[AMDGPU] Precommit a test case for D124450

llvm/test/CodeGen/AMDGPU/setcc-multiple-use.ll

@@ -0,0 +1,49 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -march=amdgcn -mcpu=gfx1030 < %s | FileCheck %s
+
+; SelectionDAG generates a setcc node with multiple uses:
+;
+;  t23: i1 = setcc t3, Constant:i32<0>, setne:ch
+;        t17: i32,i1 = subcarry Constant:i32<1>, Constant:i32<0>, t23
+;      t25: i32 = select t23, t17, Constant:i32<0>
+
+define amdgpu_cs void @main() {
+; CHECK-LABEL: main:
+; CHECK:       ; %bb.0: ; %bb
+; CHECK-NEXT:    v_mov_b32_e32 v0, 0
+; CHECK-NEXT:    ds_read_b32 v1, v0
+; CHECK-NEXT:    s_waitcnt lgkmcnt(0)
+; CHECK-NEXT:    v_cmp_ne_u32_e32 vcc_lo, 0, v1
+; CHECK-NEXT:    s_cmpk_lg_u32 vcc_lo, 0x0
+; CHECK-NEXT:    s_subb_u32 s0, 1, 0
+; CHECK-NEXT:    v_cndmask_b32_e64 v1, 0, s0, vcc_lo
+; CHECK-NEXT:  .LBB0_1: ; %bb1
+; CHECK-NEXT:    ; =>This Loop Header: Depth=1
+; CHECK-NEXT:    ; Child Loop BB0_2 Depth 2
+; CHECK-NEXT:    v_cmp_eq_u32_e64 s0, 0, v0
+; CHECK-NEXT:  .LBB0_2: ; %bb3
+; CHECK-NEXT:    ; Parent Loop BB0_1 Depth=1
+; CHECK-NEXT:    ; => This Inner Loop Header: Depth=2
+; CHECK-NEXT:    v_mov_b32_e32 v0, v1
+; CHECK-NEXT:    s_and_b32 vcc_lo, exec_lo, s0
+; CHECK-NEXT:    s_cbranch_vccz .LBB0_2
+; CHECK-NEXT:    s_branch .LBB0_1
+bb:
+  %i = load i32, i32 addrspace(3)* null, align 16
+  br label %bb1
+
+bb1:
+  %i2 = phi i32 [ 0, %bb ], [ %i9, %bb5 ]
+  br label %bb3
+
+bb3:
+  %i4 = icmp eq i32 %i2, 0
+  br i1 %i4, label %bb5, label %bb3
+
+bb5:
+  %i6 = icmp ult i32 0, %i
+  %i7 = sext i1 %i6 to i32
+  %i8 = add i32 %i7, 1
+  %i9 = and i32 %i8, %i7
+  br label %bb1
+}