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LLVM backend for 6502
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9436574d1b
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Reid Kleckner 9436574d1b musttail: Forward regparms of variadic functions on x86_64 
Summary:
If a variadic function body contains a musttail call, then we copy all
of the remaining register parameters into virtual registers in the
function prologue. We track the virtual registers through the function
body, and add them as additional registers to pass to the call. Because
this is all done in virtual registers, the register allocator usually
gives us good code. If the function does a call, however, it will have
to spill and reload all argument registers (ew).

Forwarding regparms on x86_32 is not implemented because most compilers
don't support varargs in 32-bit with regparms.

Reviewers: majnemer

Subscribers: aemerson, llvm-commits

Differential Revision: http://reviews.llvm.org/D5060

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216780 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-29 21:42:08 +00:00
autoconf Delete support for AuroraUX. 2014-08-14 15:15:09 +00:00
bindings [OCaml] Expose Llvm.get_operand_use. 2014-08-12 02:55:45 +00:00
cmake Introduce -DLLVM_USE_SANITIZER=Undefined CMake option to build UBSan-ified version of LLVM/Clang. 2014-08-29 00:50:36 +00:00
docs Introduce -DLLVM_USE_SANITIZER=Undefined CMake option to build UBSan-ified version of LLVM/Clang. 2014-08-29 00:50:36 +00:00
examples Modernize raw_fd_ostream's constructor a bit. 2014-08-25 18:16:47 +00:00
include musttail: Forward regparms of variadic functions on x86_64 2014-08-29 21:42:08 +00:00
lib musttail: Forward regparms of variadic functions on x86_64 2014-08-29 21:42:08 +00:00
projects
test musttail: Forward regparms of variadic functions on x86_64 2014-08-29 21:42:08 +00:00
tools Don't create a MemoryBuffer just to get the MemoryBufferRef. NFC. 2014-08-27 20:25:55 +00:00
unittests Cleaning up static initializers in TimeValue. 2014-08-29 01:05:12 +00:00
utils Return a std::unique_ptr when creating a new MemoryBuffer. 2014-08-27 20:03:13 +00:00
.arcconfig
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.gitignore Add Polly to the ignored trees. 2014-06-25 13:13:36 +00:00
CMakeLists.txt
CODE_OWNERS.TXT
configure Delete support for AuroraUX. 2014-08-14 15:15:09 +00:00
CREDITS.TXT Rise from the dead and update personal info 2014-08-25 17:51:04 +00:00
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
Makefile
Makefile.common
Makefile.config.in Track clang r213171 2014-07-16 16:50:34 +00:00
Makefile.rules Delete support for AuroraUX. 2014-08-14 15:15:09 +00:00
README.txt Trivial test commit. 2014-04-26 19:05:45 +00:00

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