Chandler Carruth 1c49fda408 Fix a miscompile in the DAG combiner. Previously, we would incorrectly ... try to reduce the width of this load, and would end up transforming: (truncate (lshr (sextload i48 <ptr> as i64), 32) to i32) to (truncate (zextload i32 <ptr+4> as i64) to i32) We lost the sext attached to the load while building the narrower i32 load, and replaced it with a zext because lshr always zext's the results. Instead, bail out of this combine when there is a conflict between a sextload and a zext narrowing. The rest of the DAG combiner still optimize the code down to the proper single instruction: movswl 6(...),%eax Which is exactly what we wanted. Previously we read past the end *and* missed the sign extension: movl 6(...), %eax git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169802 91177308-0d34-0410-b5e6-96231b3b80d8		2012-12-11 00:36:57 +00:00
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Analysis	Optimistically analyse Phi cycles	2012-12-10 23:02:41 +00:00
Archive	Sort includes for all of the .h files under the 'lib' tree. These were	2012-12-04 07:12:27 +00:00
AsmParser	Reorganize FastMathFlags to be a wrapper around unsigned, and streamline some interfaces.	2012-12-09 21:12:04 +00:00
Bitcode	Reorganize FastMathFlags to be a wrapper around unsigned, and streamline some interfaces.	2012-12-09 21:12:04 +00:00
CodeGen	Fix a miscompile in the DAG combiner. Previously, we would incorrectly	2012-12-11 00:36:57 +00:00
DebugInfo	Sort includes for all of the .h files under the 'lib' tree. These were	2012-12-04 07:12:27 +00:00
ExecutionEngine	Adjust JIT target triple on OS X to match the current architecture.	2012-12-05 19:09:13 +00:00
Linker	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
MC	Defer call to InitSections until after MCContext has been initialized. If	2012-12-10 22:49:11 +00:00
Object	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
Option	Copy clang/Driver/<Option parsing stuff> to llvm.	2012-12-05 00:29:32 +00:00
Support	Make NaCl naming consistent. The triple OSType is called NaCl and is represented	2012-12-04 18:37:26 +00:00
TableGen	Sort includes for all of the .h files under the 'lib' tree. These were	2012-12-04 07:12:27 +00:00
Target	Fall back to the selection dag isel to select tail calls.	2012-12-11 00:18:02 +00:00
Transforms	Enable the loop vectorizer only on O2 and above. (Still disabled by default)	2012-12-10 21:45:01 +00:00
VMCore	s/AttrListPtr/AttributeSet/g to better label what this class is going to be in the near future.	2012-12-07 23:16:57 +00:00
CMakeLists.txt	Copy clang/Driver/<Option parsing stuff> to llvm.	2012-12-05 00:29:32 +00:00
LLVMBuild.txt	Copy clang/Driver/<Option parsing stuff> to llvm.	2012-12-05 00:29:32 +00:00
Makefile	Copy clang/Driver/<Option parsing stuff> to llvm.	2012-12-05 00:29:32 +00:00