diff options
Diffstat (limited to 'llvm/test/CodeGen/AMDGPU/gv-offset-folding.ll')
| -rw-r--r-- | llvm/test/CodeGen/AMDGPU/gv-offset-folding.ll | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/AMDGPU/gv-offset-folding.ll b/llvm/test/CodeGen/AMDGPU/gv-offset-folding.ll new file mode 100644 index 00000000000..c75fdb35dd0 --- /dev/null +++ b/llvm/test/CodeGen/AMDGPU/gv-offset-folding.ll @@ -0,0 +1,21 @@ +; RUN: llc -mtriple=amdgcn--amdhsa -mcpu=fiji -relocation-model=static < %s | FileCheck %s + +@lds = external addrspace(3) global [4 x i32] + +; Function Attrs: nounwind + +; Offset folding is an optimization done for global variables with relocations, +; which allows you to store the offset in the r_addend of the relocation entry. +; The offset is apllied to the variables address at link time, which eliminates +; the need to emit shader instructions to do this calculation. +; We don't use relocations for local memory, so we should never fold offsets +; for local memory globals. + +; CHECK-LABEL: lds_no_offset: +; CHECK ds_write_b32 v{{[0-9]+}}, v{{[0-9]+}} offset:4 +define void @lds_no_offset() { +entry: + %ptr = getelementptr [4 x i32], [4 x i32] addrspace(3)* @lds, i32 0, i32 1 + store i32 0, i32 addrspace(3)* %ptr + ret void +} |
