test/CodeGen/AMDGPU/lower-module-lds-single-var-unambiguous.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -mtriple=amdgcn-- -passes=amdgpu-lower-module-lds < %s --amdgpu-lower-module-lds-strategy=module | FileCheck -check-prefixes=CHECK,MODULE %s
; RUN: opt -S -mtriple=amdgcn-- -passes=amdgpu-lower-module-lds < %s --amdgpu-lower-module-lds-strategy=table | FileCheck -check-prefixes=CHECK,TABLE %s
; RUN: opt -S -mtriple=amdgcn-- -passes=amdgpu-lower-module-lds < %s --amdgpu-lower-module-lds-strategy=kernel | FileCheck -check-prefixes=CHECK,K_OR_HY %s
; RUN: opt -S -mtriple=amdgcn-- -passes=amdgpu-lower-module-lds < %s --amdgpu-lower-module-lds-strategy=hybrid | FileCheck -check-prefixes=CHECK,K_OR_HY %s

;; Same checks for kernel and for hybrid as an unambiguous reference to a variable - one where exactly one kernel
;; can reach it - is the case where hybrid lowering can always prefer the direct access.

;; Single kernel is sole user of single variable, all options codegen as direct access to kernel struct

@k0.lds = addrspace(3) global i8 undef
define amdgpu_kernel void @k0() {
; CHECK-LABEL: @k0(
; CHECK-NEXT:    [[LD:%.*]] = load i8, ptr addrspace(3) @llvm.amdgcn.kernel.k0.lds, align 1
; CHECK-NEXT:    [[MUL:%.*]] = mul i8 [[LD]], 2
; CHECK-NEXT:    store i8 [[MUL]], ptr addrspace(3) @llvm.amdgcn.kernel.k0.lds, align 1
; CHECK-NEXT:    ret void
;
  %ld = load i8, ptr addrspace(3) @k0.lds
  %mul = mul i8 %ld, 2
  store i8 %mul, ptr  addrspace(3) @k0.lds
  ret void
}

;; Function is reachable from one kernel. Variable goes in module lds or the kernel struct, but never both.

@f0.lds = addrspace(3) global i16 undef
define void @f0() {
; MODULE-LABEL: @f0(
; MODULE-NEXT:    [[LD:%.*]] = load i16, ptr addrspace(3) getelementptr inbounds ([[LLVM_AMDGCN_MODULE_LDS_T:%.*]], ptr addrspace(3) @llvm.amdgcn.module.lds, i32 0, i32 1), align 4, !alias.scope !1, !noalias !4
; MODULE-NEXT:    [[MUL:%.*]] = mul i16 [[LD]], 3
; MODULE-NEXT:    store i16 [[MUL]], ptr addrspace(3) getelementptr inbounds ([[LLVM_AMDGCN_MODULE_LDS_T]], ptr addrspace(3) @llvm.amdgcn.module.lds, i32 0, i32 1), align 4, !alias.scope !1, !noalias !4
; MODULE-NEXT:    ret void
;
; TABLE-LABEL: @f0(
; TABLE-NEXT:    [[TMP1:%.*]] = call i32 @llvm.amdgcn.lds.kernel.id()
; TABLE-NEXT:    [[F0_LDS2:%.*]] = getelementptr inbounds [2 x [2 x i32]], ptr addrspace(4) @llvm.amdgcn.lds.offset.table, i32 0, i32 [[TMP1]], i32 1
; TABLE-NEXT:    [[TMP2:%.*]] = load i32, ptr addrspace(4) [[F0_LDS2]], align 4
; TABLE-NEXT:    [[F0_LDS3:%.*]] = inttoptr i32 [[TMP2]] to ptr addrspace(3)
; TABLE-NEXT:    [[LD:%.*]] = load i16, ptr addrspace(3) [[F0_LDS3]], align 2
; TABLE-NEXT:    [[MUL:%.*]] = mul i16 [[LD]], 3
; TABLE-NEXT:    [[F0_LDS:%.*]] = getelementptr inbounds [2 x [2 x i32]], ptr addrspace(4) @llvm.amdgcn.lds.offset.table, i32 0, i32 [[TMP1]], i32 1
; TABLE-NEXT:    [[TMP3:%.*]] = load i32, ptr addrspace(4) [[F0_LDS]], align 4
; TABLE-NEXT:    [[F0_LDS1:%.*]] = inttoptr i32 [[TMP3]] to ptr addrspace(3)
; TABLE-NEXT:    store i16 [[MUL]], ptr addrspace(3) [[F0_LDS1]], align 2
; TABLE-NEXT:    ret void
;
; K_OR_HY-LABEL: @f0(
; K_OR_HY-NEXT:    [[LD:%.*]] = load i16, ptr addrspace(3) @llvm.amdgcn.kernel.k_f0.lds, align 2
; K_OR_HY-NEXT:    [[MUL:%.*]] = mul i16 [[LD]], 3
; K_OR_HY-NEXT:    store i16 [[MUL]], ptr addrspace(3) @llvm.amdgcn.kernel.k_f0.lds, align 2
; K_OR_HY-NEXT:    ret void
;
  %ld = load i16, ptr addrspace(3) @f0.lds
  %mul = mul i16 %ld, 3
  store i16 %mul, ptr  addrspace(3) @f0.lds
  ret void
}

define amdgpu_kernel void @k_f0() {
; MODULE-LABEL: @k_f0(
; MODULE-NEXT:    call void @llvm.donothing() [ "ExplicitUse"(ptr addrspace(3) @llvm.amdgcn.module.lds) ], !alias.scope !5, !noalias !1
; MODULE-NEXT:    call void @f0()
; MODULE-NEXT:    ret void
;
; TABLE-LABEL: @k_f0(
; TABLE-NEXT:    call void @llvm.donothing() [ "ExplicitUse"(ptr addrspace(3) @llvm.amdgcn.kernel.k_f0.lds) ]
; TABLE-NEXT:    call void @f0()
; TABLE-NEXT:    ret void
;
; K_OR_HY-LABEL: @k_f0(
; K_OR_HY-NEXT:    call void @f0()
; K_OR_HY-NEXT:    ret void
;
  call void @f0()
  ret void
}

;; As above, but with the kernel also uing the variable.

@both.lds = addrspace(3) global i32 undef
define void @f_both() {
; MODULE-LABEL: @f_both(
; MODULE-NEXT:    [[LD:%.*]] = load i32, ptr addrspace(3) @llvm.amdgcn.module.lds, align 4, !alias.scope !5, !noalias !4
; MODULE-NEXT:    [[MUL:%.*]] = mul i32 [[LD]], 4
; MODULE-NEXT:    store i32 [[MUL]], ptr addrspace(3) @llvm.amdgcn.module.lds, align 4, !alias.scope !5, !noalias !4
; MODULE-NEXT:    ret void
;
; TABLE-LABEL: @f_both(
; TABLE-NEXT:    [[TMP1:%.*]] = call i32 @llvm.amdgcn.lds.kernel.id()
; TABLE-NEXT:    [[BOTH_LDS2:%.*]] = getelementptr inbounds [2 x [2 x i32]], ptr addrspace(4) @llvm.amdgcn.lds.offset.table, i32 0, i32 [[TMP1]], i32 0
; TABLE-NEXT:    [[TMP2:%.*]] = load i32, ptr addrspace(4) [[BOTH_LDS2]], align 4
; TABLE-NEXT:    [[BOTH_LDS3:%.*]] = inttoptr i32 [[TMP2]] to ptr addrspace(3)
; TABLE-NEXT:    [[LD:%.*]] = load i32, ptr addrspace(3) [[BOTH_LDS3]], align 4
; TABLE-NEXT:    [[MUL:%.*]] = mul i32 [[LD]], 4
; TABLE-NEXT:    [[BOTH_LDS:%.*]] = getelementptr inbounds [2 x [2 x i32]], ptr addrspace(4) @llvm.amdgcn.lds.offset.table, i32 0, i32 [[TMP1]], i32 0
; TABLE-NEXT:    [[TMP3:%.*]] = load i32, ptr addrspace(4) [[BOTH_LDS]], align 4
; TABLE-NEXT:    [[BOTH_LDS1:%.*]] = inttoptr i32 [[TMP3]] to ptr addrspace(3)
; TABLE-NEXT:    store i32 [[MUL]], ptr addrspace(3) [[BOTH_LDS1]], align 4
; TABLE-NEXT:    ret void
;
; K_OR_HY-LABEL: @f_both(
; K_OR_HY-NEXT:    [[LD:%.*]] = load i32, ptr addrspace(3) @llvm.amdgcn.kernel.k0_both.lds, align 4
; K_OR_HY-NEXT:    [[MUL:%.*]] = mul i32 [[LD]], 4
; K_OR_HY-NEXT:    store i32 [[MUL]], ptr addrspace(3) @llvm.amdgcn.kernel.k0_both.lds, align 4
; K_OR_HY-NEXT:    ret void
;
  %ld = load i32, ptr addrspace(3) @both.lds
  %mul = mul i32 %ld, 4
  store i32 %mul, ptr  addrspace(3) @both.lds
  ret void
}

define amdgpu_kernel void @k0_both() {
; MODULE-LABEL: @k0_both(
; MODULE-NEXT:    call void @llvm.donothing() [ "ExplicitUse"(ptr addrspace(3) @llvm.amdgcn.module.lds) ]
; MODULE-NEXT:    [[LD:%.*]] = load i32, ptr addrspace(3) @llvm.amdgcn.module.lds, align 4, !alias.scope !5, !noalias !1
; MODULE-NEXT:    [[MUL:%.*]] = mul i32 [[LD]], 5
; MODULE-NEXT:    store i32 [[MUL]], ptr addrspace(3) @llvm.amdgcn.module.lds, align 4, !alias.scope !5, !noalias !1
; MODULE-NEXT:    call void @f_both()
; MODULE-NEXT:    ret void
;
; TABLE-LABEL: @k0_both(
; TABLE-NEXT:    call void @llvm.donothing() [ "ExplicitUse"(ptr addrspace(3) @llvm.amdgcn.kernel.k0_both.lds) ]
; TABLE-NEXT:    [[LD:%.*]] = load i32, ptr addrspace(3) @llvm.amdgcn.kernel.k0_both.lds, align 4
; TABLE-NEXT:    [[MUL:%.*]] = mul i32 [[LD]], 5
; TABLE-NEXT:    store i32 [[MUL]], ptr addrspace(3) @llvm.amdgcn.kernel.k0_both.lds, align 4
; TABLE-NEXT:    call void @f_both()
; TABLE-NEXT:    ret void
;
; K_OR_HY-LABEL: @k0_both(
; K_OR_HY-NEXT:    [[LD:%.*]] = load i32, ptr addrspace(3) @llvm.amdgcn.kernel.k0_both.lds, align 4
; K_OR_HY-NEXT:    [[MUL:%.*]] = mul i32 [[LD]], 5
; K_OR_HY-NEXT:    store i32 [[MUL]], ptr addrspace(3) @llvm.amdgcn.kernel.k0_both.lds, align 4
; K_OR_HY-NEXT:    call void @f_both()
; K_OR_HY-NEXT:    ret void
;
  %ld = load i32, ptr addrspace(3) @both.lds
  %mul = mul i32 %ld, 5
  store i32 %mul, ptr  addrspace(3) @both.lds
  call void @f_both()
  ret void
}