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llvm-project/llvm/lib/Target/Hexagon
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Juergen Ributzka 34c652d34d SelectionDAG: Teach the legalizer to split SETCC if VSELECT needs splitting too. 
This patch reapplies r193676 with an additional fix for the Hexagon backend. The
SystemZ backend has already been fixed by r194148.

The Type Legalizer recognizes that VSELECT needs to be split, because the type
is to wide for the given target. The same does not always apply to SETCC,
because less space is required to encode the result of a comparison. As a result
VSELECT is split and SETCC is unrolled into scalar comparisons.

This commit fixes the issue by checking for VSELECT-SETCC patterns in the DAG
Combiner. If a matching pattern is found, then the result mask of SETCC is
promoted to the expected vector mask type for the given target. Now the type
legalizer will split both VSELECT and SETCC.

This allows the following X86 DAG Combine code to sucessfully detect the MIN/MAX
pattern. This fixes PR16695, PR17002, and <rdar://problem/14594431>.

Reviewed by Nadav

llvm-svn: 194542
 		2013-11-13 01:57:54 +00:00
..
InstPrinter Remove unused stdio.h includes 2013-08-18 08:29:51 +00:00
MCTargetDesc Add a MCAsmInfoELF class and factor some code into it. 2013-10-16 01:34:32 +00:00
TargetInfo Move all of the header files which are involved in modelling the LLVM IR 2013-01-02 11:36:10 +00:00
CMakeLists.txt Target/*/CMakeLists.txt: Add the dependency to CommonTableGen explicitly for each corresponding CodeGen. 2013-08-06 06:38:37 +00:00
Hexagon.h Access the TargetLoweringInfo from the TargetMachine object instead of caching it. The TLI may change between functions. No functionality change. 2013-06-19 21:36:55 +00:00
Hexagon.td Hexagon: Fix switch statements in GetDotOldOp and IsNewifyStore. 2013-05-10 20:58:11 +00:00
HexagonAsmPrinter.cpp Add a helper getSymbol to AsmPrinter. 2013-10-29 17:07:16 +00:00
HexagonAsmPrinter.h Delete executive bit on ./lib/Target/Hexagon/HexagonAsmPrinter.h. 2012-12-29 15:23:06 +00:00
HexagonCFGOptimizer.cpp Print IR from Hexagon MI passes with -print-before/after-all. 2013-05-06 21:58:00 +00:00
HexagonCallingConv.td
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HexagonCallingConvLower.cpp Use SmallVectorImpl& instead of SmallVector to avoid repeating small vector size. 2013-07-14 04:42:23 +00:00
HexagonCallingConvLower.h Use SmallVectorImpl& instead of SmallVector to avoid repeating small vector size. 2013-07-14 04:42:23 +00:00
HexagonCopyToCombine.cpp Hexagon: Typo fix. 2013-05-28 19:01:45 +00:00
HexagonExpandPredSpillCode.cpp Print IR from Hexagon MI passes with -print-before/after-all. 2013-05-06 21:58:00 +00:00
HexagonFixupHwLoops.cpp Extend Hexagon hardware loop generation to handle various additional cases: 2013-02-11 21:37:55 +00:00
HexagonFrameLowering.cpp Remove dead calls to addFrameMove. 2013-05-16 15:08:37 +00:00
HexagonFrameLowering.h Move the eliminateCallFramePseudoInstr method from TargetRegisterInfo 2013-02-21 20:05:00 +00:00
HexagonHardwareLoops.cpp Replace some unnecessary vector copies with references. 2013-09-15 22:04:42 +00:00
HexagonISelDAGToDAG.cpp ISelDAG: spot chain cycles involving MachineNodes 2013-09-22 08:21:56 +00:00
HexagonISelLowering.cpp Hexagon: Remove global state. 2013-10-27 11:16:09 +00:00
HexagonISelLowering.h SelectionDAG: Teach the legalizer to split SETCC if VSELECT needs splitting too. 2013-11-13 01:57:54 +00:00
HexagonInstrFormats.td Even more spelling fixes for "instruction". 2013-09-28 13:42:22 +00:00
HexagonInstrFormatsV4.td Hexagon: Change insn class to support instruction encoding. 2013-02-14 19:57:17 +00:00
HexagonInstrInfo.cpp DebugInfo: remove target-specific Frame Index handling for DBG_VALUE MachineInstrs 2013-06-16 20:34:27 +00:00
HexagonInstrInfo.h DebugInfo: remove target-specific Frame Index handling for DBG_VALUE MachineInstrs 2013-06-16 20:34:27 +00:00
HexagonInstrInfo.td Hexagon: Pass to replace tranfer/copy instructions into combine instruction 2013-05-14 18:54:06 +00:00
HexagonInstrInfoV3.td Hexagon: Use multiclass for Jump instructions. 2013-05-01 21:37:34 +00:00
HexagonInstrInfoV4.td Prune trailing linefeeds. 2013-10-28 04:07:31 +00:00
HexagonInstrInfoV5.td Hexagon: Fix switch cases in HexagonVLIWPacketizer.cpp. 2013-05-10 20:27:34 +00:00
HexagonIntrinsics.td
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HexagonIntrinsicsDerived.td
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HexagonIntrinsicsV3.td
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HexagonIntrinsicsV4.td
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HexagonIntrinsicsV5.td
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HexagonMCInstLower.cpp Add a helper getSymbol to AsmPrinter. 2013-10-29 17:07:16 +00:00
HexagonMachineFunctionInfo.h Hexagon: Use multiclass for Jump instructions. 2013-05-01 21:37:34 +00:00
HexagonMachineScheduler.cpp Rename variables for consistency. 2013-09-11 00:41:02 +00:00
HexagonMachineScheduler.h mi-sched: Precompute a PressureDiff for each instruction, adjust for liveness later. 2013-08-30 03:49:48 +00:00
HexagonNewValueJump.cpp Suppress GCC compiler warnings in release builds about variables that are only 2013-05-13 07:50:47 +00:00
HexagonOperands.td Move all operand definitions into HexagonOperands.td 2012-12-04 05:00:31 +00:00
HexagonPeephole.cpp Even more spelling fixes for "instruction". 2013-09-28 13:42:22 +00:00
HexagonRegisterInfo.cpp Remove getEHExceptionRegister and getEHHandlerRegister. 2013-10-07 13:39:22 +00:00
HexagonRegisterInfo.h Remove getEHExceptionRegister and getEHHandlerRegister. 2013-10-07 13:39:22 +00:00
HexagonRegisterInfo.td Make SubRegIndex size mandatory, following r183020. 2013-05-31 23:45:26 +00:00
HexagonRemoveSZExtArgs.cpp Print IR from Hexagon MI passes with -print-before/after-all. 2013-05-06 21:58:00 +00:00
HexagonSchedule.td Hexagon: Change insn class to support instruction encoding. 2013-02-14 19:57:17 +00:00
HexagonScheduleV4.td Hexagon: Change insn class to support instruction encoding. 2013-02-14 19:57:17 +00:00
HexagonSelectCCInfo.td
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HexagonSelectionDAGInfo.cpp Track IR ordering of SelectionDAG nodes 2/4. 2013-05-25 02:42:55 +00:00
HexagonSelectionDAGInfo.h Track IR ordering of SelectionDAG nodes 2/4. 2013-05-25 02:42:55 +00:00
HexagonSplitConst32AndConst64.cpp Remove use of forbidden 'iostream' header. 2013-08-21 20:36:42 +00:00
HexagonSplitTFRCondSets.cpp Print IR from Hexagon MI passes with -print-before/after-all. 2013-05-06 21:58:00 +00:00
HexagonSubtarget.cpp Hexagon: Add and enable memops setbit, clrbit, &,|,+,- for byte, short, and word. 2013-03-22 18:41:34 +00:00
HexagonSubtarget.h Sort includes for all of the .h files under the 'lib' tree. These were 2012-12-04 07:12:27 +00:00
HexagonTargetMachine.cpp Allow subtarget selection of the default MachineScheduler and document the interface. 2013-09-20 05:14:41 +00:00
HexagonTargetMachine.h Switch TargetTransformInfo from an immutable analysis pass that requires 2013-01-07 01:37:14 +00:00
HexagonTargetObjectFile.cpp Hexagon: Fix Small Data support to handle -G 0 correctly. 2013-05-07 19:53:00 +00:00
HexagonTargetObjectFile.h Hexagon: Fix Small Data support to handle -G 0 correctly. 2013-05-07 19:53:00 +00:00
HexagonVLIWPacketizer.cpp Hexagon: Make helper functions static. 2013-05-23 15:43:11 +00:00
HexagonVarargsCallingConvention.h Move TargetData to DataLayout. 2012-10-08 16:38:25 +00:00
LLVMBuild.txt
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Makefile
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