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

..

CMakeLists.txt

llvm/lib: [CMake] Add explicit dependency to intrinsics_gen.

2012-06-24 13:32:01 +00:00

DAGCombiner.cpp

Fix a miscompile in the DAG combiner. Previously, we would incorrectly

2012-12-11 00:36:57 +00:00

FastISel.cpp

Use the new script to sort the includes of every file under lib.

2012-12-03 16:50:05 +00:00

FunctionLoweringInfo.cpp

Use the new script to sort the includes of every file under lib.

2012-12-03 16:50:05 +00:00

InstrEmitter.cpp

Use the new script to sort the includes of every file under lib.

2012-12-03 16:50:05 +00:00

InstrEmitter.h

Sort includes for all of the .h files under the 'lib' tree. These were

2012-12-04 07:12:27 +00:00

LegalizeDAG.cpp

LegalizeDAG: Allow type promotion of scalar loads

2012-12-10 21:41:58 +00:00

LegalizeFloatTypes.cpp

Follow the same routine to add target float expansion hook

2012-10-11 07:22:01 +00:00

LegalizeIntegerTypes.cpp

Back out r166591, not sure why this made it through since I cancelled the command. Bleh, sorry about this!

2012-10-24 17:25:11 +00:00

LegalizeTypes.cpp

Use the new script to sort the includes of every file under lib.

2012-12-03 16:50:05 +00:00

LegalizeTypes.h

Sort includes for all of the .h files under the 'lib' tree. These were

2012-12-04 07:12:27 +00:00

LegalizeTypesGeneric.cpp

Fix big-endian codegen bug in DAGTypeLegalizer::ExpandRes_BITCAST

2012-10-12 15:42:58 +00:00

LegalizeVectorOps.cpp

Mark FP_EXTEND form v2f32 to v2f64 as "expand" for ARM NEON. Patch by Pete Couperus.

2012-11-17 01:52:46 +00:00

LegalizeVectorTypes.cpp

Cleanup recent addition of DAGTypeLegalizer::SplitVecOp_VSELECT

2012-11-29 19:42:09 +00:00

LLVMBuild.txt

LLVMBuild: Remove trailing newline, which irked me.

2011-12-12 19:48:00 +00:00

Makefile

…

ResourcePriorityQueue.cpp

Simplify code. No functionality change.

2012-12-04 01:00:52 +00:00

ScheduleDAGFast.cpp

Use the new script to sort the includes of every file under lib.

2012-12-03 16:50:05 +00:00

ScheduleDAGRRList.cpp

Use the new script to sort the includes of every file under lib.

2012-12-03 16:50:05 +00:00

ScheduleDAGSDNodes.cpp

Use the new script to sort the includes of every file under lib.

2012-12-03 16:50:05 +00:00

ScheduleDAGSDNodes.h

Add a really faster pre-RA scheduler (-pre-RA-sched=linearize). It doesn't use

2012-10-17 19:39:36 +00:00

ScheduleDAGVLIW.cpp

Use the new script to sort the includes of every file under lib.

2012-12-03 16:50:05 +00:00

SDNodeDbgValue.h

Sort includes for all of the .h files under the 'lib' tree. These were

2012-12-04 07:12:27 +00:00

SDNodeOrdering.h

Mark unimplemented copy constructors and copy assignment operators as LLVM_DELETED_FUNCTION.

2012-09-18 02:01:41 +00:00

SelectionDAG.cpp

Some enhancements for memcpy / memset inline expansion.

2012-12-10 23:21:26 +00:00

SelectionDAGBuilder.cpp

Fall back to the selection dag isel to select tail calls.

2012-12-11 00:18:02 +00:00

SelectionDAGBuilder.h

Sort includes for all of the .h files under the 'lib' tree. These were

2012-12-04 07:12:27 +00:00

SelectionDAGDumper.cpp

Use the new script to sort the includes of every file under lib.

2012-12-03 16:50:05 +00:00

SelectionDAGISel.cpp

Fall back to the selection dag isel to select tail calls.

2012-12-11 00:18:02 +00:00

SelectionDAGPrinter.cpp

Use the new script to sort the includes of every file under lib.

2012-12-03 16:50:05 +00:00

TargetLowering.cpp

Fix a coding style nit.

2012-12-10 22:00:20 +00:00

TargetSelectionDAGInfo.cpp

Move TargetData to DataLayout.

2012-10-08 16:38:25 +00:00