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90 Commits

Author SHA1 Message Date
Eli Friedman 635d9692b6 Make sure we don't crash when -miphoneos-version-min is specified on x86. Hopefully this will fix gcc testsuite failures. 
llvm-svn: 138856
 2011-08-31 16:19:51 +00:00
Bill Wendling 6470e07e20 Fix off-by-one error Benjamin noticed. 
llvm-svn: 138832
 2011-08-30 21:23:24 +00:00
Bill Wendling 7a9c3033a4 Enable compact unwind info by default. This only applies to Darwin when CFI is 
disabled.

llvm-svn: 138826
 2011-08-30 20:54:11 +00:00
Rafael Espindola c21742112b 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.

llvm-svn: 138812
 2011-08-30 19:39:58 +00:00
Andrew Trick 210bf8351d 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.

llvm-svn: 137404
 2011-08-12 00:49:19 +00:00
Bill Wendling ee61946783 The compact unwinding offsets are divided by 8 on 64-bit machines. 
llvm-svn: 136065
 2011-07-26 08:03:49 +00:00
Bill Wendling 43ab71a9a8 Update the comment. This feature is available only on Darwin at the moment. Though it's not Darwin-specific. 
llvm-svn: 135951
 2011-07-25 20:15:15 +00:00
Bill Wendling 2dc0005b3c Changed disabled code into a flag. 
llvm-svn: 135924
 2011-07-25 18:04:49 +00:00
Bill Wendling 1d10909cb7 Remove dead variable. 
llvm-svn: 135923
 2011-07-25 18:01:27 +00:00
Bill Wendling b97270d58a 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.

llvm-svn: 135922
 2011-07-25 18:00:28 +00:00
Bill Wendling 28b6e12d9d Mark instructions which are part of the frame setup with the MachineInstr::FrameSetup flag. 
llvm-svn: 135645
 2011-07-21 00:44:56 +00:00
Bill Wendling ed93564c7a Remove unused function. 
llvm-svn: 135635
 2011-07-20 23:07:42 +00:00
Bill Wendling 01bd7d9dc0 Remove the now defunct getCompactUnwindEncoding method from the frame lowering code. 
llvm-svn: 135634
 2011-07-20 23:04:09 +00:00
Evan Cheng 67c033e6b8 Move getInitialFrameState from TargetFrameInfo to MCAsmInfo (suggestions for 
better location welcome).

llvm-svn: 135438
 2011-07-18 22:29:13 +00:00
Bill Wendling 2d825b5ecf * Redo the permutation encoding for frameless stacks to be more like what the 
unwind library expects.
* Comment the permutation encoding for frameless stacks.

llvm-svn: 135202
 2011-07-14 22:01:34 +00:00
Bill Wendling d11ea81db0 Add code to handle a "frameless" unwind stack. 
The frameless unwind stack has a special encoding, the algorithm for which is in
"permuteEncode".

llvm-svn: 135103
 2011-07-13 23:03:31 +00:00
Bill Wendling ee6e776be2 Don't emit the FDE end label if the last thing emitted was a compact unwind and 
not the FDE

llvm-svn: 135020
 2011-07-13 00:49:09 +00:00
Bill Wendling 0402e8fe4b Assign variable before we test it. 
llvm-svn: 135015
 2011-07-13 00:23:39 +00:00
Bill Wendling ed3c44224b Fix obvious think-o. 
llvm-svn: 135014
 2011-07-13 00:20:09 +00:00
Bill Wendling 929b90ff32 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.

llvm-svn: 135013
 2011-07-13 00:16:14 +00:00
Bill Wendling 667be58220 Use ArrayRef instead of a std::vector&. 
llvm-svn: 134595
 2011-07-07 04:42:01 +00:00
Bill Wendling b6adf46f62 Add a target hook to encode the compact unwind information. 
llvm-svn: 134577
 2011-07-07 00:54:13 +00:00
Nick Lewycky 34a425b075 Fit banner in 80-col and adjust whitespace. No functionality changes. 
llvm-svn: 132964
 2011-06-14 03:23:52 +00:00
Charles Davis 7ed40cbded 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.

llvm-svn: 132880
 2011-06-12 01:45:54 +00:00
Rafael Espindola fc9bae6f8b 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.

llvm-svn: 132033
 2011-05-25 03:44:17 +00:00
Rafael Espindola 80cb3cb1d6 Print all the moves at a given label instead of just the first one. 
Remove previous DwarfCFI hack.

llvm-svn: 130187
 2011-04-26 03:58:56 +00:00
Rafael Espindola a01cdb0e37 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.

llvm-svn: 129571
 2011-04-15 15:11:06 +00:00
Chris Lattner 0ab5e2cded Fix a ton of comment typos found by codespell. Patch by 
Luis Felipe Strano Moraes!

llvm-svn: 129558
 2011-04-15 05:18:47 +00:00
NAKAMURA Takumi b5e3e9dd27 Revert r129518, "Change ELF systems to use CFI for producing the EH tables. This reduces the" 
It broke several builds.

llvm-svn: 129557
 2011-04-15 03:35:57 +00:00
Rafael Espindola aa2a7cd828 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.

llvm-svn: 129518
 2011-04-14 15:18:53 +00:00
NAKAMURA Takumi 521eb7c11e Target/X86: [PR8777][PR8778] Tweak alloca/chkstk for Windows targets. 
FIXME: Some cleanups would be needed.
llvm-svn: 128206
 2011-03-24 07:07:00 +00:00
NAKAMURA Takumi d4e5003a3f 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).

llvm-svn: 126568
 2011-02-27 08:47:19 +00:00
NAKAMURA Takumi 1850c80afb Target/X86: Tweak allocating shadow area (aka home) on Win64. It must be enough for caller to allocate one. 
llvm-svn: 124949
 2011-02-05 15:11:32 +00:00
NAKAMURA Takumi f7f319d4d3 Target/X86: Fix whitespace. 
llvm-svn: 124946
 2011-02-05 15:10:54 +00:00
Carl Norum ecd90b5946 Test commit - fix a double 'should' in a comment. 
llvm-svn: 124652
 2011-02-01 07:38:42 +00:00
Evan Cheng d22a4a1fd6 Patches to build EFI with Clang/LLVM. By Carl Norum. 
llvm-svn: 124639
 2011-02-01 01:14:13 +00:00
Anton Korobeynikov 4d9de6be4b Cleanup 
llvm-svn: 123475
 2011-01-14 21:57:58 +00:00
Jakob Stoklund Olesen bbb1a54b84 Fix a few more places that should use MBB::getLastNonDebugInstr(). 
llvm-svn: 123408
 2011-01-13 22:47:43 +00:00
Jakob Stoklund Olesen 4bc5e38960 Teach frame lowering to ignore debug values after the terminators. 
llvm-svn: 123399
 2011-01-13 21:28:52 +00:00
Anton Korobeynikov 2f93128109 Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there. 
llvm-svn: 123170
 2011-01-10 12:39:04 +00:00