Jakob Stoklund Olesen d18e1ee34f Don't treat a partial <def,undef> operand as a read. ... Normally, a partial register def is treated as reading the super-register unless it also defines the full register like this: %vreg110:sub_32bit<def> = COPY %vreg77:sub_32bit, %vreg110<imp-def> This patch also uses the <undef> flag on partial defs to recognize non-reading operands: %vreg110:sub_32bit<def,undef> = COPY %vreg77:sub_32bit This fixes a subtle bug in RegisterCoalescer where LIS->shrinkToUses would treat a coalesced copy as still reading the register, extending the live range artificially. My test case only works when I disable DCE so a dead copy is left for RegisterCoalescer, so I am not including it. <rdar://problem/9967101> llvm-svn: 138018		2011-08-19 00:30:17 +00:00
..
Analysis	There is no need to add file as context for subroutine type. The subroutine type does not need any context.	2011-08-18 23:50:57 +00:00
Archive	Rewrite the CMake build to use explicit dependencies between libraries,	2011-07-29 00:14:25 +00:00
AsmParser	Remove unused variable.	2011-08-18 08:13:18 +00:00
Bitcode	Initial commit of the 'landingpad' instruction.	2011-08-12 20:24:12 +00:00
CodeGen	Don't treat a partial <def,undef> operand as a read.	2011-08-19 00:30:17 +00:00
CompilerDriver	Build CompilerDriver library.	2011-03-12 22:01:42 +00:00
ExecutionEngine	EE: Provide the symbol "lseek64" explicitly with <unistd.h> on Linux glibc.	2011-08-14 00:34:04 +00:00
Linker	switch to the new struct api.	2011-08-12 18:07:26 +00:00
MC	Remove unused Target argument from AsmParser construction methods.	2011-08-16 18:33:49 +00:00
Object	Rewrite the CMake build to use explicit dependencies between libraries,	2011-07-29 00:14:25 +00:00
Support	Add NativeClient operating system support.	2011-08-18 22:54:21 +00:00
Target	Re-encoded 128-bit AVX versions of SQRT, RSQRT, RCP have 3 operands	2011-08-18 23:59:21 +00:00
Transforms	Track a retain+release nesting level independently of the	2011-08-19 00:26:36 +00:00
VMCore	Rip out the old StructType APIs as warned about on llvmdev last week.	2011-08-18 17:39:28 +00:00
CMakeLists.txt	Build CompilerDriver library.	2011-03-12 22:01:42 +00:00
Makefile	Add LLVMObject Library.	2010-11-15 03:21:41 +00:00