AMDGPU: Add test for 16 bit unsigned scratch offsets

Large scratch offset with one on highest bit selected as negative,
negative offset has same binary representation in 16 bits as large
unsigned offset.

Author: petar-avramovic

llvm/test/CodeGen/AMDGPU/GlobalISel/flat-scratch.ll

@@ -1510,4 +1510,115 @@ bb:
   ret void
 }
 
+
+define amdgpu_gs void @sgpr_base_large_offset(ptr addrspace(1) %out, ptr addrspace(5) inreg %scevgep) {
+; GFX9-LABEL: sgpr_base_large_offset:
+; GFX9:       ; %bb.0: ; %entry
+; GFX9-NEXT:    s_add_u32 flat_scratch_lo, s0, s5
+; GFX9-NEXT:    s_addc_u32 flat_scratch_hi, s1, 0
+; GFX9-NEXT:    s_add_u32 s0, s2, 0xffe8
+; GFX9-NEXT:    scratch_load_dword v2, off, s0
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-NEXT:    global_store_dword v[0:1], v2, off
+; GFX9-NEXT:    s_endpgm
+;
+; GFX10-LABEL: sgpr_base_large_offset:
+; GFX10:       ; %bb.0: ; %entry
+; GFX10-NEXT:    s_add_u32 s0, s0, s5
+; GFX10-NEXT:    s_addc_u32 s1, s1, 0
+; GFX10-NEXT:    s_setreg_b32 hwreg(HW_REG_FLAT_SCR_LO), s0
+; GFX10-NEXT:    s_setreg_b32 hwreg(HW_REG_FLAT_SCR_HI), s1
+; GFX10-NEXT:    s_add_u32 s0, s2, 0xffe8
+; GFX10-NEXT:    scratch_load_dword v2, off, s0
+; GFX10-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-NEXT:    global_store_dword v[0:1], v2, off
+; GFX10-NEXT:    s_endpgm
+;
+; GFX940-LABEL: sgpr_base_large_offset:
+; GFX940:       ; %bb.0: ; %entry
+; GFX940-NEXT:    s_add_u32 s0, s0, 0xffe8
+; GFX940-NEXT:    scratch_load_dword v2, off, s0
+; GFX940-NEXT:    s_waitcnt vmcnt(0)
+; GFX940-NEXT:    global_store_dword v[0:1], v2, off sc0 sc1
+; GFX940-NEXT:    s_endpgm
+;
+; GFX11-LABEL: sgpr_base_large_offset:
+; GFX11:       ; %bb.0: ; %entry
+; GFX11-NEXT:    s_add_u32 s0, s0, 0xffe8
+; GFX11-NEXT:    scratch_load_b32 v2, off, s0
+; GFX11-NEXT:    s_waitcnt vmcnt(0)
+; GFX11-NEXT:    global_store_b32 v[0:1], v2, off
+; GFX11-NEXT:    s_nop 0
+; GFX11-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX11-NEXT:    s_endpgm
+;
+; GFX12-LABEL: sgpr_base_large_offset:
+; GFX12:       ; %bb.0: ; %entry
+; GFX12-NEXT:    scratch_load_b32 v2, off, s0 offset:65512
+; GFX12-NEXT:    s_wait_loadcnt 0x0
+; GFX12-NEXT:    global_store_b32 v[0:1], v2, off
+; GFX12-NEXT:    s_nop 0
+; GFX12-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX12-NEXT:    s_endpgm
+entry:
+  %scevgep28 = getelementptr i8, ptr addrspace(5) %scevgep, i32 65512
+  %0 = load i32, ptr addrspace(5) %scevgep28, align 4
+  store i32 %0, ptr addrspace(1) %out
+  ret void
+}
+
+define amdgpu_gs void @sgpr_base_negative_offset(ptr addrspace(1) %out, ptr addrspace(5) inreg %scevgep) {
+; GFX9-LABEL: sgpr_base_negative_offset:
+; GFX9:       ; %bb.0: ; %entry
+; GFX9-NEXT:    s_add_u32 flat_scratch_lo, s0, s5
+; GFX9-NEXT:    s_addc_u32 flat_scratch_hi, s1, 0
+; GFX9-NEXT:    s_add_u32 s0, s2, 0xffffffe8
+; GFX9-NEXT:    scratch_load_dword v2, off, s0
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-NEXT:    global_store_dword v[0:1], v2, off
+; GFX9-NEXT:    s_endpgm
+;
+; GFX10-LABEL: sgpr_base_negative_offset:
+; GFX10:       ; %bb.0: ; %entry
+; GFX10-NEXT:    s_add_u32 s0, s0, s5
+; GFX10-NEXT:    s_addc_u32 s1, s1, 0
+; GFX10-NEXT:    s_setreg_b32 hwreg(HW_REG_FLAT_SCR_LO), s0
+; GFX10-NEXT:    s_setreg_b32 hwreg(HW_REG_FLAT_SCR_HI), s1
+; GFX10-NEXT:    scratch_load_dword v2, off, s2 offset:-24
+; GFX10-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-NEXT:    global_store_dword v[0:1], v2, off
+; GFX10-NEXT:    s_endpgm
+;
+; GFX940-LABEL: sgpr_base_negative_offset:
+; GFX940:       ; %bb.0: ; %entry
+; GFX940-NEXT:    s_add_u32 s0, s0, 0xffffffe8
+; GFX940-NEXT:    scratch_load_dword v2, off, s0
+; GFX940-NEXT:    s_waitcnt vmcnt(0)
+; GFX940-NEXT:    global_store_dword v[0:1], v2, off sc0 sc1
+; GFX940-NEXT:    s_endpgm
+;
+; GFX11-LABEL: sgpr_base_negative_offset:
+; GFX11:       ; %bb.0: ; %entry
+; GFX11-NEXT:    scratch_load_b32 v2, off, s0 offset:-24
+; GFX11-NEXT:    s_waitcnt vmcnt(0)
+; GFX11-NEXT:    global_store_b32 v[0:1], v2, off
+; GFX11-NEXT:    s_nop 0
+; GFX11-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX11-NEXT:    s_endpgm
+;
+; GFX12-LABEL: sgpr_base_negative_offset:
+; GFX12:       ; %bb.0: ; %entry
+; GFX12-NEXT:    scratch_load_b32 v2, off, s0 offset:-24
+; GFX12-NEXT:    s_wait_loadcnt 0x0
+; GFX12-NEXT:    global_store_b32 v[0:1], v2, off
+; GFX12-NEXT:    s_nop 0
+; GFX12-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX12-NEXT:    s_endpgm
+entry:
+  %scevgep28 = getelementptr i8, ptr addrspace(5) %scevgep, i32 -24
+  %0 = load i32, ptr addrspace(5) %scevgep28, align 4
+  store i32 %0, ptr addrspace(1) %out
+  ret void
+}
+
 declare i32 @llvm.amdgcn.workitem.id.x()

llvm/test/CodeGen/AMDGPU/flat-scratch.ll

@@ -4891,5 +4891,215 @@ bb:
   ret void
 }
 
+define amdgpu_gs void @sgpr_base_large_offset(ptr addrspace(1) %out, ptr addrspace(5) inreg %scevgep) {
+; GFX9-LABEL: sgpr_base_large_offset:
+; GFX9:       ; %bb.0: ; %entry
+; GFX9-NEXT:    s_add_u32 flat_scratch_lo, s0, s5
+; GFX9-NEXT:    s_addc_u32 flat_scratch_hi, s1, 0
+; GFX9-NEXT:    s_add_i32 s2, s2, 0xffe8
+; GFX9-NEXT:    scratch_load_dword v2, off, s2
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-NEXT:    global_store_dword v[0:1], v2, off
+; GFX9-NEXT:    s_endpgm
+;
+; GFX10-LABEL: sgpr_base_large_offset:
+; GFX10:       ; %bb.0: ; %entry
+; GFX10-NEXT:    s_add_u32 s0, s0, s5
+; GFX10-NEXT:    s_addc_u32 s1, s1, 0
+; GFX10-NEXT:    s_setreg_b32 hwreg(HW_REG_FLAT_SCR_LO), s0
+; GFX10-NEXT:    s_setreg_b32 hwreg(HW_REG_FLAT_SCR_HI), s1
+; GFX10-NEXT:    s_add_i32 s2, s2, 0xffe8
+; GFX10-NEXT:    scratch_load_dword v2, off, s2
+; GFX10-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-NEXT:    global_store_dword v[0:1], v2, off
+; GFX10-NEXT:    s_endpgm
+;
+; GFX11-LABEL: sgpr_base_large_offset:
+; GFX11:       ; %bb.0: ; %entry
+; GFX11-NEXT:    s_add_i32 s0, s0, 0xffe8
+; GFX11-NEXT:    scratch_load_b32 v2, off, s0
+; GFX11-NEXT:    s_waitcnt vmcnt(0)
+; GFX11-NEXT:    global_store_b32 v[0:1], v2, off
+; GFX11-NEXT:    s_nop 0
+; GFX11-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX11-NEXT:    s_endpgm
+;
+; GFX12-LABEL: sgpr_base_large_offset:
+; GFX12:       ; %bb.0: ; %entry
+; GFX12-NEXT:    scratch_load_b32 v2, off, s0 offset:-24
+; GFX12-NEXT:    s_wait_loadcnt 0x0
+; GFX12-NEXT:    global_store_b32 v[0:1], v2, off
+; GFX12-NEXT:    s_nop 0
+; GFX12-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX12-NEXT:    s_endpgm
+;
+; GFX9-PAL-LABEL: sgpr_base_large_offset:
+; GFX9-PAL:       ; %bb.0: ; %entry
+; GFX9-PAL-NEXT:    s_getpc_b64 s[2:3]
+; GFX9-PAL-NEXT:    s_mov_b32 s2, s8
+; GFX9-PAL-NEXT:    s_load_dwordx2 s[2:3], s[2:3], 0x0
+; GFX9-PAL-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX9-PAL-NEXT:    s_and_b32 s3, s3, 0xffff
+; GFX9-PAL-NEXT:    s_add_u32 flat_scratch_lo, s2, s5
+; GFX9-PAL-NEXT:    s_addc_u32 flat_scratch_hi, s3, 0
+; GFX9-PAL-NEXT:    s_add_i32 s0, s0, 0xffe8
+; GFX9-PAL-NEXT:    scratch_load_dword v2, off, s0
+; GFX9-PAL-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-PAL-NEXT:    global_store_dword v[0:1], v2, off
+; GFX9-PAL-NEXT:    s_endpgm
+;
+; GFX940-LABEL: sgpr_base_large_offset:
+; GFX940:       ; %bb.0: ; %entry
+; GFX940-NEXT:    s_add_i32 s0, s0, 0xffe8
+; GFX940-NEXT:    scratch_load_dword v2, off, s0
+; GFX940-NEXT:    s_waitcnt vmcnt(0)
+; GFX940-NEXT:    global_store_dword v[0:1], v2, off sc0 sc1
+; GFX940-NEXT:    s_endpgm
+;
+; GFX10-PAL-LABEL: sgpr_base_large_offset:
+; GFX10-PAL:       ; %bb.0: ; %entry
+; GFX10-PAL-NEXT:    s_getpc_b64 s[2:3]
+; GFX10-PAL-NEXT:    s_mov_b32 s2, s8
+; GFX10-PAL-NEXT:    s_load_dwordx2 s[2:3], s[2:3], 0x0
+; GFX10-PAL-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX10-PAL-NEXT:    s_and_b32 s3, s3, 0xffff
+; GFX10-PAL-NEXT:    s_add_u32 s2, s2, s5
+; GFX10-PAL-NEXT:    s_addc_u32 s3, s3, 0
+; GFX10-PAL-NEXT:    s_setreg_b32 hwreg(HW_REG_FLAT_SCR_LO), s2
+; GFX10-PAL-NEXT:    s_setreg_b32 hwreg(HW_REG_FLAT_SCR_HI), s3
+; GFX10-PAL-NEXT:    s_add_i32 s0, s0, 0xffe8
+; GFX10-PAL-NEXT:    scratch_load_dword v2, off, s0
+; GFX10-PAL-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-PAL-NEXT:    global_store_dword v[0:1], v2, off
+; GFX10-PAL-NEXT:    s_endpgm
+;
+; GFX11-PAL-LABEL: sgpr_base_large_offset:
+; GFX11-PAL:       ; %bb.0: ; %entry
+; GFX11-PAL-NEXT:    s_add_i32 s0, s0, 0xffe8
+; GFX11-PAL-NEXT:    scratch_load_b32 v2, off, s0
+; GFX11-PAL-NEXT:    s_waitcnt vmcnt(0)
+; GFX11-PAL-NEXT:    global_store_b32 v[0:1], v2, off
+; GFX11-PAL-NEXT:    s_nop 0
+; GFX11-PAL-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX11-PAL-NEXT:    s_endpgm
+;
+; GFX12-PAL-LABEL: sgpr_base_large_offset:
+; GFX12-PAL:       ; %bb.0: ; %entry
+; GFX12-PAL-NEXT:    scratch_load_b32 v2, off, s0 offset:-24
+; GFX12-PAL-NEXT:    s_wait_loadcnt 0x0
+; GFX12-PAL-NEXT:    global_store_b32 v[0:1], v2, off
+; GFX12-PAL-NEXT:    s_nop 0
+; GFX12-PAL-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX12-PAL-NEXT:    s_endpgm
+entry:
+  %scevgep28 = getelementptr i8, ptr addrspace(5) %scevgep, i32 65512
+  %0 = load i32, ptr addrspace(5) %scevgep28, align 4
+  store i32 %0, ptr addrspace(1) %out
+  ret void
+}
+
+define amdgpu_gs void @sgpr_base_negative_offset(ptr addrspace(1) %out, ptr addrspace(5) inreg %scevgep) {
+; GFX9-LABEL: sgpr_base_negative_offset:
+; GFX9:       ; %bb.0: ; %entry
+; GFX9-NEXT:    s_add_u32 flat_scratch_lo, s0, s5
+; GFX9-NEXT:    s_addc_u32 flat_scratch_hi, s1, 0
+; GFX9-NEXT:    s_addk_i32 s2, 0xffe8
+; GFX9-NEXT:    scratch_load_dword v2, off, s2
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-NEXT:    global_store_dword v[0:1], v2, off
+; GFX9-NEXT:    s_endpgm
+;
+; GFX10-LABEL: sgpr_base_negative_offset:
+; GFX10:       ; %bb.0: ; %entry
+; GFX10-NEXT:    s_add_u32 s0, s0, s5
+; GFX10-NEXT:    s_addc_u32 s1, s1, 0
+; GFX10-NEXT:    s_setreg_b32 hwreg(HW_REG_FLAT_SCR_LO), s0
+; GFX10-NEXT:    s_setreg_b32 hwreg(HW_REG_FLAT_SCR_HI), s1
+; GFX10-NEXT:    scratch_load_dword v2, off, s2 offset:-24
+; GFX10-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-NEXT:    global_store_dword v[0:1], v2, off
+; GFX10-NEXT:    s_endpgm
+;
+; GFX11-LABEL: sgpr_base_negative_offset:
+; GFX11:       ; %bb.0: ; %entry
+; GFX11-NEXT:    scratch_load_b32 v2, off, s0 offset:-24
+; GFX11-NEXT:    s_waitcnt vmcnt(0)
+; GFX11-NEXT:    global_store_b32 v[0:1], v2, off
+; GFX11-NEXT:    s_nop 0
+; GFX11-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX11-NEXT:    s_endpgm
+;
+; GFX12-LABEL: sgpr_base_negative_offset:
+; GFX12:       ; %bb.0: ; %entry
+; GFX12-NEXT:    scratch_load_b32 v2, off, s0 offset:-24
+; GFX12-NEXT:    s_wait_loadcnt 0x0
+; GFX12-NEXT:    global_store_b32 v[0:1], v2, off
+; GFX12-NEXT:    s_nop 0
+; GFX12-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX12-NEXT:    s_endpgm
+;
+; GFX9-PAL-LABEL: sgpr_base_negative_offset:
+; GFX9-PAL:       ; %bb.0: ; %entry
+; GFX9-PAL-NEXT:    s_getpc_b64 s[2:3]
+; GFX9-PAL-NEXT:    s_mov_b32 s2, s8
+; GFX9-PAL-NEXT:    s_load_dwordx2 s[2:3], s[2:3], 0x0
+; GFX9-PAL-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX9-PAL-NEXT:    s_and_b32 s3, s3, 0xffff
+; GFX9-PAL-NEXT:    s_add_u32 flat_scratch_lo, s2, s5
+; GFX9-PAL-NEXT:    s_addc_u32 flat_scratch_hi, s3, 0
+; GFX9-PAL-NEXT:    s_addk_i32 s0, 0xffe8
+; GFX9-PAL-NEXT:    scratch_load_dword v2, off, s0
+; GFX9-PAL-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-PAL-NEXT:    global_store_dword v[0:1], v2, off
+; GFX9-PAL-NEXT:    s_endpgm
+;
+; GFX940-LABEL: sgpr_base_negative_offset:
+; GFX940:       ; %bb.0: ; %entry
+; GFX940-NEXT:    s_addk_i32 s0, 0xffe8
+; GFX940-NEXT:    scratch_load_dword v2, off, s0
+; GFX940-NEXT:    s_waitcnt vmcnt(0)
+; GFX940-NEXT:    global_store_dword v[0:1], v2, off sc0 sc1
+; GFX940-NEXT:    s_endpgm
+;
+; GFX10-PAL-LABEL: sgpr_base_negative_offset:
+; GFX10-PAL:       ; %bb.0: ; %entry
+; GFX10-PAL-NEXT:    s_getpc_b64 s[2:3]
+; GFX10-PAL-NEXT:    s_mov_b32 s2, s8
+; GFX10-PAL-NEXT:    s_load_dwordx2 s[2:3], s[2:3], 0x0
+; GFX10-PAL-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX10-PAL-NEXT:    s_and_b32 s3, s3, 0xffff
+; GFX10-PAL-NEXT:    s_add_u32 s2, s2, s5
+; GFX10-PAL-NEXT:    s_addc_u32 s3, s3, 0
+; GFX10-PAL-NEXT:    s_setreg_b32 hwreg(HW_REG_FLAT_SCR_LO), s2
+; GFX10-PAL-NEXT:    s_setreg_b32 hwreg(HW_REG_FLAT_SCR_HI), s3
+; GFX10-PAL-NEXT:    scratch_load_dword v2, off, s0 offset:-24
+; GFX10-PAL-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-PAL-NEXT:    global_store_dword v[0:1], v2, off
+; GFX10-PAL-NEXT:    s_endpgm
+;
+; GFX11-PAL-LABEL: sgpr_base_negative_offset:
+; GFX11-PAL:       ; %bb.0: ; %entry
+; GFX11-PAL-NEXT:    scratch_load_b32 v2, off, s0 offset:-24
+; GFX11-PAL-NEXT:    s_waitcnt vmcnt(0)
+; GFX11-PAL-NEXT:    global_store_b32 v[0:1], v2, off
+; GFX11-PAL-NEXT:    s_nop 0
+; GFX11-PAL-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX11-PAL-NEXT:    s_endpgm
+;
+; GFX12-PAL-LABEL: sgpr_base_negative_offset:
+; GFX12-PAL:       ; %bb.0: ; %entry
+; GFX12-PAL-NEXT:    scratch_load_b32 v2, off, s0 offset:-24
+; GFX12-PAL-NEXT:    s_wait_loadcnt 0x0
+; GFX12-PAL-NEXT:    global_store_b32 v[0:1], v2, off
+; GFX12-PAL-NEXT:    s_nop 0
+; GFX12-PAL-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX12-PAL-NEXT:    s_endpgm
+entry:
+  %scevgep28 = getelementptr i8, ptr addrspace(5) %scevgep, i32 -24
+  %0 = load i32, ptr addrspace(5) %scevgep28, align 4
+  store i32 %0, ptr addrspace(1) %out
+  ret void
+}
+
 declare void @llvm.memset.p5.i64(ptr addrspace(5) nocapture writeonly, i8, i64, i1 immarg)
 declare i32 @llvm.amdgcn.workitem.id.x()