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003ee915ba
llvm-mirror/test/Transforms
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James Y Knight 003ee915ba Add __atomic_* lowering to AtomicExpandPass. 
AtomicExpandPass can now lower atomic load, atomic store, atomicrmw, and
cmpxchg instructions to __atomic_* library calls, when the target
doesn't support atomics of a given size.

This is the first step towards moving all atomic lowering from clang
into llvm. When all is done, the behavior of __sync_* builtins,
__atomic_* builtins, and C11 atomics will be unified.

Previously LLVM would pass everything through to the ISelLowering
code. There, unsupported atomic instructions would turn into __sync_*
library calls. Because of that behavior, Clang currently avoids emitting
llvm IR atomic instructions when this would happen, and emits __atomic_*
library functions itself, in the frontend.

This change makes LLVM able to emit __atomic_* libcalls, and thus will
eventually allow clang to depend on LLVM to do the right thing.

It is advantageous to do the new lowering to atomic libcalls in
AtomicExpandPass, before ISel time, because it's important that all
atomic operations for a given size either lower to __atomic_*
libcalls (which may use locks), or native instructions which won't. No
mixing and matching.

At the moment, this code is enabled only for SPARC, as a
demonstration. The next commit will expand support to all of the other
targets.

Differential Revision: http://reviews.llvm.org/D18200

llvm-svn: 266002
2016-04-11 22:22:33 +00:00
..
ADCE testcase gardening: update the emissionKind enum to the new syntax. (NFC) 2016-04-01 00:16:49 +00:00
AddDiscriminators [DebugInfo] Fix even more tests to include DICompileunit. 2016-04-11 18:53:27 +00:00
AlignmentFromAssumptions
ArgumentPromotion testcase gardening: update the emissionKind enum to the new syntax. (NFC) 2016-04-01 00:16:49 +00:00
AtomicExpand Add __atomic_* lowering to AtomicExpandPass. 2016-04-11 22:22:33 +00:00
BBVectorize
BDCE
BranchFolding Move branch folding test to a better location. 2015-12-03 19:41:25 +00:00
CodeExtractor
CodeGenPrepare [CodeGenPrepare] Avoid sinking soft-FP comparisons 2016-04-03 16:36:17 +00:00
ConstantHoisting
ConstantMerge
ConstProp IR: Make ConstantDataArray::getFP actually return a ConstantDataArray 2015-12-09 21:21:07 +00:00
CorrelatedValuePropagation [CVP] Convert an SDiv to a UDiv if both operands are known to be nonnegative 2016-03-14 03:24:28 +00:00
CrossDSOCFI [cfi] Cross-DSO CFI diagnostic mode (LLVM part). 2016-01-25 23:35:03 +00:00
DeadArgElim testcase gardening: update the emissionKind enum to the new syntax. (NFC) 2016-04-01 00:16:49 +00:00
DeadStoreElimination testcase gardening: update the emissionKind enum to the new syntax. (NFC) 2016-04-01 00:16:49 +00:00
EarlyCSE Fix several accidental DOS line endings in source files 2016-01-03 17:22:03 +00:00
EliminateAvailableExternally
Float2Int [Float2Int] Don't operate on vector instructions 2015-12-09 21:08:18 +00:00
ForcedFunctionAttrs [attrs] Split off the forced attributes utility into its own pass that 2015-12-27 08:13:45 +00:00
FunctionAttrs Don't IPO over functions that can be de-refined 2016-04-08 00:48:30 +00:00
FunctionImport [ThinLTO] Move summary computation from BitcodeWriter to new pass 2016-04-11 13:58:45 +00:00
GCOVProfiling testcase gardening: update the emissionKind enum to the new syntax. (NFC) 2016-04-01 00:16:49 +00:00
GlobalDCE
GlobalOpt More upgrading of old- and very-old-style debug info in testcases. 2016-04-11 15:53:44 +00:00
GVN [GVN] Fix handling of sub-byte types in big-endian mode 2016-04-07 15:45:02 +00:00
IndVarSimplify This reverts commit r265913 and r265912 2016-04-11 15:26:18 +00:00
InferFunctionAttrs [NVPTX] Infer __nvvm_reflect as nounwind, readnone 2016-03-31 21:29:57 +00:00
Inline Maintain calling convention when inling calls to llvm.deoptimize 2016-04-09 00:22:59 +00:00
InstCombine [InstCombine] consolidate tests for related bugs 2016-04-11 17:58:37 +00:00
InstMerge fixed typo - CHECK-LABEL 2016-03-29 06:49:38 +00:00
InstSimplify [InstSimplify] regenerate checks using a script 2016-03-25 20:12:25 +00:00
Internalize
IPConstantProp Don't IPO over functions that can be de-refined 2016-04-08 00:48:30 +00:00
IRCE [SCEV] Try to reuse existing value during SCEV expansion 2016-02-04 01:27:38 +00:00
JumpThreading [JumpThreading] See through Cast Instructions 2016-03-16 04:52:52 +00:00
LCSSA [WinEH] Update LCSSA to handle catchswitch with handlers inside and outside a loop 2015-12-18 18:12:35 +00:00
LICM Mark some FP intrinsics as safe to speculatively execute 2016-04-03 12:30:46 +00:00
LoadCombine
LoopDataPrefetch [LoopDataPrefetch] Centralize the tuning cl::opts under the pass 2016-03-29 23:45:52 +00:00
LoopDeletion
LoopDistribute
LoopIdiom testcase gardening: update the emissionKind enum to the new syntax. (NFC) 2016-04-01 00:16:49 +00:00
LoopInterchange
LoopLoadElim [LLE] Check for mismatching types between the store and the load earlier 2016-03-24 17:59:26 +00:00
LoopReroll testcase gardening: update the emissionKind enum to the new syntax. (NFC) 2016-04-01 00:16:49 +00:00
LoopRotate testcase gardening: update the emissionKind enum to the new syntax. (NFC) 2016-04-01 00:16:49 +00:00
LoopSimplify [DebugInfo] Fix tests so that each subprogram belongs to a CU. 2016-04-05 23:37:08 +00:00
LoopSimplifyCFG Add LoopSimplifyCFG pass 2016-01-29 22:35:36 +00:00
LoopStrengthReduce Don't delete empty preheaders in CodeGenPrepare if it would create a critical edge 2016-04-05 14:06:20 +00:00
LoopUnroll [LoopUnroll] Fix the way we update DT after complete unrolling. 2016-04-06 21:47:12 +00:00
LoopUnswitch [SimlifyCFG] Prevent passes from destroying canonical loop structure, especially for nested loops 2016-03-29 04:08:57 +00:00
LoopVectorize [DebugInfo/Test] Add CU as required. 2016-04-11 21:16:48 +00:00
LoopVersioning [LVers] Change CHECK_LABEL to CHECK-LABEL (underscore->dash) 2016-03-28 21:04:13 +00:00
LoopVersioningLICM Corrected tests for Loop Versioning LICM, by adding “REQUIRES: asserts”. 2016-02-06 12:34:41 +00:00
LowerAtomic
LowerBitSets [cfi] Fix LowerBitSets on 32-bit targets. 2015-12-21 22:14:04 +00:00
LowerExpectIntrinsic
LowerGuardIntrinsic Introduce a @llvm.experimental.guard intrinsic 2016-03-31 00:18:46 +00:00
LowerInvoke
LowerSwitch
Mem2Reg testcase gardening: update the emissionKind enum to the new syntax. (NFC) 2016-04-01 00:16:49 +00:00
MemCpyOpt Imporove load to store => memcpy 2016-03-14 22:52:27 +00:00
MergeFunc [IR] Remove terminatepad 2015-12-14 18:34:23 +00:00
MetaRenamer
NaryReassociate [NaryReassociate] allow candidate to have a different type 2015-12-18 21:36:30 +00:00
ObjCARC Don't IPO over functions that can be de-refined 2016-04-08 00:48:30 +00:00
PartiallyInlineLibCalls
PGOProfile [PGO] Avoid instrumenting direct callee's at value sites. 2016-04-04 18:56:36 +00:00
PhaseOrdering
PlaceSafepoints [PlaceSafepoints] Clamp NoStatepoints to true 2016-01-28 21:51:14 +00:00
PruneEH [PruneEH] Don't try to insert a terminator after another terminator 2016-01-23 06:00:44 +00:00
Reassociate Reassociate: Reprocess RedoInsts after each inst 2016-01-26 18:42:36 +00:00
Reg2Mem
RewriteStatepointsForGC [RS4GC] Better codegen for deoptimize calls 2016-04-05 23:18:35 +00:00
SafeStack testcase gardening: update the emissionKind enum to the new syntax. (NFC) 2016-04-01 00:16:49 +00:00
SampleProfile [DebugInfo] Fix even more tests to include DICompileunit. 2016-04-11 18:53:27 +00:00
Scalarizer testcase gardening: update the emissionKind enum to the new syntax. (NFC) 2016-04-01 00:16:49 +00:00
ScalarRepl testcase gardening: update the emissionKind enum to the new syntax. (NFC) 2016-04-01 00:16:49 +00:00
SCCP Don't IPO over functions that can be de-refined 2016-04-08 00:48:30 +00:00
SeparateConstOffsetFromGEP [ValueTracking] Remove dead code from an old experiment 2016-03-03 19:44:06 +00:00
SimplifyCFG testcase gardening: update the emissionKind enum to the new syntax. (NFC) 2016-04-01 00:16:49 +00:00
Sink [IR] Reformulate LLVM's EH funclet IR 2015-12-12 05:38:55 +00:00
SLPVectorizer [SLPVectorizer] Vectorizing the libm sqrt to llvm's sqrt intrinsic requires nnan 2016-04-06 07:04:53 +00:00
SpeculativeExecution
SROA Fix missing DICompileUnits in testcases 2016-04-11 18:15:44 +00:00
StraightLineStrengthReduce
StripDeadPrototypes
StripSymbols More upgrading of old- and very-old-style debug info in testcases. 2016-04-11 15:53:44 +00:00
StructurizeCFG AMDGPU: Remove some old intrinsic uses from tests 2016-02-11 06:02:01 +00:00
TailCallElim Push isDereferenceableAndAlignedPointer down into isSafeToLoadUnconditionally 2016-01-17 12:35:29 +00:00
Util Fix missing DICompileUnits in testcases 2016-04-11 18:15:44 +00:00
WholeProgramDevirt WholeProgramDevirt: introduce. 2016-02-09 22:50:34 +00:00