[AMDGPU] Add perf hints to functions
This is adoption of HSAIL perfhint pass. Two types of hints are produced:
1. Function is memory bound.
2. Kernel can use wave limiter.
Currently these hints are used in the scheduler. If a function is suspected
to be memory bound we allow occupancy to decrease to 4 waves in the course
of scheduling.
Differential Revision: https://reviews.llvm.org/D46992
llvm-svn: 333289
diff --git a/llvm/lib/Target/AMDGPU/AMDGPU.h b/llvm/lib/Target/AMDGPU/AMDGPU.h
index 3fd5a6c..952ffc2 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPU.h
+++ b/llvm/lib/Target/AMDGPU/AMDGPU.h
@@ -136,6 +136,9 @@
void initializeAMDGPUUseNativeCallsPass(PassRegistry &);
extern char &AMDGPUUseNativeCallsID;
+void initializeAMDGPUPerfHintAnalysisPass(PassRegistry &);
+extern char &AMDGPUPerfHintAnalysisID;
+
// Passes common to R600 and SI
FunctionPass *createAMDGPUPromoteAlloca();
void initializeAMDGPUPromoteAllocaPass(PassRegistry&);