Files
archived-llvm/test/CodeGen/AMDGPU/gv-offset-folding.ll
Matt Arsenault d019e8638a Enable FeatureFlatForGlobal on Volcanic Islands
This switches to the workaround that HSA defaults to
for the mesa path.

This should be applied to the 4.0 branch.

Patch by Vedran Miletić <vedran@miletic.net>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292982 91177308-0d34-0410-b5e6-96231b3b80d8
2017-01-24 22:02:15 +00:00

22 lines
852 B
LLVM

; RUN: llc -mtriple=amdgcn--amdhsa -mcpu=fiji -mattr=-flat-for-global -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
}