[PATCH] D13967: AMDGPU: Don't reserve SCRATCH_PTR input register

[Matt Arsenault via llvm-commits]

arsenm created this revision.
arsenm added a reviewer: tstellarAMD.
arsenm added a subscriber: llvm-commits.
Herald added a subscriber: arsenm.

I don't think this has been doing anything since using relocations was added.

http://reviews.llvm.org/D13967

Files:
  lib/Target/AMDGPU/SIISelLowering.cpp
  test/CodeGen/AMDGPU/si-instr-info-correct-implicit-operands.ll

Index: test/CodeGen/AMDGPU/si-instr-info-correct-implicit-operands.ll
===================================================================
--- test/CodeGen/AMDGPU/si-instr-info-correct-implicit-operands.ll
+++ test/CodeGen/AMDGPU/si-instr-info-correct-implicit-operands.ll
@@ -3,7 +3,7 @@
 ; register operands in the correct order when modifying the opcode of an
 ; instruction to V_ADD_I32_e32.
 
-; CHECK: %19 = V_ADD_I32_e32 %13, %12, implicit-def %vcc, implicit %exec
+; CHECK: %{{[0-9]+}} = V_ADD_I32_e32 %{{[0-9]+}}, %{{[0-9]+}}, implicit-def %vcc, implicit %exec
 
 define void @test(i32 addrspace(1)* %out, i32 addrspace(1)* %in) {
 entry:
Index: lib/Target/AMDGPU/SIISelLowering.cpp
===================================================================
--- lib/Target/AMDGPU/SIISelLowering.cpp
+++ lib/Target/AMDGPU/SIISelLowering.cpp
@@ -596,19 +596,9 @@
     unsigned InputPtrRegHi =
         TRI->getPhysRegSubReg(InputPtrReg, &AMDGPU::SReg_32RegClass, 1);
 
-    unsigned ScratchPtrReg =
-        TRI->getPreloadedValue(MF, SIRegisterInfo::SCRATCH_PTR);
-    unsigned ScratchPtrRegLo =
-        TRI->getPhysRegSubReg(ScratchPtrReg, &AMDGPU::SReg_32RegClass, 0);
-    unsigned ScratchPtrRegHi =
-        TRI->getPhysRegSubReg(ScratchPtrReg, &AMDGPU::SReg_32RegClass, 1);
-
     CCInfo.AllocateReg(InputPtrRegLo);
     CCInfo.AllocateReg(InputPtrRegHi);
-    CCInfo.AllocateReg(ScratchPtrRegLo);
-    CCInfo.AllocateReg(ScratchPtrRegHi);
     MF.addLiveIn(InputPtrReg, &AMDGPU::SReg_64RegClass);
-    MF.addLiveIn(ScratchPtrReg, &AMDGPU::SReg_64RegClass);
     if (Subtarget->isAmdHsaOS()) {
       unsigned DispatchPtrReg =
           TRI->getPreloadedValue(MF, SIRegisterInfo::DISPATCH_PTR);


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