[LoongArch] Pre-commit test for #88694. NFC

Author: wangleiat

llvm/test/CodeGen/LoongArch/gep-imm.ll

@@ -0,0 +1,52 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
+; RUN: llc --mtriple=loongarch64 < %s | FileCheck %s
+
+define void @test(ptr %sp, ptr %t, i32 %n) {
+; CHECK-LABEL: test:
+; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    move $a3, $zero
+; CHECK-NEXT:    ld.d $a4, $a0, 0
+; CHECK-NEXT:    lu12i.w $a0, 1
+; CHECK-NEXT:    ori $a5, $a0, 3904
+; CHECK-NEXT:    add.d $a0, $a1, $a5
+; CHECK-NEXT:    add.d $a1, $a4, $a5
+; CHECK-NEXT:    addi.w $a2, $a2, 0
+; CHECK-NEXT:    addi.w $a4, $a3, 0
+; CHECK-NEXT:    bge $a4, $a2, .LBB0_2
+; CHECK-NEXT:    .p2align 4, , 16
+; CHECK-NEXT:  .LBB0_1: # %while_body
+; CHECK-NEXT:    # =>This Inner Loop Header: Depth=1
+; CHECK-NEXT:    addi.d $a4, $a3, 1
+; CHECK-NEXT:    st.w $a4, $a1, 0
+; CHECK-NEXT:    st.w $a3, $a1, 4
+; CHECK-NEXT:    st.w $a4, $a0, 0
+; CHECK-NEXT:    st.w $a3, $a0, 4
+; CHECK-NEXT:    move $a3, $a4
+; CHECK-NEXT:    addi.w $a4, $a3, 0
+; CHECK-NEXT:    blt $a4, $a2, .LBB0_1
+; CHECK-NEXT:  .LBB0_2: # %while_end
+; CHECK-NEXT:    ret
+entry:
+  %s = load ptr, ptr %sp
+  br label %while_cond
+
+while_cond:
+  %phi = phi i32 [ 0, %entry ], [ %i, %while_body ]
+  %gep0 = getelementptr [65536 x i32], ptr %s, i64 0, i64 2000
+  %gep1 = getelementptr [65536 x i32], ptr %s, i64 0, i64 2001
+  %gep2 = getelementptr [65536 x i32], ptr %t, i64 0, i64 2000
+  %gep3 = getelementptr [65536 x i32], ptr %t, i64 0, i64 2001
+  %cmp = icmp slt i32 %phi, %n
+  br i1 %cmp, label %while_body, label %while_end
+
+while_body:
+  %i = add i32 %phi, 1
+  store i32 %i, ptr %gep0
+  store i32 %phi, ptr %gep1
+  store i32 %i, ptr %gep2
+  store i32 %phi, ptr %gep3
+  br label %while_cond
+
+while_end:
+  ret void
+}