AMDGPU: Implement hook for InferAddressSpaces

For now just port some of the existing NVPTX tests
and from an old HSAIL optimization pass which
approximately did the same thing.

Don't enable the pass yet until more testing is done.

llvm-svn: 293580

1 files changed, 131 insertions, 0 deletions

diff --git a/llvm/test/Transforms/InferAddressSpaces/AMDGPU/basic.ll b/llvm/test/Transforms/InferAddressSpaces/AMDGPU/basic.ll
new file mode 100644
index 00000000000..4f938413d73
--- /dev/null
+++ b/llvm/test/Transforms/InferAddressSpaces/AMDGPU/basic.ll
@@ -0,0 +1,131 @@
+; RUN: opt -S -mtriple=amdgcn-amd-amdhsa -infer-address-spaces %s | FileCheck %s
+
+; Trivial optimization of generic addressing
+
+; CHECK-LABEL: @load_global_from_flat(
+; CHECK-NEXT: %tmp0 = addrspacecast float addrspace(4)* %generic_scalar to float addrspace(1)*
+; CHECK-NEXT: %tmp1 = load float, float addrspace(1)* %tmp0
+; CHECK-NEXT: ret float %tmp1
+define float @load_global_from_flat(float addrspace(4)* %generic_scalar) #0 {
+  %tmp0 = addrspacecast float addrspace(4)* %generic_scalar to float addrspace(1)*
+  %tmp1 = load float, float addrspace(1)* %tmp0
+  ret float %tmp1
+}
+
+; CHECK-LABEL: @load_constant_from_flat(
+; CHECK-NEXT: %tmp0 = addrspacecast float addrspace(4)* %generic_scalar to float addrspace(2)*
+; CHECK-NEXT: %tmp1 = load float, float addrspace(2)* %tmp0
+; CHECK-NEXT: ret float %tmp1
+define float @load_constant_from_flat(float addrspace(4)* %generic_scalar) #0 {
+  %tmp0 = addrspacecast float addrspace(4)* %generic_scalar to float addrspace(2)*
+  %tmp1 = load float, float addrspace(2)* %tmp0
+  ret float %tmp1
+}
+
+; CHECK-LABEL: @load_group_from_flat(
+; CHECK-NEXT: %tmp0 = addrspacecast float addrspace(4)* %generic_scalar to float addrspace(3)*
+; CHECK-NEXT: %tmp1 = load float, float addrspace(3)* %tmp0
+; CHECK-NEXT: ret float %tmp1
+define float @load_group_from_flat(float addrspace(4)* %generic_scalar) #0 {
+  %tmp0 = addrspacecast float addrspace(4)* %generic_scalar to float addrspace(3)*
+  %tmp1 = load float, float addrspace(3)* %tmp0
+  ret float %tmp1
+}
+
+; CHECK-LABEL: @load_private_from_flat(
+; CHECK-NEXT: %tmp0 = addrspacecast float addrspace(4)* %generic_scalar to float*
+; CHECK-NEXT: %tmp1 = load float, float* %tmp0
+; CHECK-NEXT: ret float %tmp1
+define float @load_private_from_flat(float addrspace(4)* %generic_scalar) #0 {
+  %tmp0 = addrspacecast float addrspace(4)* %generic_scalar to float*
+  %tmp1 = load float, float* %tmp0
+  ret float %tmp1
+}
+
+; CHECK-LABEL: @store_global_from_flat(
+; CHECK-NEXT: %tmp0 = addrspacecast float addrspace(4)* %generic_scalar to float addrspace(1)*
+; CHECK-NEXT: store float 0.000000e+00, float addrspace(1)* %tmp0
+define void @store_global_from_flat(float addrspace(4)* %generic_scalar) #0 {
+  %tmp0 = addrspacecast float addrspace(4)* %generic_scalar to float addrspace(1)*
+  store float 0.0, float addrspace(1)* %tmp0
+  ret void
+}
+
+; CHECK-LABEL: @store_group_from_flat(
+; CHECK-NEXT: %tmp0 = addrspacecast float addrspace(4)* %generic_scalar to float addrspace(3)*
+; CHECK-NEXT: store float 0.000000e+00, float addrspace(3)* %tmp0
+define void @store_group_from_flat(float addrspace(4)* %generic_scalar) #0 {
+  %tmp0 = addrspacecast float addrspace(4)* %generic_scalar to float addrspace(3)*
+  store float 0.0, float addrspace(3)* %tmp0
+  ret void
+}
+
+; CHECK-LABEL: @store_private_from_flat(
+; CHECK-NEXT: %tmp0 = addrspacecast float addrspace(4)* %generic_scalar to float*
+; CHECK-NEXT: store float 0.000000e+00, float* %tmp0
+define void @store_private_from_flat(float addrspace(4)* %generic_scalar) #0 {
+  %tmp0 = addrspacecast float addrspace(4)* %generic_scalar to float*
+  store float 0.0, float* %tmp0
+  ret void
+}
+
+; optimized to global load/store.
+; CHECK-LABEL: @load_store_global(
+; CHECK-NEXT: %val = load i32, i32 addrspace(1)* %input, align 4
+; CHECK-NEXT: store i32 %val, i32 addrspace(1)* %output, align 4
+; CHECK-NEXT: ret void
+define void @load_store_global(i32 addrspace(1)* nocapture %input, i32 addrspace(1)* nocapture %output) #0 {
+  %tmp0 = addrspacecast i32 addrspace(1)* %input to i32 addrspace(4)*
+  %tmp1 = addrspacecast i32 addrspace(1)* %output to i32 addrspace(4)*
+  %val = load i32, i32 addrspace(4)* %tmp0, align 4
+  store i32 %val, i32 addrspace(4)* %tmp1, align 4
+  ret void
+}
+
+; Optimized to group load/store.
+; CHECK-LABEL: @load_store_group(
+; CHECK-NEXT: %val = load i32, i32 addrspace(3)* %input, align 4
+; CHECK-NEXT: store i32 %val, i32 addrspace(3)* %output, align 4
+; CHECK-NEXT: ret void
+define void @load_store_group(i32 addrspace(3)* nocapture %input, i32 addrspace(3)* nocapture %output) #0 {
+  %tmp0 = addrspacecast i32 addrspace(3)* %input to i32 addrspace(4)*
+  %tmp1 = addrspacecast i32 addrspace(3)* %output to i32 addrspace(4)*
+  %val = load i32, i32 addrspace(4)* %tmp0, align 4
+  store i32 %val, i32 addrspace(4)* %tmp1, align 4
+  ret void
+}
+
+; Optimized to private load/store.
+; CHECK-LABEL: @load_store_private(
+; CHECK-NEXT: %val = load i32, i32* %input, align 4
+; CHECK-NEXT: store i32 %val, i32* %output, align 4
+; CHECK-NEXT: ret void
+define void @load_store_private(i32* nocapture %input, i32* nocapture %output) #0 {
+  %tmp0 = addrspacecast i32* %input to i32 addrspace(4)*
+  %tmp1 = addrspacecast i32* %output to i32 addrspace(4)*
+  %val = load i32, i32 addrspace(4)* %tmp0, align 4
+  store i32 %val, i32 addrspace(4)* %tmp1, align 4
+  ret void
+}
+
+; No optimization. flat load/store.
+; CHECK-LABEL: @load_store_flat(
+; CHECK-NEXT: %val = load i32, i32 addrspace(4)* %input, align 4
+; CHECK-NEXT: store i32 %val, i32 addrspace(4)* %output, align 4
+; CHECK-NEXT: ret void
+define void @load_store_flat(i32 addrspace(4)* nocapture %input, i32 addrspace(4)* nocapture %output) #0 {
+  %val = load i32, i32 addrspace(4)* %input, align 4
+  store i32 %val, i32 addrspace(4)* %output, align 4
+  ret void
+}
+
+; CHECK-LABEL: @store_addrspacecast_ptr_value(
+; CHECK: %cast = addrspacecast i32 addrspace(1)* %input to i32 addrspace(4)*
+; CHECK-NEXT: store i32 addrspace(4)* %cast, i32 addrspace(4)* addrspace(1)* %output, align 4
+define void @store_addrspacecast_ptr_value(i32 addrspace(1)* nocapture %input, i32 addrspace(4)* addrspace(1)* nocapture %output) #0 {
+  %cast = addrspacecast i32 addrspace(1)* %input to i32 addrspace(4)*
+  store i32 addrspace(4)* %cast, i32 addrspace(4)* addrspace(1)* %output, align 4
+  ret void
+}
+
+attributes #0 = { nounwind }