R600: Proper insert S_WAITCNT instructions
Some instructions like memory reads/writes are executed
asynchronously, so we need to insert S_WAITCNT instructions
to block before accessing their results. Previously we have
just inserted S_WAITCNT instructions after each async
instruction, this patch fixes this and adds a prober
insertion pass.
Patch by: Christian König
Tested-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
Signed-off-by: Christian König <deathsimple@vodafone.de>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172846 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/R600/AMDGPU.h b/lib/Target/R600/AMDGPU.h
index 0f5125d..c75ec24 100644
--- a/lib/Target/R600/AMDGPU.h
+++ b/lib/Target/R600/AMDGPU.h
@@ -30,6 +30,7 @@
FunctionPass *createSILowerControlFlowPass(TargetMachine &tm);
FunctionPass *createSICodeEmitterPass(formatted_raw_ostream &OS);
FunctionPass *createSILowerLiteralConstantsPass(TargetMachine &tm);
+FunctionPass *createSIInsertWaits(TargetMachine &tm);
// Passes common to R600 and SI
Pass *createAMDGPUStructurizeCFGPass();