:49:09 +00:00
Bill Wendling
3641e81172 Assign variable before we test it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135015 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-13 00:23:39 +00:00
Bill Wendling
f4f53f08f5 Fix obvious think-o. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135014 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-13 00:20:09 +00:00
Bill Wendling
595d745f5f Clean up the handling of an EBP/RBP unwind frame pointer. In particular, don't 
assert when the frame pointer is -1 (i.e., the function is "frameless").

Still to do: "frameless" unwind information.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135013 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-13 00:16:14 +00:00
Bill Wendling
b99e412650 Use ArrayRef instead of a std::vector&. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134595 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-07 04:42:01 +00:00
Bill Wendling
6a6b8c3e96 Add a target hook to encode the compact unwind information. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134577 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-07 00:54:13 +00:00
Nick Lewycky
3c2f0a11cc Fit banner in 80-col and adjust whitespace. No functionality changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132964 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-14 03:23:52 +00:00
Charles Davis
aff232a594 Put FrameSetup flag on x86 instructions that set up the call frame. No 
functionality change.

Later on, we'll use the flag to emit SEH pseudo-ops that describe how the
call frame was built.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132880 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-12 01:45:54 +00:00
Rafael Espindola
fc2bb8c444 Replace the -unwind-tables option with a per function flag. This is more 
LTO friendly as we can now correctly merge files compiled with or without
-fasynchronous-unwind-tables.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132033 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-25 03:44:17 +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
Rafael Espindola
f0adba9a7e Add 129518 back with a fix for when we are producing eh just because of debug info. 
Change ELF systems to use CFI for producing the EH tables. This reduces the
size of the clang binary in Debug builds from 690MB to 679MB.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129571 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-15 15:11:06 +00:00
Chris Lattner
7a2bdde0a0 Fix a ton of comment typos found by codespell. Patch by 
Luis Felipe Strano Moraes!



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129558 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-15 05:18:47 +00:00
NAKAMURA Takumi
bcb8c6d09e Revert r129518, "Change ELF systems to use CFI for producing the EH tables. This reduces the" 
It broke several builds.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129557 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-15 03:35:57 +00:00
Rafael Espindola
3dae6e7333 Change ELF systems to use CFI for producing the EH tables. This reduces the 
size of the clang binary in Debug builds from 690MB to 679MB.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129518 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-14 15:18:53 +00:00
NAKAMURA Takumi
a2e0762fae Target/X86: [PR8777][PR8778] Tweak alloca/chkstk for Windows targets. 
FIXME: Some cleanups would be needed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128206 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-03-24 07:07:00 +00:00
NAKAMURA Takumi
419f232783 Target/X86: Always emit "push/pop GPRs" in prologue/epilogue and emit "spill/reload frames" for XMMs. 
It improves Win64's prologue/epilogue but it would not affect ia32 and amd64 (lack of nonvolatile XMMs).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126568 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-02-27 08:47:19 +00:00
NAKAMURA Takumi
3f4be4fb86 Target/X86: Tweak allocating shadow area (aka home) on Win64. It must be enough for caller to allocate one. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124949 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-02-05 15:11:32 +00:00
NAKAMURA Takumi
2763538609 Target/X86: Fix whitespace. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124946 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-02-05 15:10:54 +00:00
Carl Norum
e47023d543 Test commit - fix a double 'should' in a comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124652 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-02-01 07:38:42 +00:00
Evan Cheng
2bffee2ee7 Patches to build EFI with Clang/LLVM. By Carl Norum. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124639 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-02-01 01:14:13 +00:00
Anton Korobeynikov
e749911372 Cleanup 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123475 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-14 21:57:58 +00:00
Jakob Stoklund Olesen
f7ca976e74 Fix a few more places that should use MBB::getLastNonDebugInstr(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123408 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-13 22:47:43 +00:00
Jakob Stoklund Olesen
4f28c1c714 Teach frame lowering to ignore debug values after the terminators. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123399 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-13 21:28:52 +00:00
Anton Korobeynikov
16c29b5f28 Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123170 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-10 12:39:04 +00:00