llvm-6502/test/CodeGen/R600/local-memory.ll
Rafael Espindola 6fd1b8ee48 Allow aliases to be unnamed_addr.
Alias with unnamed_addr were in a strange state. It is stored in GlobalValue,
the language reference talks about "unnamed_addr aliases" but the verifier
was rejecting them.

It seems natural to allow unnamed_addr in aliases:

* It is a property of how it is accessed, not of the data itself.
* It is perfectly possible to write code that depends on the address
of an alias.

This patch then makes unname_addr legal for aliases. One side effect is that
the syntax changes for a corner case: In globals, unnamed_addr is now printed
before the address space.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210302 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 01:20:28 +00:00

51 lines
1.7 KiB
LLVM

; RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck --check-prefix=EG-CHECK %s
; RUN: llc < %s -march=r600 -mcpu=verde -verify-machineinstrs | FileCheck --check-prefix=SI-CHECK %s
; RUN: llc < %s -march=r600 -mcpu=bonaire -verify-machineinstrs | FileCheck --check-prefix=CI-CHECK %s
@local_memory.local_mem = internal unnamed_addr addrspace(3) global [128 x i32] zeroinitializer, align 4
; EG-CHECK-LABEL: @local_memory
; SI-CHECK-LABEL: @local_memory
; CI-CHECK-LABEL: @local_memory
; Check that the LDS size emitted correctly
; EG-CHECK: .long 166120
; EG-CHECK-NEXT: .long 128
; SI-CHECK: .long 47180
; SI-CHECK-NEXT: .long 65536
; CI-CHECK: .long 47180
; CI-CHECK-NEXT: .long 32768
; EG-CHECK: LDS_WRITE
; SI-CHECK-NOT: S_WQM_B64
; SI-CHECK: DS_WRITE_B32
; GROUP_BARRIER must be the last instruction in a clause
; EG-CHECK: GROUP_BARRIER
; EG-CHECK-NEXT: ALU clause
; SI-CHECK: S_BARRIER
; EG-CHECK: LDS_READ_RET
; SI-CHECK: DS_READ_B32 {{v[0-9]+}},
define void @local_memory(i32 addrspace(1)* %out) {
entry:
%y.i = call i32 @llvm.r600.read.tidig.x() #0
%arrayidx = getelementptr inbounds [128 x i32] addrspace(3)* @local_memory.local_mem, i32 0, i32 %y.i
store i32 %y.i, i32 addrspace(3)* %arrayidx, align 4
%add = add nsw i32 %y.i, 1
%cmp = icmp eq i32 %add, 16
%.add = select i1 %cmp, i32 0, i32 %add
call void @llvm.AMDGPU.barrier.local()
%arrayidx1 = getelementptr inbounds [128 x i32] addrspace(3)* @local_memory.local_mem, i32 0, i32 %.add
%0 = load i32 addrspace(3)* %arrayidx1, align 4
%arrayidx2 = getelementptr inbounds i32 addrspace(1)* %out, i32 %y.i
store i32 %0, i32 addrspace(1)* %arrayidx2, align 4
ret void
}
declare i32 @llvm.r600.read.tidig.x() #0
declare void @llvm.AMDGPU.barrier.local()
attributes #0 = { readnone }