AMDGPU/SI: Move some ISel helpers into utils so they can be shared with GISel
Reviewers: arsenm
Reviewed By: arsenm
Subscribers: kzhuravl, wdng, nhaehnle, yaxunl, llvm-commits, tony-tye
Differential Revision: https://reviews.llvm.org/D29068
llvm-svn: 293321
diff --git a/llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp b/llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp
index 821f4e2..e4eaaba 100644
--- a/llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp
@@ -9,7 +9,9 @@
#include "AMDGPUBaseInfo.h"
#include "AMDGPU.h"
#include "SIDefines.h"
+#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Constants.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/MC/MCContext.h"
@@ -463,5 +465,32 @@
Val == 0x3118; // 1/2pi
}
+bool isUniformMMO(const MachineMemOperand *MMO) {
+ const Value *Ptr = MMO->getValue();
+ // UndefValue means this is a load of a kernel input. These are uniform.
+ // Sometimes LDS instructions have constant pointers.
+ // If Ptr is null, then that means this mem operand contains a
+ // PseudoSourceValue like GOT.
+ if (!Ptr || isa<UndefValue>(Ptr) || isa<Argument>(Ptr) ||
+ isa<Constant>(Ptr) || isa<GlobalValue>(Ptr))
+ return true;
+
+ const Instruction *I = dyn_cast<Instruction>(Ptr);
+ return I && I->getMetadata("amdgpu.uniform");
+}
+
+int64_t getSMRDEncodedOffset(const MCSubtargetInfo &ST, int64_t ByteOffset) {
+ if (isSI(ST) || isCI(ST))
+ return ByteOffset >> 2;
+
+ return ByteOffset;
+}
+
+bool isLegalSMRDImmOffset(const MCSubtargetInfo &ST, int64_t ByteOffset) {
+ int64_t EncodedOffset = getSMRDEncodedOffset(ST, ByteOffset);
+ return isSI(ST) || isCI(ST) ? isUInt<8>(EncodedOffset) :
+ isUInt<20>(EncodedOffset);
+}
+
} // End namespace AMDGPU
} // End namespace llvm