llvm-6502/test/CodeGen/R600/salu-to-valu.ll

; RUN: llc < %s -march=r600 -mcpu=SI -verify-machineinstrs | FileCheck %s

; In this test both the pointer and the offset operands to the
; BUFFER_LOAD instructions end up being stored in vgprs.  This
; requires us to add the pointer and offset together, store the
; result in the offset operand (vaddr), and then store 0 in an
; sgpr register pair and use that for the pointer operand
; (low 64-bits of srsrc).

; CHECK-LABEL: @mubuf

; Make sure we aren't using VGPRs for the source operand of S_MOV_B64
; CHECK-NOT: S_MOV_B64 s[{{[0-9]+:[0-9]+}}], v

; Make sure we aren't using VGPR's for the srsrc operand of BUFFER_LOAD_*
; instructions
; CHECK: BUFFER_LOAD_UBYTE v{{[0-9]+}}, s[{{[0-9]+:[0-9]+}}]
; CHECK: BUFFER_LOAD_UBYTE v{{[0-9]+}}, s[{{[0-9]+:[0-9]+}}]
define void @mubuf(i32 addrspace(1)* %out, i8 addrspace(1)* %in) {
entry:
  %0 = call i32 @llvm.r600.read.tidig.x() #1
  %1 = call i32 @llvm.r600.read.tidig.y() #1
  %2 = sext i32 %0 to i64
  %3 = sext i32 %1 to i64
  br label %loop

loop:
  %4 = phi i64 [0, %entry], [%5, %loop]
  %5 = add i64 %2, %4
  %6 = getelementptr i8 addrspace(1)* %in, i64 %5
  %7 = load i8 addrspace(1)* %6, align 1
  %8 = or i64 %5, 1
  %9 = getelementptr i8 addrspace(1)* %in, i64 %8
  %10 = load i8 addrspace(1)* %9, align 1
  %11 = add i8 %7, %10
  %12 = sext i8 %11 to i32
  store i32 %12, i32 addrspace(1)* %out
  %13 = icmp slt i64 %5, 10
  br i1 %13, label %loop, label %done

done:
  ret void
}

declare i32 @llvm.r600.read.tidig.x() #1
declare i32 @llvm.r600.read.tidig.y() #1

attributes #1 = { nounwind readnone }

; Test moving an SMRD instruction to the VALU

; CHECK-LABEL: @smrd_valu
; CHECK: BUFFER_LOAD_DWORD [[OUT:v[0-9]+]]
; CHECK: BUFFER_STORE_DWORD [[OUT]]

define void @smrd_valu(i32 addrspace(2)* addrspace(1)* %in, i32 %a, i32 addrspace(1)* %out) {
entry:
  %0 = icmp ne i32 %a, 0
  br i1 %0, label %if, label %else

if:
  %1 = load i32 addrspace(2)* addrspace(1)* %in
  br label %endif

else:
  %2 = getelementptr i32 addrspace(2)* addrspace(1)* %in
  %3 = load i32 addrspace(2)* addrspace(1)* %2
  br label %endif

endif:
  %4 = phi i32 addrspace(2)*  [%1, %if], [%3, %else]
  %5 = getelementptr i32 addrspace(2)* %4, i32 3000
  %6 = load i32 addrspace(2)* %5
  store i32 %6, i32 addrspace(1)* %out
  ret void
}

; Test moving ann SMRD with an immediate offset to the VALU

; CHECK-LABEL: @smrd_valu2
; CHECK: BUFFER_LOAD_DWORD
define void @smrd_valu2(i32 addrspace(1)* %out, [8 x i32] addrspace(2)* %in) {
entry:
  %0 = call i32 @llvm.r600.read.tidig.x() nounwind readnone
  %1 = add i32 %0, 4
  %2 = getelementptr [8 x i32] addrspace(2)* %in, i32 %0, i32 4
  %3 = load i32 addrspace(2)* %2
  store i32 %3, i32 addrspace(1)* %out
  ret void
}