1 files changed, 87 insertions, 0 deletions
diff --git a/test/CodeGen/R600/scratch-buffer.ll b/test/CodeGen/R600/scratch-buffer.ll
new file mode 100644
index 0000000..8c5a990
--- /dev/null
+++ b/test/CodeGen/R600/scratch-buffer.ll
@@ -0,0 +1,87 @@
+; RUN: llc -verify-machineinstrs -march=amdgcn -mcpu=SI < %s | FileCheck %s
+; RUN: llc -verify-machineinstrs -march=amdgcn -mcpu=tonga < %s | FileCheck %s
+
+; When a frame index offset is more than 12-bits, make sure we don't store
+; it in mubuf's offset field.
+
+; Also, make sure we use the same register for storing the scratch buffer addresss
+; for both stores. This register is allocated by the register scavenger, so we
+; should be able to reuse the same regiser for each scratch buffer access.
+
+; CHECK-LABEL: {{^}}legal_offset_fi:
+; CHECK: v_mov_b32_e32 [[OFFSET:v[0-9]+]], 0{{$}}
+; CHECK: buffer_store_dword v{{[0-9]+}}, [[OFFSET]], s[{{[0-9]+}}:{{[0-9]+}}], s{{[0-9]+}} offen
+; CHECK: v_mov_b32_e32 [[OFFSET]], 0x8000
+; CHECK: buffer_store_dword v{{[0-9]+}}, [[OFFSET]], s[{{[0-9]+}}:{{[0-9]+}}], s{{[0-9]+}} offen{{$}}
+
+define void @legal_offset_fi(i32 addrspace(1)* %out, i32 %cond, i32 %if_offset, i32 %else_offset) {
+entry:
+  %scratch0 = alloca [8192 x i32]
+  %scratch1 = alloca [8192 x i32]
+
+  %scratchptr0 = getelementptr [8192 x i32]* %scratch0, i32 0, i32 0
+  store i32 1, i32* %scratchptr0
+
+  %scratchptr1 = getelementptr [8192 x i32]* %scratch1, i32 0, i32 0
+  store i32 2, i32* %scratchptr1
+
+  %cmp = icmp eq i32 %cond, 0
+  br i1 %cmp, label %if, label %else
+
+if:
+  %if_ptr = getelementptr [8192 x i32]* %scratch0, i32 0, i32 %if_offset
+  %if_value = load i32* %if_ptr
+  br label %done
+
+else:
+  %else_ptr = getelementptr [8192 x i32]* %scratch1, i32 0, i32 %else_offset
+  %else_value = load i32* %else_ptr
+  br label %done
+
+done:
+  %value = phi i32 [%if_value, %if], [%else_value, %else]
+  store i32 %value, i32 addrspace(1)* %out
+  ret void
+
+  ret void
+
+}
+
+; CHECK-LABEL: {{^}}legal_offset_fi_offset
+; CHECK: buffer_store_dword v{{[0-9]+}}, v{{[0-9]+}}, s[{{[0-9]+}}:{{[0-9]+}}], s{{[0-9]+}} offen
+; CHECK: v_add_i32_e32 [[OFFSET:v[0-9]+]], 0x8000
+; CHECK: buffer_store_dword v{{[0-9]+}}, [[OFFSET]], s[{{[0-9]+}}:{{[0-9]+}}], s{{[0-9]+}} offen{{$}}
+
+define void @legal_offset_fi_offset(i32 addrspace(1)* %out, i32 %cond, i32 addrspace(1)* %offsets, i32 %if_offset, i32 %else_offset) {
+entry:
+  %scratch0 = alloca [8192 x i32]
+  %scratch1 = alloca [8192 x i32]
+
+  %offset0 = load i32 addrspace(1)* %offsets
+  %scratchptr0 = getelementptr [8192 x i32]* %scratch0, i32 0, i32 %offset0
+  store i32 %offset0, i32* %scratchptr0
+
+  %offsetptr1 = getelementptr i32 addrspace(1)* %offsets, i32 1
+  %offset1 = load i32 addrspace(1)* %offsetptr1
+  %scratchptr1 = getelementptr [8192 x i32]* %scratch1, i32 0, i32 %offset1
+  store i32 %offset1, i32* %scratchptr1
+
+  %cmp = icmp eq i32 %cond, 0
+  br i1 %cmp, label %if, label %else
+
+if:
+  %if_ptr = getelementptr [8192 x i32]* %scratch0, i32 0, i32 %if_offset
+  %if_value = load i32* %if_ptr
+  br label %done
+
+else:
+  %else_ptr = getelementptr [8192 x i32]* %scratch1, i32 0, i32 %else_offset
+  %else_value = load i32* %else_ptr
+  br label %done
+
+done:
+  %value = phi i32 [%if_value, %if], [%else_value, %else]
+  store i32 %value, i32 addrspace(1)* %out
+  ret void
+}
+