add test case

Author: HerrCai0907

llvm/test/CodeGen/WebAssembly/disable-feature.ll

@@ -1,11 +1,11 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
-; RUN: llc < %s -mattr=-sign-ext | FileCheck %s
+; RUN: llc < %s -mattr=-sign-ext,-bulk-memory | FileCheck %s
 
 target triple = "wasm32-unknown-unknown"
 
-define i8 @ashr(i8 %v, i8 %x) {
-; CHECK-LABEL: ashr:
-; CHECK:         .functype ashr (i32, i32) -> (i32)
+define i8 @not_use_extend8_s(i8 %v, i8 %x) {
+; CHECK-LABEL: not_use_extend8_s:
+; CHECK:         .functype not_use_extend8_s (i32, i32) -> (i32)
 ; CHECK-NEXT:  # %bb.0:
 ; CHECK-NEXT:    local.get 0
 ; CHECK-NEXT:    i32.const 24
@@ -20,3 +20,34 @@ define i8 @ashr(i8 %v, i8 %x) {
   %a = ashr i8 %v, %x
   ret i8 %a
 }
+
+attributes #0 = { "target-features"="+bulk-memory," }
+
+declare void @llvm.memset.p0.i32(ptr, i8, i32, i1)
+
+define void @lower_bulk_memory(i8 %val) #0 {
+; CHECK-LABEL: lower_bulk_memory:
+; CHECK:         .functype lower_bulk_memory (i32) -> ()
+; CHECK-NEXT:    .local i32
+; CHECK-NEXT:  # %bb.0:
+; CHECK-NEXT:    global.get __stack_pointer
+; CHECK-NEXT:    i32.const 112
+; CHECK-NEXT:    i32.sub
+; CHECK-NEXT:    local.tee 1
+; CHECK-NEXT:    global.set __stack_pointer
+; CHECK-NEXT:    local.get 1
+; CHECK-NEXT:    i32.const 12
+; CHECK-NEXT:    i32.add
+; CHECK-NEXT:    local.get 0
+; CHECK-NEXT:    i32.const 100
+; CHECK-NEXT:    call memset
+; CHECK-NEXT:    drop
+; CHECK-NEXT:    local.get 1
+; CHECK-NEXT:    i32.const 112
+; CHECK-NEXT:    i32.add
+; CHECK-NEXT:    global.set __stack_pointer
+; CHECK-NEXT:    # fallthrough-return
+  %a = alloca [100 x i8]
+  call void @llvm.memset.p0.i32(ptr %a, i8 %val, i32 100, i1 false)
+  ret void
+}