[AMDGPU] Fix pointer info for pseudo source for r600

[yaxunl]

Summary

The pointer info for pseudo source for r600 is not correct when
alloca addr space is not 0, which causes invalid SDNode for r600---amdgiz.

This patch fixes that.

[yaxunl]

Remove unnecessary changes to CodeGen since the PointerInfo can be inferred.

[yaxunl]

Ping. D39698 depends on this.

[tstellar]

Why are we trying to use this alternative address space mapping for r600?

[jsjodin]

lib/Target/AMDGPU/R600InstrInfo.cpp

1511 ↗

(On Diff #121772)

I think you will need a return at the end of the function because I remember seeing some warnings on some buildbots. You can double check. Otherwise it looks good to me.

[yaxunl]

In D39670#917974, @tstellar wrote:

Why are we trying to use this alternative address space mapping for r600?

We need to simplify the backend to support only one address space mapping. Supporting multiple address space mapping causes unnecessary complexity in the backend, e.g. intrinsic functions returning different pointer types based on triple, etc.

[tstellar]

Which intrinsic functions are you refering to? To me it seems easier to not touch r600 at all, but I guess I'm not as deep into the code as you. Can you give me some specific examples for how adding support to r600 for this alternative mapping simplifies the backend?

[yaxunl]

Revised by Jan's comment.

[yaxunl]

In D39670#918042, @tstellar wrote:

Which intrinsic functions are you refering to? To me it seems easier to not touch r600 at all, but I guess I'm not as deep into the code as you. Can you give me some specific examples for how adding support to r600 for this alternative mapping simplifies the backend?

For example, if we want to define a intrinsic function returning generic pointer, we have to define two versions. one for amdgiz environment, one for other environment, because they have different address space value for generic pointer. And we have to let the backend choose which version based on target environment.

Also, because address space values depends on target triple, we can not define them as constants. Instead it has to be a structure returned by function getAMDGPUAS(triple) and use it. If we only supports one address space mapping, we can define it as an enum and use it.

[yaxunl]

In D39670#918093, @yaxunl wrote:

In D39670#918042, @tstellar wrote:

Which intrinsic functions are you refering to? To me it seems easier to not touch r600 at all, but I guess I'm not as deep into the code as you. Can you give me some specific examples for how adding support to r600 for this alternative mapping simplifies the backend?

For example, if we want to define a intrinsic function returning generic pointer, we have to define two versions. one for amdgiz environment, one for other environment, because they have different address space value for generic pointer. And we have to let the backend choose which version based on target environment.

Also, because address space values depends on target triple, we can not define them as constants. Instead it has to be a structure returned by function getAMDGPUAS(triple) and use it. If we only supports one address space mapping, we can define it as an enum and use it.

Sorry I forgot to mention: the plan is to let amdgcn and r600 only support the new address space mapping, then make it default and remove the old address space mapping.

[tstellar]

r600 doesn't support generic address space, so in that case, I would recommend only defining an intrinsic to be used by amdgcn. I understand the problem with non-constant address spaces, but I think the best solution here would be to try to make more of a separation between the amdgcn code and the r600 code in the backend rather than trying to change the address space mapping for r600. r600 should really be mostly read-only at this point.

[yaxunl]

In D39670#918112, @tstellar wrote:

r600 doesn't support generic address space, so in that case, I would recommend only defining an intrinsic to be used by amdgcn. I understand the problem with non-constant address spaces, but I think the best solution here would be to try to make more of a separation between the amdgcn code and the r600 code in the backend rather than trying to change the address space mapping for r600. r600 should really be mostly read-only at this point.

We discussed this internally and concluded that having a static address space mapping is more important. Most of issues are due to using dummy pointer info. Such places should be few in r600 code, therefore we will continue fixing these issues unless we found there need excessive efforts to do so.

[tstellar]

In D39670#918887, @yaxunl wrote:

We discussed this internally and concluded that having a static address space mapping is more important. Most of issues are due to using dummy pointer info. Such places should be few in r600 code, therefore we will continue fixing these issues unless we found there need excessive efforts to do so.

It would be nice to have these discussions on the mailing list so more people could participate, and it would be helpful for convincing people like me that this is the right approach, but as of right now I don't see why it is so important to have a static address space mapping that is the same for r600 and amdgcn. I think the better approach would be to share less code between the two subtargets such that it's possible for each to have their own static mapping. I think this kind of code separation is something should be done anyway independent of address space mapping work.

[arsenm]

I think the chance of R600 breaking with a different address space mapping is much higher. I think it is important to have the one static mapping that is consistent.

[arsenm]

LGTM with the switch fix. Also could just move the SI one to AMDGPUInstrInfo

lib/Target/AMDGPU/R600InstrInfo.cpp

1511 ↗

(On Diff #121927)

Move unreachable into default and remove the final return

[yaxunl]

In D39670#918904, @tstellar wrote:

In D39670#918887, @yaxunl wrote:

We discussed this internally and concluded that having a static address space mapping is more important. Most of issues are due to using dummy pointer info. Such places should be few in r600 code, therefore we will continue fixing these issues unless we found there need excessive efforts to do so.

It would be nice to have these discussions on the mailing list so more people could participate, and it would be helpful for convincing people like me that this is the right approach, but as of right now I don't see why it is so important to have a static address space mapping that is the same for r600 and amdgcn. I think the better approach would be to share less code between the two subtargets such that it's possible for each to have their own static mapping. I think this kind of code separation is something should be done anyway independent of address space mapping work.

As Matt said, the risk of having two sets of address space mapping is high. Also I estimate the workload to switch r600 to the new addr space mapping is moderate. On the hand, the workload for separating r600 from amdgcn is high.

In D39670#918904, @tstellar wrote:

In D39670#918887, @yaxunl wrote:

We discussed this internally and concluded that having a static address space mapping is more important. Most of issues are due to using dummy pointer info. Such places should be few in r600 code, therefore we will continue fixing these issues unless we found there need excessive efforts to do so.

It would be nice to have these discussions on the mailing list so more people could participate, and it would be helpful for convincing people like me that this is the right approach, but as of right now I don't see why it is so important to have a static address space mapping that is the same for r600 and amdgcn. I think the better approach would be to share less code between the two subtargets such that it's possible for each to have their own static mapping. I think this kind of code separation is something should be done anyway independent of address space mapping work.

r600 and amdgcn share lots of passes. It is not practical to duplicate these passes and maintain them separately. Even if we were able to do that, maintaining two sets of static address space is error prone. On the other hand, let r600 switching to the new address space mapping takes only moderate efforts since it is only address space number change. We will fix the regressions arising from this change. After this change, we will get a more consistent and bug-free AMDGPU backend.

[tstellar]

! In D39670#919711, @yaxunl wrote:

As Matt said, the risk of having two sets of address space mapping is high. Also I estimate the workload to switch r600 to the new addr space mapping is moderate. On the hand, the workload for separating r600 from amdgcn is high.

I disagree with this, but it's also possible I'm wrong. If you are willing to do the work and deal with the fallout, then I'm OK with this change. Just make sure @jvesely is aware so he can help test/check for regressions.

One problem I have with this specific test is you are essentially removing a test for the current mapping and replacing it with a test for the new mapping, even though the new mapping isn't actually being used anywhere outside of LLVM. What is your timeframe for migrating r600 to the new mapping?

r600 and amdgcn share lots of passes. It is not practical to duplicate these passes and maintain them separately. Even if we were able to do that, maintaining two sets of static address space is error prone. On the other hand, let r600 switching to the new address space mapping takes only moderate efforts since it is only address space number change. We will fix the regressions arising from this change. After this change, we will get a more consistent and bug-free AMDGPU backend.

I started a branch to split these two apart and it wasn't as bad as I thought it would be. I think long term this where we want to go with the backend. Maybe at some point I'll get a chance to clean this branch up and send out the patches.

[yaxunl]

In D39670#920596, @tstellar wrote:

! In D39670#919711, @yaxunl wrote:

As Matt said, the risk of having two sets of address space mapping is high. Also I estimate the workload to switch r600 to the new addr space mapping is moderate. On the hand, the workload for separating r600 from amdgcn is high.

I disagree with this, but it's also possible I'm wrong. If you are willing to do the work and deal with the fallout, then I'm OK with this change. Just make sure @jvesely is aware so he can help test/check for regressions.

Sure. I will keep Jan updated.

One problem I have with this specific test is you are essentially removing a test for the current mapping and replacing it with a test for the new mapping, even though the new mapping isn't actually being used anywhere outside of LLVM. What is your timeframe for migrating r600 to the new mapping?

I plan to get it done ASAP. Hopefully in one month. I think the new address space mapping and old address space mapping share most of the code path in llvm/clang, so any regression for the old address space mapping is likely causes regression in the new address space mapping. On the other hand, since new address space mapping has non-zero alloca address space therefore some extra code path, regressions in new address space mapping may not cause regressions in old address space mapping.

[yaxunl]

lib/Target/AMDGPU/R600InstrInfo.cpp

1511 ↗

(On Diff #121927)

Doing this causes an error:

error: default label in switch which covers all enumeration values [-Werror,-Wcovered-switch-default]

llvm/trunk/lib/Target/AMDGPU/R600InstrInfo.h

public:
   // Helper functions that check the opcode for status information
   bool isRegisterStore(const MachineInstr &MI) const {
     return get(MI.getOpcode()).TSFlags & R600InstrFlags::REGISTER_STORE;
   }
 
   bool isRegisterLoad(const MachineInstr &MI) const {
     return get(MI.getOpcode()).TSFlags & R600InstrFlags::REGISTER_LOAD;
   }
+
+  unsigned getAddressSpaceForPseudoSourceKind(
+      PseudoSourceValue::PSVKind Kind) const override;
 };
 
 namespace AMDGPU {
 
 int getLDSNoRetOp(uint16_t Opcode);
 
 } //End namespace AMDGPU
 
 } // End llvm namespace
 
 #endif

llvm/trunk/lib/Target/AMDGPU/R600InstrInfo.cpp

if (HAS_NATIVE_OPERANDS(TargetFlags)) {
     FlagOp.setImm(0);
   } else {
     MachineOperand &FlagOp = getFlagOp(MI);
     unsigned InstFlags = FlagOp.getImm();
     InstFlags &= ~(Flag << (NUM_MO_FLAGS * Operand));
     FlagOp.setImm(InstFlags);
   }
 }
+
+unsigned R600InstrInfo::getAddressSpaceForPseudoSourceKind(
+    PseudoSourceValue::PSVKind Kind) const {
+  switch (Kind) {
+  case PseudoSourceValue::Stack:
+  case PseudoSourceValue::FixedStack:
+    return AMDGPUASI.PRIVATE_ADDRESS;
+  case PseudoSourceValue::ConstantPool:
+  case PseudoSourceValue::GOT:
+  case PseudoSourceValue::JumpTable:
+  case PseudoSourceValue::GlobalValueCallEntry:
+  case PseudoSourceValue::ExternalSymbolCallEntry:
+  case PseudoSourceValue::TargetCustom:
+    return AMDGPUASI.CONSTANT_ADDRESS;
+  }
+  llvm_unreachable("Invalid pseudo source kind");
+  return AMDGPUASI.PRIVATE_ADDRESS;
+}

llvm/trunk/test/CodeGen/AMDGPU/load-constant-i1.ll

-; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=FUNC %s
-; RUN: llc -march=amdgcn -mcpu=tonga -mattr=-flat-for-global -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=FUNC %s
-; RUN: llc -march=r600 -mcpu=cypress < %s | FileCheck -check-prefix=EG -check-prefix=FUNC %s
+; RUN: llc -march=amdgcn -mtriple=amdgcn---amdgiz -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=FUNC %s
+; RUN: llc -march=amdgcn -mtriple=amdgcn---amdgiz -mcpu=tonga -mattr=-flat-for-global -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=FUNC %s
+; RUN: llc -march=r600 -mtriple=r600---amdgiz -mcpu=cypress < %s | FileCheck -check-prefix=EG -check-prefix=FUNC %s
 
 ; FUNC-LABEL: {{^}}constant_load_i1:
 ; GCN: buffer_load_ubyte
 ; GCN: v_and_b32_e32 v{{[0-9]+}}, 1
 ; GCN: buffer_store_byte
 
 ; EG: VTX_READ_8
 ; EG: AND_INT

llvm/trunk/test/CodeGen/AMDGPU/load-global-i1.ll

-; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=FUNC %s
-; RUN: llc -march=amdgcn -mcpu=tonga -mattr=-flat-for-global -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=FUNC %s
-; RUN: llc -march=r600 -mcpu=cypress < %s | FileCheck -check-prefix=EG -check-prefix=FUNC %s
+; RUN: llc -march=amdgcn -mtriple=amdgcn---amdgiz -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=FUNC %s
+; RUN: llc -march=amdgcn -mtriple=amdgcn---amdgiz -mcpu=tonga -mattr=-flat-for-global -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=FUNC %s
+; RUN: llc -march=r600 -mtriple=r600---amdgiz -mcpu=cypress < %s | FileCheck -check-prefix=EG -check-prefix=FUNC %s
 
 ; FUNC-LABEL: {{^}}global_load_i1:
 ; GCN: buffer_load_ubyte
 ; GCN: v_and_b32_e32 v{{[0-9]+}}, 1
 ; GCN: buffer_store_byte
 
 ; EG: VTX_READ_8
 ; EG: AND_INT

llvm/trunk/test/CodeGen/AMDGPU/load-local-i1.ll

-; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=FUNC %s
-; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=FUNC %s
-; RUN: llc -march=r600 -mcpu=cypress < %s | FileCheck -check-prefix=EG -check-prefix=FUNC %s
+; RUN: llc -march=amdgcn -mtriple=amdgcn---amdgiz -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=FUNC %s
+; RUN: llc -march=amdgcn -mtriple=amdgcn---amdgiz -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=FUNC %s
+; RUN: llc -march=r600 -mtriple=r600---amdgiz -mcpu=cypress < %s | FileCheck -check-prefix=EG -check-prefix=FUNC %s
 
 ; FUNC-LABEL: {{^}}local_load_i1:
 ; GCN: ds_read_u8
 ; GCN: v_and_b32_e32 v{{[0-9]+}}, 1
 ; GCN: ds_write_b8
 
 ; EG: LDS_UBYTE_READ_RET
 ; EG: AND_INT

llvm/trunk/test/CodeGen/AMDGPU/vector-alloca.ll

-; RUN: llc -march=amdgcn -mcpu=verde -mattr=-promote-alloca -verify-machineinstrs < %s | FileCheck -check-prefix=SI-ALLOCA -check-prefix=SI -check-prefix=FUNC %s
-; RUN: llc -march=amdgcn -mcpu=verde -mattr=+promote-alloca -verify-machineinstrs < %s | FileCheck -check-prefix=SI-PROMOTE -check-prefix=SI -check-prefix=FUNC %s
-; RUN: llc -march=amdgcn -mcpu=tonga -mattr=-promote-alloca -verify-machineinstrs < %s | FileCheck -check-prefix=SI-ALLOCA -check-prefix=SI -check-prefix=FUNC %s
-; RUN: llc -march=amdgcn -mcpu=tonga -mattr=+promote-alloca -verify-machineinstrs < %s | FileCheck -check-prefix=SI-PROMOTE -check-prefix=SI -check-prefix=FUNC %s
-; RUN: llc -march=r600 -mcpu=redwood < %s | FileCheck --check-prefix=EG -check-prefix=FUNC %s
-; RUN: opt -S -mtriple=amdgcn-- -amdgpu-promote-alloca -sroa -instcombine < %s | FileCheck -check-prefix=OPT %s
+; RUN: llc -march=amdgcn -mtriple=amdgcn---amdgiz -mcpu=verde -mattr=-promote-alloca -verify-machineinstrs < %s | FileCheck -check-prefix=SI-ALLOCA -check-prefix=SI -check-prefix=FUNC %s
+; RUN: llc -march=amdgcn -mtriple=amdgcn---amdgiz -mcpu=verde -mattr=+promote-alloca -verify-machineinstrs < %s | FileCheck -check-prefix=SI-PROMOTE -check-prefix=SI -check-prefix=FUNC %s
+; RUN: llc -march=amdgcn -mtriple=amdgcn---amdgiz -mcpu=tonga -mattr=-promote-alloca -verify-machineinstrs < %s | FileCheck -check-prefix=SI-ALLOCA -check-prefix=SI -check-prefix=FUNC %s
+; RUN: llc -march=amdgcn -mtriple=amdgcn---amdgiz -mcpu=tonga -mattr=+promote-alloca -verify-machineinstrs < %s | FileCheck -check-prefix=SI-PROMOTE -check-prefix=SI -check-prefix=FUNC %s
+; RUN: llc -march=r600 -mtriple=r600---amdgiz -mcpu=redwood < %s | FileCheck --check-prefix=EG -check-prefix=FUNC %s
+; RUN: opt -S -mtriple=amdgcn---amdgiz -amdgpu-promote-alloca -sroa -instcombine < %s | FileCheck -check-prefix=OPT %s
+target datalayout = "A5"
 
 ; OPT-LABEL: @vector_read(
 ; OPT: %0 = extractelement <4 x i32> <i32 0, i32 1, i32 2, i32 3>, i32 %index
 ; OPT: store i32 %0, i32 addrspace(1)* %out, align 4
 
 ; FUNC-LABEL: {{^}}vector_read:
 ; EG: MOV
 ; EG: MOV
 ; EG: MOV
 ; EG: MOV
 ; EG: MOVA_INT
 define amdgpu_kernel void @vector_read(i32 addrspace(1)* %out, i32 %index) {
 entry:
-  %tmp = alloca [4 x i32]
-  %x = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 0
-  %y = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 1
-  %z = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 2
-  %w = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 3
-  store i32 0, i32* %x
-  store i32 1, i32* %y
-  store i32 2, i32* %z
-  store i32 3, i32* %w
-  %tmp1 = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 %index
-  %tmp2 = load i32, i32* %tmp1
+  %tmp = alloca [4 x i32], addrspace(5)
+  %x = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 0
+  %y = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 1
+  %z = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 2
+  %w = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 3
+  store i32 0, i32 addrspace(5)* %x
+  store i32 1, i32 addrspace(5)* %y
+  store i32 2, i32 addrspace(5)* %z
+  store i32 3, i32 addrspace(5)* %w
+  %tmp1 = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 %index
+  %tmp2 = load i32, i32 addrspace(5)* %tmp1
   store i32 %tmp2, i32 addrspace(1)* %out
   ret void
 }
 
 ; OPT-LABEL: @vector_write(
 ; OPT: %0 = insertelement <4 x i32> zeroinitializer, i32 1, i32 %w_index
 ; OPT: %1 = extractelement <4 x i32> %0, i32 %r_index
 ; OPT: store i32 %1, i32 addrspace(1)* %out, align 4
 
 ; FUNC-LABEL: {{^}}vector_write:
 ; EG: MOV
 ; EG: MOV
 ; EG: MOV
 ; EG: MOV
 ; EG: MOVA_INT
 ; EG: MOVA_INT
 define amdgpu_kernel void @vector_write(i32 addrspace(1)* %out, i32 %w_index, i32 %r_index) {
 entry:
-  %tmp = alloca [4 x i32]
-  %x = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 0
-  %y = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 1
-  %z = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 2
-  %w = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 3
-  store i32 0, i32* %x
-  store i32 0, i32* %y
-  store i32 0, i32* %z
-  store i32 0, i32* %w
-  %tmp1 = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 %w_index
-  store i32 1, i32* %tmp1
-  %tmp2 = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 %r_index
-  %tmp3 = load i32, i32* %tmp2
+  %tmp = alloca [4 x i32], addrspace(5)
+  %x = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 0
+  %y = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 1
+  %z = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 2
+  %w = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 3
+  store i32 0, i32 addrspace(5)* %x
+  store i32 0, i32 addrspace(5)* %y
+  store i32 0, i32 addrspace(5)* %z
+  store i32 0, i32 addrspace(5)* %w
+  %tmp1 = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 %w_index
+  store i32 1, i32 addrspace(5)* %tmp1
+  %tmp2 = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 %r_index
+  %tmp3 = load i32, i32 addrspace(5)* %tmp2
   store i32 %tmp3, i32 addrspace(1)* %out
   ret void
 }
 
 ; This test should be optimize to:
 ; store i32 0, i32 addrspace(1)* %out
 
 ; OPT-LABEL: @bitcast_gep(
 ; OPT-LABEL: store i32 0, i32 addrspace(1)* %out, align 4
 
 ; FUNC-LABEL: {{^}}bitcast_gep:
 ; EG: STORE_RAW
 define amdgpu_kernel void @bitcast_gep(i32 addrspace(1)* %out, i32 %w_index, i32 %r_index) {
 entry:
-  %tmp = alloca [4 x i32]
-  %x = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 0
-  %y = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 1
-  %z = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 2
-  %w = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 3
-  store i32 0, i32* %x
-  store i32 0, i32* %y
-  store i32 0, i32* %z
-  store i32 0, i32* %w
-  %tmp1 = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 1
-  %tmp2 = bitcast i32* %tmp1 to [4 x i32]*
-  %tmp3 = getelementptr [4 x i32], [4 x i32]* %tmp2, i32 0, i32 0
-  %tmp4 = load i32, i32* %tmp3
+  %tmp = alloca [4 x i32], addrspace(5)
+  %x = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 0
+  %y = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 1
+  %z = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 2
+  %w = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 3
+  store i32 0, i32 addrspace(5)* %x
+  store i32 0, i32 addrspace(5)* %y
+  store i32 0, i32 addrspace(5)* %z
+  store i32 0, i32 addrspace(5)* %w
+  %tmp1 = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 1
+  %tmp2 = bitcast i32 addrspace(5)* %tmp1 to [4 x i32] addrspace(5)*
+  %tmp3 = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp2, i32 0, i32 0
+  %tmp4 = load i32, i32 addrspace(5)* %tmp3
   store i32 %tmp4, i32 addrspace(1)* %out
   ret void
 }
 
 ; OPT-LABEL: @vector_read_bitcast_gep(
 ; OPT: %0 = extractelement <4 x i32> <i32 1065353216, i32 1, i32 2, i32 3>, i32 %index
 ; OPT: store i32 %0, i32 addrspace(1)* %out, align 4
 define amdgpu_kernel void @vector_read_bitcast_gep(i32 addrspace(1)* %out, i32 %index) {
 entry:
-  %tmp = alloca [4 x i32]
-  %x = getelementptr inbounds [4 x i32], [4 x i32]* %tmp, i32 0, i32 0
-  %y = getelementptr inbounds [4 x i32], [4 x i32]* %tmp, i32 0, i32 1
-  %z = getelementptr inbounds [4 x i32], [4 x i32]* %tmp, i32 0, i32 2
-  %w = getelementptr inbounds [4 x i32], [4 x i32]* %tmp, i32 0, i32 3
-  %bc = bitcast i32* %x to float*
-  store float 1.0, float* %bc
-  store i32 1, i32* %y
-  store i32 2, i32* %z
-  store i32 3, i32* %w
-  %tmp1 = getelementptr inbounds [4 x i32], [4 x i32]* %tmp, i32 0, i32 %index
-  %tmp2 = load i32, i32* %tmp1
+  %tmp = alloca [4 x i32], addrspace(5)
+  %x = getelementptr inbounds [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 0
+  %y = getelementptr inbounds [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 1
+  %z = getelementptr inbounds [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 2
+  %w = getelementptr inbounds [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 3
+  %bc = bitcast i32 addrspace(5)* %x to float addrspace(5)*
+  store float 1.0, float addrspace(5)* %bc
+  store i32 1, i32 addrspace(5)* %y
+  store i32 2, i32 addrspace(5)* %z
+  store i32 3, i32 addrspace(5)* %w
+  %tmp1 = getelementptr inbounds [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 %index
+  %tmp2 = load i32, i32 addrspace(5)* %tmp1
   store i32 %tmp2, i32 addrspace(1)* %out
   ret void
 }
 
 ; FIXME: Should be able to promote this. Instcombine should fold the
 ; cast in the hasOneUse case so it might not matter in practice
 
 ; OPT-LABEL: @vector_read_bitcast_alloca(
 ; OPT: alloca [4 x float]
 ; OPT: store float
 ; OPT: store float
 ; OPT: store float
 ; OPT: store float
 ; OPT: load float
 define amdgpu_kernel void @vector_read_bitcast_alloca(float addrspace(1)* %out, i32 %index) {
 entry:
-  %tmp = alloca [4 x i32]
-  %tmp.bc = bitcast [4 x i32]* %tmp to [4 x float]*
-  %x = getelementptr inbounds [4 x float], [4 x float]* %tmp.bc, i32 0, i32 0
-  %y = getelementptr inbounds [4 x float], [4 x float]* %tmp.bc, i32 0, i32 1
-  %z = getelementptr inbounds [4 x float], [4 x float]* %tmp.bc, i32 0, i32 2
-  %w = getelementptr inbounds [4 x float], [4 x float]* %tmp.bc, i32 0, i32 3
-  store float 0.0, float* %x
-  store float 1.0, float* %y
-  store float 2.0, float* %z
-  store float 4.0, float* %w
-  %tmp1 = getelementptr inbounds [4 x float], [4 x float]* %tmp.bc, i32 0, i32 %index
-  %tmp2 = load float, float* %tmp1
+  %tmp = alloca [4 x i32], addrspace(5)
+  %tmp.bc = bitcast [4 x i32] addrspace(5)* %tmp to [4 x float] addrspace(5)*
+  %x = getelementptr inbounds [4 x float], [4 x float] addrspace(5)* %tmp.bc, i32 0, i32 0
+  %y = getelementptr inbounds [4 x float], [4 x float] addrspace(5)* %tmp.bc, i32 0, i32 1
+  %z = getelementptr inbounds [4 x float], [4 x float] addrspace(5)* %tmp.bc, i32 0, i32 2
+  %w = getelementptr inbounds [4 x float], [4 x float] addrspace(5)* %tmp.bc, i32 0, i32 3
+  store float 0.0, float addrspace(5)* %x
+  store float 1.0, float addrspace(5)* %y
+  store float 2.0, float addrspace(5)* %z
+  store float 4.0, float addrspace(5)* %w
+  %tmp1 = getelementptr inbounds [4 x float], [4 x float] addrspace(5)* %tmp.bc, i32 0, i32 %index
+  %tmp2 = load float, float addrspace(5)* %tmp1
   store float %tmp2, float addrspace(1)* %out
   ret void
 }
 
 ; The pointer arguments in local address space should not affect promotion to vector.
 
 ; OPT-LABEL: @vector_read_with_local_arg(
 ; OPT: %0 = extractelement <4 x i32> <i32 0, i32 1, i32 2, i32 3>, i32 %index
 ; OPT: store i32 %0, i32 addrspace(1)* %out, align 4
 define amdgpu_kernel void @vector_read_with_local_arg(i32 addrspace(3)* %stopper, i32 addrspace(1)* %out, i32 %index) {
 entry:
-  %tmp = alloca [4 x i32]
-  %x = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 0
-  %y = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 1
-  %z = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 2
-  %w = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 3
-  store i32 0, i32* %x
-  store i32 1, i32* %y
-  store i32 2, i32* %z
-  store i32 3, i32* %w
-  %tmp1 = getelementptr [4 x i32], [4 x i32]* %tmp, i32 0, i32 %index
-  %tmp2 = load i32, i32* %tmp1
+  %tmp = alloca [4 x i32], addrspace(5)
+  %x = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 0
+  %y = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 1
+  %z = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 2
+  %w = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 3
+  store i32 0, i32 addrspace(5)* %x
+  store i32 1, i32 addrspace(5)* %y
+  store i32 2, i32 addrspace(5)* %z
+  store i32 3, i32 addrspace(5)* %w
+  %tmp1 = getelementptr [4 x i32], [4 x i32] addrspace(5)* %tmp, i32 0, i32 %index
+  %tmp2 = load i32, i32 addrspace(5)* %tmp1
   store i32 %tmp2, i32 addrspace(1)* %out
   ret void
 }