test/CodeGen/AMDGPU/ptradd-sdag-optimizations.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx942 -disable-separate-const-offset-from-gep=1 -amdgpu-use-sdag-ptradd=1 < %s | FileCheck --check-prefixes=GFX942,GFX942_PTRADD %s
; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx942 -disable-separate-const-offset-from-gep=1 -amdgpu-use-sdag-ptradd=0 < %s | FileCheck --check-prefixes=GFX942,GFX942_LEGACY %s

; Tests for DAG combines and folds related to the ISD::PTRADD SelectionDAG
; opcode. The RUN lines uses -disable-separate-const-offset-from-gep to disable
; similar transformations in that pass.

; Tests reassociation (ptradd N0:(ptradd p, c1), z) where N0 has only one use.
define i64 @global_load_ZTwoUses(ptr addrspace(1) %base, i64 %voffset) {
; GFX942-LABEL: global_load_ZTwoUses:
; GFX942:       ; %bb.0:
; GFX942-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX942-NEXT:    v_lshl_add_u64 v[0:1], v[0:1], 0, v[2:3]
; GFX942-NEXT:    global_load_dwordx2 v[0:1], v[0:1], off offset:24
; GFX942-NEXT:    s_waitcnt vmcnt(0)
; GFX942-NEXT:    v_lshl_add_u64 v[0:1], v[0:1], 0, v[2:3]
; GFX942-NEXT:    s_setpc_b64 s[30:31]
  %gep0 = getelementptr inbounds i8, ptr addrspace(1) %base, i64 24
  %gep1 = getelementptr inbounds i8, ptr addrspace(1) %gep0, i64 %voffset
  %l = load i64, ptr addrspace(1) %gep1, align 8
  %r = add i64 %l, %voffset
  ret i64 %r
}

define i64 @global_load_gep_add_reassoc(ptr addrspace(1) %base, i64 %voffset) {
; GFX942_PTRADD-LABEL: global_load_gep_add_reassoc:
; GFX942_PTRADD:       ; %bb.0:
; GFX942_PTRADD-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX942_PTRADD-NEXT:    v_lshl_add_u64 v[0:1], v[0:1], 0, v[2:3]
; GFX942_PTRADD-NEXT:    global_load_dwordx2 v[0:1], v[0:1], off offset:24
; GFX942_PTRADD-NEXT:    s_waitcnt vmcnt(0)
; GFX942_PTRADD-NEXT:    s_setpc_b64 s[30:31]
;
; GFX942_LEGACY-LABEL: global_load_gep_add_reassoc:
; GFX942_LEGACY:       ; %bb.0:
; GFX942_LEGACY-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX942_LEGACY-NEXT:    v_lshl_add_u64 v[0:1], v[2:3], 0, v[0:1]
; GFX942_LEGACY-NEXT:    global_load_dwordx2 v[0:1], v[0:1], off offset:24
; GFX942_LEGACY-NEXT:    s_waitcnt vmcnt(0)
; GFX942_LEGACY-NEXT:    s_setpc_b64 s[30:31]
  %add0 = add nuw nsw i64 %voffset, 24
  %gep0 = getelementptr nuw inbounds i8, ptr addrspace(1) %base, i64 %add0
  %l = load i64, ptr addrspace(1) %gep0, align 8
  ret i64 %l
}

; Tests reassociation (ptradd (ptradd p, c1), c2) with two constants. These
; would be folded away in most cases, but the index computation introduced by
; the legalization of wide vector stores can for example introduce them.
define amdgpu_kernel void @store_v16i32(ptr addrspace(1) %out, <16 x i32> %a) {
; GFX942-LABEL: store_v16i32:
; GFX942:       ; %bb.0: ; %entry
; GFX942-NEXT:    s_load_dwordx16 s[8:23], s[4:5], 0x40
; GFX942-NEXT:    s_load_dwordx2 s[0:1], s[4:5], 0x0
; GFX942-NEXT:    v_mov_b32_e32 v4, 0
; GFX942-NEXT:    s_waitcnt lgkmcnt(0)
; GFX942-NEXT:    v_mov_b32_e32 v0, s20
; GFX942-NEXT:    v_mov_b32_e32 v1, s21
; GFX942-NEXT:    v_mov_b32_e32 v2, s22
; GFX942-NEXT:    v_mov_b32_e32 v3, s23
; GFX942-NEXT:    global_store_dwordx4 v4, v[0:3], s[0:1] offset:48
; GFX942-NEXT:    s_nop 1
; GFX942-NEXT:    v_mov_b32_e32 v0, s16
; GFX942-NEXT:    v_mov_b32_e32 v1, s17
; GFX942-NEXT:    v_mov_b32_e32 v2, s18
; GFX942-NEXT:    v_mov_b32_e32 v3, s19
; GFX942-NEXT:    global_store_dwordx4 v4, v[0:3], s[0:1] offset:32
; GFX942-NEXT:    s_nop 1
; GFX942-NEXT:    v_mov_b32_e32 v0, s12
; GFX942-NEXT:    v_mov_b32_e32 v1, s13
; GFX942-NEXT:    v_mov_b32_e32 v2, s14
; GFX942-NEXT:    v_mov_b32_e32 v3, s15
; GFX942-NEXT:    global_store_dwordx4 v4, v[0:3], s[0:1] offset:16
; GFX942-NEXT:    s_nop 1
; GFX942-NEXT:    v_mov_b32_e32 v0, s8
; GFX942-NEXT:    v_mov_b32_e32 v1, s9
; GFX942-NEXT:    v_mov_b32_e32 v2, s10
; GFX942-NEXT:    v_mov_b32_e32 v3, s11
; GFX942-NEXT:    global_store_dwordx4 v4, v[0:3], s[0:1]
; GFX942-NEXT:    s_endpgm
entry:
  store <16 x i32> %a, ptr addrspace(1) %out
  ret void
}


; Tests the (ptradd 0, x) -> x DAG combine.
define void @baseptr_null(i64 %offset, i8 %v) {
; GFX942-LABEL: baseptr_null:
; GFX942:       ; %bb.0:
; GFX942-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX942-NEXT:    flat_store_byte v[0:1], v2
; GFX942-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
; GFX942-NEXT:    s_setpc_b64 s[30:31]
  %gep = getelementptr i8, ptr null, i64 %offset
  store i8 %v, ptr %gep, align 1
  ret void
}

; Taken from implicit-kernarg-backend-usage.ll, tests the PTRADD handling in the
; assertalign DAG combine.
define amdgpu_kernel void @llvm_amdgcn_queue_ptr(ptr addrspace(1) %ptr)  #0 {
; GFX942-LABEL: llvm_amdgcn_queue_ptr:
; GFX942:       ; %bb.0:
; GFX942-NEXT:    v_mov_b32_e32 v2, 0
; GFX942-NEXT:    global_load_ubyte v0, v2, s[2:3] sc0 sc1
; GFX942-NEXT:    global_load_ubyte v0, v2, s[4:5] offset:8 sc0 sc1
; GFX942-NEXT:    global_load_ubyte v0, v2, s[0:1] sc0 sc1
; GFX942-NEXT:    ; kill: killed $sgpr0_sgpr1
; GFX942-NEXT:    s_load_dwordx2 s[0:1], s[4:5], 0x0
; GFX942-NEXT:    s_waitcnt vmcnt(0)
; GFX942-NEXT:    v_mov_b64_e32 v[0:1], s[6:7]
; GFX942-NEXT:    ; kill: killed $sgpr2_sgpr3
; GFX942-NEXT:    s_waitcnt lgkmcnt(0)
; GFX942-NEXT:    global_store_dwordx2 v2, v[0:1], s[0:1] sc0 sc1
; GFX942-NEXT:    s_waitcnt vmcnt(0)
; GFX942-NEXT:    s_endpgm
  %queue.ptr = call ptr addrspace(4) @llvm.amdgcn.queue.ptr()
  %implicitarg.ptr = call ptr addrspace(4) @llvm.amdgcn.implicitarg.ptr()
  %dispatch.ptr = call ptr addrspace(4) @llvm.amdgcn.dispatch.ptr()
  %dispatch.id = call i64 @llvm.amdgcn.dispatch.id()
  %queue.load = load volatile i8, ptr addrspace(4) %queue.ptr
  %implicitarg.load = load volatile i8, ptr addrspace(4) %implicitarg.ptr
  %dispatch.load = load volatile i8, ptr addrspace(4) %dispatch.ptr
  store volatile i64 %dispatch.id, ptr addrspace(1) %ptr
  ret void
}

; Taken from memcpy-param-combinations.ll, tests PTRADD handling in
; SelectionDAGAddressAnalysis.
define void @memcpy_p1_p4_sz16_align_1_1(ptr addrspace(1) align 1 %dst, ptr addrspace(4) align 1 readonly %src) {
; GFX942-LABEL: memcpy_p1_p4_sz16_align_1_1:
; GFX942:       ; %bb.0: ; %entry
; GFX942-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX942-NEXT:    global_load_dwordx4 v[2:5], v[2:3], off
; GFX942-NEXT:    s_waitcnt vmcnt(0)
; GFX942-NEXT:    global_store_dwordx4 v[0:1], v[2:5], off
; GFX942-NEXT:    s_waitcnt vmcnt(0)
; GFX942-NEXT:    s_setpc_b64 s[30:31]
entry:
  tail call void @llvm.memcpy.p1.p4.i64(ptr addrspace(1) noundef nonnull align 1 %dst, ptr addrspace(4) noundef nonnull align 1 %src, i64 16, i1 false)
  ret void
}

; Test skipping the lower-32-bit addition if it is unnecessary.
define ptr @huge_offset_low_32_unused(ptr %p) {
; GFX942_PTRADD-LABEL: huge_offset_low_32_unused:
; GFX942_PTRADD:       ; %bb.0:
; GFX942_PTRADD-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX942_PTRADD-NEXT:    s_mov_b32 s0, 0
; GFX942_PTRADD-NEXT:    s_mov_b32 s1, 1
; GFX942_PTRADD-NEXT:    v_lshl_add_u64 v[0:1], v[0:1], 0, s[0:1]
; GFX942_PTRADD-NEXT:    s_setpc_b64 s[30:31]
;
; GFX942_LEGACY-LABEL: huge_offset_low_32_unused:
; GFX942_LEGACY:       ; %bb.0:
; GFX942_LEGACY-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX942_LEGACY-NEXT:    v_add_u32_e32 v1, 1, v1
; GFX942_LEGACY-NEXT:    s_setpc_b64 s[30:31]
  %gep = getelementptr inbounds i8, ptr %p, i64 u0x100000000
  ret ptr %gep
}

; Reassociate address computation if it leads to more scalar operations.
define amdgpu_kernel void @reassoc_scalar_r(ptr addrspace(1) %out, ptr addrspace(1) %p, i64 %soffset) {
; GFX942_PTRADD-LABEL: reassoc_scalar_r:
; GFX942_PTRADD:       ; %bb.0: ; %entry
; GFX942_PTRADD-NEXT:    s_load_dwordx2 s[6:7], s[4:5], 0x10
; GFX942_PTRADD-NEXT:    s_load_dwordx4 s[0:3], s[4:5], 0x0
; GFX942_PTRADD-NEXT:    v_mov_b32_e32 v1, 0
; GFX942_PTRADD-NEXT:    v_and_b32_e32 v0, 0x3ff, v0
; GFX942_PTRADD-NEXT:    s_waitcnt lgkmcnt(0)
; GFX942_PTRADD-NEXT:    v_lshl_add_u64 v[2:3], v[0:1], 0, s[6:7]
; GFX942_PTRADD-NEXT:    v_lshl_add_u64 v[2:3], s[2:3], 0, v[2:3]
; GFX942_PTRADD-NEXT:    global_store_dwordx2 v1, v[2:3], s[0:1]
; GFX942_PTRADD-NEXT:    s_endpgm
;
; GFX942_LEGACY-LABEL: reassoc_scalar_r:
; GFX942_LEGACY:       ; %bb.0: ; %entry
; GFX942_LEGACY-NEXT:    s_load_dwordx4 s[0:3], s[4:5], 0x0
; GFX942_LEGACY-NEXT:    s_load_dwordx2 s[6:7], s[4:5], 0x10
; GFX942_LEGACY-NEXT:    v_mov_b32_e32 v1, 0
; GFX942_LEGACY-NEXT:    v_and_b32_e32 v0, 0x3ff, v0
; GFX942_LEGACY-NEXT:    s_waitcnt lgkmcnt(0)
; GFX942_LEGACY-NEXT:    s_add_u32 s2, s2, s6
; GFX942_LEGACY-NEXT:    s_addc_u32 s3, s3, s7
; GFX942_LEGACY-NEXT:    v_lshl_add_u64 v[2:3], s[2:3], 0, v[0:1]
; GFX942_LEGACY-NEXT:    global_store_dwordx2 v1, v[2:3], s[0:1]
; GFX942_LEGACY-NEXT:    s_endpgm
entry:
  %voffset32 = call i32 @llvm.amdgcn.workitem.id.x()
  %voffset = zext i32 %voffset32 to i64
  %offset = add nuw nsw i64 %voffset, %soffset
  %gep = getelementptr i8, ptr addrspace(1) %p, i64 %offset
  store ptr addrspace(1) %gep, ptr addrspace(1) %out
  ret void
}

define amdgpu_kernel void @reassoc_scalar_l(ptr addrspace(1) %out, ptr addrspace(1) %p, i64 %soffset) {
; GFX942_PTRADD-LABEL: reassoc_scalar_l:
; GFX942_PTRADD:       ; %bb.0: ; %entry
; GFX942_PTRADD-NEXT:    s_load_dwordx2 s[6:7], s[4:5], 0x10
; GFX942_PTRADD-NEXT:    s_load_dwordx4 s[0:3], s[4:5], 0x0
; GFX942_PTRADD-NEXT:    v_mov_b32_e32 v1, 0
; GFX942_PTRADD-NEXT:    v_and_b32_e32 v0, 0x3ff, v0
; GFX942_PTRADD-NEXT:    s_waitcnt lgkmcnt(0)
; GFX942_PTRADD-NEXT:    v_lshl_add_u64 v[2:3], s[6:7], 0, v[0:1]
; GFX942_PTRADD-NEXT:    v_lshl_add_u64 v[2:3], s[2:3], 0, v[2:3]
; GFX942_PTRADD-NEXT:    global_store_dwordx2 v1, v[2:3], s[0:1]
; GFX942_PTRADD-NEXT:    s_endpgm
;
; GFX942_LEGACY-LABEL: reassoc_scalar_l:
; GFX942_LEGACY:       ; %bb.0: ; %entry
; GFX942_LEGACY-NEXT:    s_load_dwordx4 s[0:3], s[4:5], 0x0
; GFX942_LEGACY-NEXT:    s_load_dwordx2 s[6:7], s[4:5], 0x10
; GFX942_LEGACY-NEXT:    v_mov_b32_e32 v1, 0
; GFX942_LEGACY-NEXT:    v_and_b32_e32 v0, 0x3ff, v0
; GFX942_LEGACY-NEXT:    s_waitcnt lgkmcnt(0)
; GFX942_LEGACY-NEXT:    s_add_u32 s2, s2, s6
; GFX942_LEGACY-NEXT:    s_addc_u32 s3, s3, s7
; GFX942_LEGACY-NEXT:    v_lshl_add_u64 v[2:3], s[2:3], 0, v[0:1]
; GFX942_LEGACY-NEXT:    global_store_dwordx2 v1, v[2:3], s[0:1]
; GFX942_LEGACY-NEXT:    s_endpgm
entry:
  %voffset32 = call i32 @llvm.amdgcn.workitem.id.x()
  %voffset = zext i32 %voffset32 to i64
  %offset = add nuw nsw i64 %soffset, %voffset
  %gep = getelementptr i8, ptr addrspace(1) %p, i64 %offset
  store ptr addrspace(1) %gep, ptr addrspace(1) %out
  ret void
}

; Tests the target-specific (ptradd x, shl(0 - y, k)) -> sub(x, shl(y, k)) fold
define ptr addrspace(1) @shl_neg_offset(ptr addrspace(1) %p, i64 %noffset, i64 %shift) {
; GFX942_PTRADD-LABEL: shl_neg_offset:
; GFX942_PTRADD:       ; %bb.0:
; GFX942_PTRADD-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX942_PTRADD-NEXT:    v_sub_co_u32_e32 v2, vcc, 0, v2
; GFX942_PTRADD-NEXT:    s_nop 1
; GFX942_PTRADD-NEXT:    v_subb_co_u32_e32 v3, vcc, 0, v3, vcc
; GFX942_PTRADD-NEXT:    v_lshlrev_b64 v[2:3], v4, v[2:3]
; GFX942_PTRADD-NEXT:    v_lshl_add_u64 v[0:1], v[0:1], 0, v[2:3]
; GFX942_PTRADD-NEXT:    s_setpc_b64 s[30:31]
;
; GFX942_LEGACY-LABEL: shl_neg_offset:
; GFX942_LEGACY:       ; %bb.0:
; GFX942_LEGACY-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX942_LEGACY-NEXT:    v_lshlrev_b64 v[2:3], v4, v[2:3]
; GFX942_LEGACY-NEXT:    v_sub_co_u32_e32 v0, vcc, v0, v2
; GFX942_LEGACY-NEXT:    s_nop 1
; GFX942_LEGACY-NEXT:    v_subb_co_u32_e32 v1, vcc, v1, v3, vcc
; GFX942_LEGACY-NEXT:    s_setpc_b64 s[30:31]
  %offset = sub i64 0, %noffset
  %x = shl i64 %offset, %shift
  %gep = getelementptr inbounds i8, ptr addrspace(1) %p, i64 %x
  ret ptr addrspace(1) %gep
}

%complextype = type { i64, [10 x i8], float }

@v0 = dso_local addrspace(1) global %complextype zeroinitializer

; Check that offsets are folded into global addresses if possible. For example,
; this is relevant when using --amdgpu-lower-module-lds-strategy=table.
define ptr addrspace(1) @complextype_global_gep(i64 %offset) {
; GFX942_PTRADD-LABEL: complextype_global_gep:
; GFX942_PTRADD:       ; %bb.0:
; GFX942_PTRADD-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX942_PTRADD-NEXT:    s_getpc_b64 s[0:1]
; GFX942_PTRADD-NEXT:    s_add_u32 s0, s0, v0@rel32@lo+4
; GFX942_PTRADD-NEXT:    s_addc_u32 s1, s1, v0@rel32@hi+12
; GFX942_PTRADD-NEXT:    v_lshl_add_u64 v[0:1], s[0:1], 0, v[0:1]
; GFX942_PTRADD-NEXT:    v_lshl_add_u64 v[0:1], v[0:1], 0, 10
; GFX942_PTRADD-NEXT:    s_setpc_b64 s[30:31]
;
; GFX942_LEGACY-LABEL: complextype_global_gep:
; GFX942_LEGACY:       ; %bb.0:
; GFX942_LEGACY-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX942_LEGACY-NEXT:    s_getpc_b64 s[0:1]
; GFX942_LEGACY-NEXT:    s_add_u32 s0, s0, v0@rel32@lo+14
; GFX942_LEGACY-NEXT:    s_addc_u32 s1, s1, v0@rel32@hi+22
; GFX942_LEGACY-NEXT:    v_lshl_add_u64 v[0:1], v[0:1], 0, s[0:1]
; GFX942_LEGACY-NEXT:    s_setpc_b64 s[30:31]
  %gep0 = getelementptr inbounds %complextype, ptr addrspace(1) @v0, i64 0, i32 1, i64 %offset
  %gep1 = getelementptr inbounds i8, ptr addrspace(1) %gep0, i64 2
  ret ptr addrspace(1) %gep1
}

%S = type <{ float, double }>

; Tests the tryFoldToMad64_32 PTRADD combine.
define amdgpu_kernel void @fold_mad64(ptr addrspace(1) %p) {
; GFX942_PTRADD-LABEL: fold_mad64:
; GFX942_PTRADD:       ; %bb.0:
; GFX942_PTRADD-NEXT:    s_load_dwordx2 s[0:1], s[4:5], 0x0
; GFX942_PTRADD-NEXT:    v_and_b32_e32 v0, 0x3ff, v0
; GFX942_PTRADD-NEXT:    v_mul_hi_u32_u24_e32 v1, 12, v0
; GFX942_PTRADD-NEXT:    v_mul_u32_u24_e32 v0, 12, v0
; GFX942_PTRADD-NEXT:    v_mov_b32_e32 v2, 1.0
; GFX942_PTRADD-NEXT:    s_waitcnt lgkmcnt(0)
; GFX942_PTRADD-NEXT:    v_lshl_add_u64 v[0:1], s[0:1], 0, v[0:1]
; GFX942_PTRADD-NEXT:    global_store_dword v[0:1], v2, off
; GFX942_PTRADD-NEXT:    s_endpgm
;
; GFX942_LEGACY-LABEL: fold_mad64:
; GFX942_LEGACY:       ; %bb.0:
; GFX942_LEGACY-NEXT:    s_load_dwordx2 s[0:1], s[4:5], 0x0
; GFX942_LEGACY-NEXT:    v_and_b32_e32 v0, 0x3ff, v0
; GFX942_LEGACY-NEXT:    v_mov_b32_e32 v2, 1.0
; GFX942_LEGACY-NEXT:    s_waitcnt lgkmcnt(0)
; GFX942_LEGACY-NEXT:    v_mad_u64_u32 v[0:1], s[0:1], v0, 12, s[0:1]
; GFX942_LEGACY-NEXT:    global_store_dword v[0:1], v2, off
; GFX942_LEGACY-NEXT:    s_endpgm
  %voffset32 = call i32 @llvm.amdgcn.workitem.id.x()
  %voffset = zext i32 %voffset32 to i64
  %p1 = getelementptr inbounds %S, ptr addrspace(1) %p, i64 %voffset, i32 0
  store float 1.0, ptr addrspace(1) %p1
  ret void
}