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Author SHA1 Message Date
Maksim Panchenko cce239c45d HHVM calling conventions. 
HHVM calling convention, hhvmcc, is used by HHVM JIT for
functions in translated cache. We currently support LLVM back end to
generate code for X86-64 and may support other architectures in the
future.

In HHVM calling convention any GP register could be used to pass and
return values, with the exception of R12 which is reserved for
thread-local area and is callee-saved. Other than R12, we always
pass RBX and RBP as args, which are our virtual machine's stack pointer
and frame pointer respectively.

When we enter translation cache via hhvmcc function, we expect
the stack to be aligned at 16 bytes, i.e. skewed by 8 bytes as opposed
to standard ABI alignment. This affects stack object alignment and stack
adjustments for function calls.

One extra calling convention, hhvm_ccc, is used to call C++ helpers from
HHVM's translation cache. It is almost identical to standard C calling
convention with an exception of first argument which is passed in RBP
(before we use RDI, RSI, etc.)

Differential Revision: http://reviews.llvm.org/D12681

llvm-svn: 248832
 2015-09-29 22:09:16 +00:00
David Majnemer 7fddeccb8b Move the personality function from LandingPadInst to Function 
The personality routine currently lives in the LandingPadInst.

This isn't desirable because:
- All LandingPadInsts in the same function must have the same
  personality routine.  This means that each LandingPadInst beyond the
  first has an operand which produces no additional information.

- There is ongoing work to introduce EH IR constructs other than
  LandingPadInst.  Moving the personality routine off of any one
  particular Instruction and onto the parent function seems a lot better
  than have N different places a personality function can sneak onto an
  exceptional function.

Differential Revision: http://reviews.llvm.org/D10429

llvm-svn: 239940
 2015-06-17 20:52:32 +00:00
Reid Kleckner 35fc363ce8 Parse 'ghccc' in .ll files as the GHC convention (cc 10) 
Previously we just used "cc 10" in the .ll files, but that isn't very
human readable.

llvm-svn: 223076
 2014-12-01 21:04:44 +00:00
Bill Wendling ff2091737e Update tests to the newest EH syntax. 
llvm-svn: 138541
 2011-08-25 01:30:18 +00:00
Tanya Lattner b7e02fc0bf Remove llvm-upgrade and update tests. 
llvm-svn: 47784
 2008-03-01 07:38:40 +00:00
Reid Spencer d0e30dc5be Use the llvm-upgrade program to upgrade llvm assembly. 
llvm-svn: 32115
 2006-12-02 04:23:10 +00:00
Chris Lattner c4e9aff50f new testcase for csretcc 
llvm-svn: 28413
 2006-05-19 22:00:54 +00:00
Chris Lattner f71853e277 new testcase 
llvm-svn: 21750
 2005-05-06 22:33:44 +00:00