[PATCH] D44952: AMDGPU: Really implement getFrameRegister

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: kzhuravl, rampitec.
Herald added subscribers: JDevlieghere, t-tye, tpr, dstuttard, aprantl, yaxunl, nhaehnle, wdng.

Currently this seems to only really be used for debug info.


https://reviews.llvm.org/D44952

Files:
  lib/Target/AMDGPU/AMDGPURegisterInfo.cpp
  test/DebugInfo/AMDGPU/variable-locations.ll


Index: test/DebugInfo/AMDGPU/variable-locations.ll
===================================================================
--- test/DebugInfo/AMDGPU/variable-locations.ll
+++ test/DebugInfo/AMDGPU/variable-locations.ll
@@ -31,6 +31,9 @@
 ; CHECK-NEXT: DW_AT_location [DW_FORM_block1] (DW_OP_addr 0x0)
 @GlobB = common addrspace(1) global i32 0, align 4, !dbg !6
 
+; CHECK: {{.*}}DW_TAG_subprogram
+; CHECK: DW_AT_frame_base [DW_FORM_block1]	(DW_OP_reg9 SGPR9)
+
 define amdgpu_kernel void @kernel1(
 ; CHECK: {{.*}}DW_TAG_formal_parameter
 ; CHECK-NEXT: DW_AT_location [DW_FORM_block1] (DW_OP_fbreg +4, DW_OP_constu 0x1, DW_OP_swap, DW_OP_xderef)
Index: lib/Target/AMDGPU/AMDGPURegisterInfo.cpp
===================================================================
--- lib/Target/AMDGPU/AMDGPURegisterInfo.cpp
+++ lib/Target/AMDGPU/AMDGPURegisterInfo.cpp
@@ -82,5 +82,6 @@
 }
 
 unsigned SIRegisterInfo::getFrameRegister(const MachineFunction &MF) const {
-  return AMDGPU::NoRegister;
+  const SIMachineFunctionInfo *FuncInfo = MF.getInfo<SIMachineFunctionInfo>();
+  return FuncInfo->getFrameOffsetReg();
 }


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