From fd155828ed1f0ba4120a6030d8f23052ae65ab7a Mon Sep 17 00:00:00 2001
From: Tom Stellard <thomas.stellard@amd.com>
Date: Mon, 26 Aug 2013 15:05:36 +0000
Subject: SelectionDAG: Use correct pointer size when lowering function
 arguments v2

This adds minimal support to the SelectionDAG for handling address spaces
with different pointer sizes.  The SelectionDAG should now correctly
lower pointer function arguments to the correct size as well as generate
the correct code when lowering getelementptr.

This patch also updates the R600 DataLayout to use 32-bit pointers for
the local address space.

v2:
  - Add more helper functions to TargetLoweringBase
  - Use CHECK-LABEL for tests

llvm-svn: 189221
---
 .../CodeGen/R600/32-bit-local-address-space.ll     | 42 ++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 llvm/test/CodeGen/R600/32-bit-local-address-space.ll

(limited to 'llvm/test/CodeGen')

diff --git a/llvm/test/CodeGen/R600/32-bit-local-address-space.ll b/llvm/test/CodeGen/R600/32-bit-local-address-space.ll
new file mode 100644
index 00000000000..d19a82eede5
--- /dev/null
+++ b/llvm/test/CodeGen/R600/32-bit-local-address-space.ll
@@ -0,0 +1,42 @@
+; RUN: llc < %s -march=r600 -mcpu=verde | FileCheck %s
+
+; On Southern Islands GPUs the local address space(3) uses 32-bit pointers and
+; the global address space(1) uses 64-bit pointers.  These tests check to make sure
+; the correct pointer size is used for the local address space.
+
+; The e{{32|64}} suffix on the instructions refers to the encoding size and not
+; the size of the operands.  The operand size is denoted in the instruction name.
+; Instructions with B32, U32, and I32 in their name take 32-bit operands, while
+; instructions with B64, U64, and I64 take 64-bit operands.
+
+; CHECK-LABEL: @local_address_load
+; CHECK: V_MOV_B32_e{{32|64}} [[PTR:VGPR[0-9]]]
+; CHECK: DS_READ_B32 [[PTR]]
+define void @local_address_load(i32 addrspace(1)* %out, i32 addrspace(3)* %in) {
+entry:
+  %0 = load i32 addrspace(3)* %in
+  store i32 %0, i32 addrspace(1)* %out
+  ret void
+}
+
+; CHECK-LABEL: @local_address_gep
+; CHECK: V_ADD_I32_e{{32|64}} [[PTR:VGPR[0-9]]]
+; CHECK: DS_READ_B32 [[PTR]]
+define void @local_address_gep(i32 addrspace(1)* %out, i32 addrspace(3)* %in, i32 %offset) {
+entry:
+  %0 = getelementptr i32 addrspace(3)* %in, i32 %offset
+  %1 = load i32 addrspace(3)* %0
+  store i32 %1, i32 addrspace(1)* %out
+  ret void
+}
+
+; CHECK-LABEL: @local_address_gep_const_offset
+; CHECK: V_ADD_I32_e{{32|64}} [[PTR:VGPR[0-9]]]
+; CHECK: DS_READ_B32 [[PTR]]
+define void @local_address_gep_const_offset(i32 addrspace(1)* %out, i32 addrspace(3)* %in) {
+entry:
+  %0 = getelementptr i32 addrspace(3)* %in, i32 1
+  %1 = load i32 addrspace(3)* %0
+  store i32 %1, i32 addrspace(1)* %out
+  ret void
+}
-- 
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