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217cd18656
llvm-6502/lib/CodeGen/SelectionDAG
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Andrea Di Biagio 217cd18656 [DAGCombiner] Avoid calling method 'isShuffleMaskLegal' on illegal vector types. 
This patch fixes a crasher in method 'DAGCombiner::visitOR' due to an invalid
call to method 'isShuffleMaskLegal'. On x86, method 'isShuffleMaskLegal'
always expects a legal vector value type in input.

With this patch, we immediately check if the input OR dag node has a legal
vector type; we only try to fold a OR dag node into a single shufflevector
if we know that the resulting shuffle will have a legal type.
This is to avoid calling method 'isShuffleMaskLegal' on a potentially
illegal vector value type.

Added a new test-case to file 'CodeGen/X86/combine-or.ll' to verify that
DAGCombiner doesn't crash in the attempt to check/combine an OR between shuffles
with illegal types.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213020 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-15 00:02:32 +00:00
..
CMakeLists.txt
DAGCombiner.cpp [DAGCombiner] Avoid calling method 'isShuffleMaskLegal' on illegal vector types. 2014-07-15 00:02:32 +00:00
FastISel.cpp Avoid a warning from MSVC on "*/" in this code by inserting a space 2014-07-12 00:06:46 +00:00
FunctionLoweringInfo.cpp [Modules] Remove potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 02:02:50 +00:00
InstrEmitter.cpp This reapplies r207235 with an additional bugfixes caught by the msan 2014-04-25 20:49:25 +00:00
InstrEmitter.h Revert "Give internal classes hidden visibility." 2013-09-11 18:05:11 +00:00
LegalizeDAG.cpp ARM: Allow __fp16 as a function arg or return type for AArch64 2014-07-11 13:33:46 +00:00
LegalizeFloatTypes.cpp [Modules] Remove potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 02:02:50 +00:00
LegalizeIntegerTypes.cpp Make it possible for ints/floats to return different values from getBooleanContents() 2014-07-10 10:18:12 +00:00
LegalizeTypes.cpp Make it possible for ints/floats to return different values from getBooleanContents() 2014-07-10 10:18:12 +00:00
LegalizeTypes.h [x86,SDAG] Introduce any- and sign-extend-vector-inreg nodes analogous 2014-07-10 12:32:32 +00:00
LegalizeTypesGeneric.cpp Fix ppcf128 component access on little-endian systems 2014-07-03 15:06:47 +00:00
LegalizeVectorOps.cpp [x86,SDAG] Introduce any- and sign-extend-vector-inreg nodes analogous 2014-07-10 12:32:32 +00:00
LegalizeVectorTypes.cpp [x86,SDAG] Introduce any- and sign-extend-vector-inreg nodes analogous 2014-07-10 12:32:32 +00:00
LLVMBuild.txt
Makefile
ResourcePriorityQueue.cpp Fix 'platform-specific' hyphenations 2014-06-30 18:57:16 +00:00
ScheduleDAGFast.cpp [Modules] Remove potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 02:02:50 +00:00
ScheduleDAGRRList.cpp fixed typo 2014-07-14 18:21:07 +00:00
ScheduleDAGSDNodes.cpp Convert SelectionDAG::MorphNodeTo to use ArrayRef. 2014-04-27 19:21:16 +00:00
ScheduleDAGSDNodes.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-16 04:21:27 +00:00
ScheduleDAGVLIW.cpp The hazard recognizer only needs a subtarget, not a target machine 2014-06-13 22:38:52 +00:00
SDNodeDbgValue.h This reapplies r207235 with an additional bugfixes caught by the msan 2014-04-25 20:49:25 +00:00
SelectionDAG.cpp [x86,SDAG] Introduce any- and sign-extend-vector-inreg nodes analogous 2014-07-10 12:32:32 +00:00
SelectionDAGBuilder.cpp [FastISel] Make isInTailCallPosition independent of SelectionDAG. 2014-07-11 20:50:47 +00:00
SelectionDAGBuilder.h Fix 'platform-specific' hyphenations 2014-06-30 18:57:16 +00:00
SelectionDAGDumper.cpp [x86,SDAG] Introduce any- and sign-extend-vector-inreg nodes analogous 2014-07-10 12:32:32 +00:00
SelectionDAGISel.cpp Revert "Introduce a string_ostream string builder facilty" 2014-06-26 22:52:05 +00:00
SelectionDAGPrinter.cpp Revert "Introduce a string_ostream string builder facilty" 2014-06-26 22:52:05 +00:00
TargetLowering.cpp SelectionDAG: Factor FP_TO_SINT lower code out of DAGLegalizer 2014-07-10 22:40:18 +00:00
TargetSelectionDAGInfo.cpp Have TargetSelectionDAGInfo take a DataLayout initializer rather than 2014-06-06 19:04:48 +00:00