AMDGPU: Really implement getFrameRegister

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

llvm-svn: 328677

diff --git a/llvm/lib/Target/AMDGPU/AMDGPURegisterInfo.cpp b/llvm/lib/Target/AMDGPU/AMDGPURegisterInfo.cpp
index 376be7d..242b97b 100644 (file)
--- a/llvm/lib/Target/AMDGPU/AMDGPURegisterInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPURegisterInfo.cpp
@@ -82,5 +82,6 @@ const uint32_t *SIRegisterInfo::getCallPreservedMask(const MachineFunction &MF,
 }
 
 unsigned SIRegisterInfo::getFrameRegister(const MachineFunction &MF) const {
-  return AMDGPU::NoRegister;
+  const SIMachineFunctionInfo *FuncInfo = MF.getInfo<SIMachineFunctionInfo>();
+  return FuncInfo->getFrameOffsetReg();
 }

diff --git a/llvm/test/DebugInfo/AMDGPU/variable-locations.ll b/llvm/test/DebugInfo/AMDGPU/variable-locations.ll
index 692769b..66885f2 100644 (file)
--- a/llvm/test/DebugInfo/AMDGPU/variable-locations.ll
+++ b/llvm/test/DebugInfo/AMDGPU/variable-locations.ll
@@ -31,6 +31,9 @@ declare void @llvm.dbg.declare(metadata, metadata, metadata)
 ; 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)