[amdgpu][nfc] Replace ad hoc LDS frame recalculation with absolute_symbol MD

Post ISel, LDS variables are absolute values. Representing them as
such is simpler than the frame recalculation currently used to build assembler
tables from their addresses.

This is a precursor to lowering dynamic/external LDS accesses from non-kernel
functions.

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D144221

1 files changed, 1 insertions, 13 deletions

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUMachineFunction.h b/llvm/lib/Target/AMDGPU/AMDGPUMachineFunction.h
index f27f825..ba4c55a 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUMachineFunction.h
+++ b/llvm/lib/Target/AMDGPU/AMDGPUMachineFunction.h
@@ -106,20 +106,8 @@ public:
 
   void allocateKnownAddressLDSGlobal(const Function &F);
 
-  // A kernel function may have an associated LDS allocation, and a kernel-scope
-  // LDS allocation must have an associated kernel function
-
-  // LDS allocation should have an associated kernel function
-  static const Function *
-  getKernelLDSFunctionFromGlobal(const GlobalVariable &GV);
-  static const GlobalVariable *
-  getKernelLDSGlobalFromFunction(const Function &F);
-
-  // Module or kernel scope LDS variable
-  static bool isKnownAddressLDSGlobal(const GlobalVariable &GV);
-  static unsigned calculateKnownAddressOfLDSGlobal(const GlobalVariable &GV);
-
   static std::optional<uint32_t> getLDSKernelIdMetadata(const Function &F);
+  static std::optional<uint32_t> getLDSAbsoluteAddress(const GlobalValue &GV);
 
   Align getDynLDSAlign() const { return DynLDSAlign; }