[CSE] Precommit an AMDGPU test case for D149348

Differential Revision: https://reviews.llvm.org/D149349

llvm/test/CodeGen/AMDGPU/cse-convergent.ll

@@ -0,0 +1,65 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 2
+; RUN: llc -march=amdgcn -mcpu=gfx1010 -verify-machineinstrs < %s | FileCheck %s -check-prefix=GCN
+
+define i32 @test(i32 %val, i32 %cond) {
+; GCN-LABEL: test:
+; GCN:       ; %bb.0: ; %entry
+; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT:    s_waitcnt_vscnt null, 0x0
+; GCN-NEXT:    s_xor_saveexec_b32 s4, -1
+; GCN-NEXT:    buffer_store_dword v2, off, s[0:3], s32 ; 4-byte Folded Spill
+; GCN-NEXT:    buffer_store_dword v3, off, s[0:3], s32 offset:4 ; 4-byte Folded Spill
+; GCN-NEXT:    s_waitcnt_depctr 0xffe3
+; GCN-NEXT:    s_mov_b32 exec_lo, s4
+; GCN-NEXT:    s_or_saveexec_b32 s4, -1
+; GCN-NEXT:    v_mov_b32_e32 v2, 0
+; GCN-NEXT:    s_mov_b32 exec_lo, s4
+; GCN-NEXT:    v_mov_b32_e32 v3, v0
+; GCN-NEXT:    s_not_b32 exec_lo, exec_lo
+; GCN-NEXT:    v_mov_b32_e32 v3, 0
+; GCN-NEXT:    s_not_b32 exec_lo, exec_lo
+; GCN-NEXT:    s_or_saveexec_b32 s4, -1
+; GCN-NEXT:    v_mov_b32_dpp v2, v3 row_xmask:1 row_mask:0xf bank_mask:0xf
+; GCN-NEXT:    s_mov_b32 exec_lo, s4
+; GCN-NEXT:    v_mov_b32_e32 v4, 0
+; GCN-NEXT:    v_mov_b32_e32 v0, v2
+; GCN-NEXT:    v_cmp_eq_u32_e32 vcc_lo, 0, v1
+; GCN-NEXT:    s_and_saveexec_b32 s4, vcc_lo
+; GCN-NEXT:  ; %bb.1: ; %if
+; GCN-NEXT:    v_mov_b32_e32 v4, v0
+; GCN-NEXT:  ; %bb.2: ; %end
+; GCN-NEXT:    s_or_b32 exec_lo, exec_lo, s4
+; GCN-NEXT:    v_add_nc_u32_e32 v0, v0, v4
+; GCN-NEXT:    s_xor_saveexec_b32 s4, -1
+; GCN-NEXT:    s_clause 0x1
+; GCN-NEXT:    buffer_load_dword v2, off, s[0:3], s32
+; GCN-NEXT:    buffer_load_dword v3, off, s[0:3], s32 offset:4
+; GCN-NEXT:    s_waitcnt_depctr 0xffe3
+; GCN-NEXT:    s_mov_b32 exec_lo, s4
+; GCN-NEXT:    s_waitcnt vmcnt(0)
+; GCN-NEXT:    s_waitcnt_vscnt null, 0x0
+; GCN-NEXT:    s_setpc_b64 s[30:31]
+entry:
+  ; %x = subgroup operation over all lanes.
+  %x1 = call i32 @llvm.amdgcn.set.inactive.i32(i32 %val, i32 0)
+  %x2 = call i32 @llvm.amdgcn.update.dpp.i32(i32 0, i32 %x1, i32 353, i32 15, i32 15, i1 false)
+  %x3 = call i32 @llvm.amdgcn.strict.wwm.i32(i32 %x2)
+  %cmp = icmp eq i32 %cond, 0
+  br i1 %cmp, label %if, label %end
+
+if:
+  ; %y = subgroup operations over lanes satisfying %cond.
+  %y1 = call i32 @llvm.amdgcn.set.inactive.i32(i32 %val, i32 0)
+  %y2 = call i32 @llvm.amdgcn.update.dpp.i32(i32 0, i32 %y1, i32 353, i32 15, i32 15, i1 false)
+  %y3 = call i32 @llvm.amdgcn.strict.wwm.i32(i32 %y2)
+  br label %end
+
+end:
+  %y = phi i32 [0, %entry], [%y3, %if]
+  %ret = add i32 %x3, %y
+  ret i32 %ret
+}
+
+declare i32 @llvm.amdgcn.set.inactive.i32(i32, i32)
+declare i32 @llvm.amdgcn.update.dpp.i32(i32, i32, i32 immarg, i32 immarg, i32 immarg, i1 immarg)
+declare i32 @llvm.amdgcn.strict.wwm.i32(i32)