llvm/lib
Jakob Stoklund Olesen 351c8818f2 Handle <undef> operands in TwoAddressInstructionPass.
When the source register to a 2-addr instruction is undefined, there is
no need to attempt any transformations - simply replace the source
register with the destination register.

This also comes up when lowering IMPLICIT_DEF instructions - make sure
the <undef> flag is moved to the new partial register def operand:

  %vreg8<def> = INSERT_SUBREG %vreg9<undef>, %vreg0<kill>, sub_16bit
rewrite undef:
  %vreg8<def> = INSERT_SUBREG %vreg8<undef>, %vreg0<kill>, sub_16bit
convert to:
  %vreg8:sub_16bit<def,read-undef> = COPY %vreg0<kill>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159120 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-25 03:27:12 +00:00
..
Analysis llvm/lib: [CMake] Add explicit dependency to intrinsics_gen. 2012-06-24 13:32:01 +00:00
Archive Include cstdio in a few place that depended on getting it transitively through StringExtras.h 2012-03-23 11:35:30 +00:00
AsmParser Extend the IL for selecting TLS models (PR9788) 2012-06-23 11:37:03 +00:00
Bitcode llvm/lib: [CMake] Add explicit dependency to intrinsics_gen. 2012-06-24 13:32:01 +00:00
CodeGen Handle <undef> operands in TwoAddressInstructionPass. 2012-06-25 03:27:12 +00:00
DebugInfo Fix a C++11 UDL conflict. 2012-04-04 20:33:56 +00:00
ExecutionEngine llvm/lib: [CMake] Add explicit dependency to intrinsics_gen. 2012-06-24 13:32:01 +00:00
Linker Extend the IL for selecting TLS models (PR9788) 2012-06-23 11:37:03 +00:00
MC EmitZerofill should take a 64-bit size or else it's chopping off large zero-filled global. rdar://11729134 2012-06-22 20:14:46 +00:00
Object Added accessors for getting coff_relocation info 2012-06-18 19:47:16 +00:00
Support llvm/lib/Support/Errno.cpp: [Win32] Fix usage of strerror_s(). 2012-06-24 03:51:04 +00:00
TableGen Emit TableGen's header comment with C-style comments, so it can be used from C89 code. 2012-06-19 17:04:16 +00:00
Target %RCX is not a function live-out in eh.return functions. 2012-06-24 15:53:01 +00:00
Transforms llvm/lib: [CMake] Add explicit dependency to intrinsics_gen. 2012-06-24 13:32:01 +00:00
VMCore llvm/lib: [CMake] Add explicit dependency to intrinsics_gen. 2012-06-24 13:32:01 +00:00
CMakeLists.txt Move TableGen's parser and entry point into a library 2011-10-01 16:41:13 +00:00
LLVMBuild.txt LLVMBuild: Introduce a common section which currently has a list of the 2011-12-12 22:45:54 +00:00
Makefile Remove more of llvmc and dependencies. 2011-09-20 00:34:27 +00:00