[WebAssembly] Move call_indirect_alloca to call.ll

[aheejin]

Summary

Not sure the distinction between call.ll and call-indirect.ll,
because call.ll also seems to contain many call_indirect tests. Also
before D147033 call-indirect.ll only contained a single test and it
also tests it with obj2yaml, so I guess that file was created for
testing functionalities for object files as well.

We can probably merge these two someday. But anyway, this moves
call_indirect_alloca I added in D147033 to call.ll, given that that
file contains more call_indirect tests and I'm planning to add more
call_indirect tests in a followup CL.

llvm/test/CodeGen/WebAssembly/call-indirect.ll

 ; REF:        call_indirect __indirect_function_table, () -> ()
 ; NOREF:      call_indirect () -> ()
 ; CHECK-NEXT: end_function
 define void @call_indirect_void(ptr %callee) {
   call void %callee()
   ret void
 }
 
-; CHECK-LABEL: call_indirect_alloca:
-; CHECK-NEXT: .functype call_indirect_alloca () -> ()
-; CHECK:      local.tee  0
-; CHECK-NEXT: global.set  __stack_pointer
-; CHECK-NEXT: local.get  0
-; CHECK-NEXT: i32.const  12
-; CHECK-NEXT: i32.add
-; REF:        call_indirect __indirect_function_table, () -> ()
-; NOREF:      call_indirect () -> ()
-define void @call_indirect_alloca() {
-entry:
-  %ptr = alloca i32, align 4
-  call void %ptr()
-  ret void
-}
-
 ; OBJ:    Imports:
 ; OBJ-NEXT:      - Module:          env
 ; OBJ-NEXT:        Field:           __linear_memory
 ; OBJ-NEXT:        Kind:            MEMORY
 ; OBJ-NEXT:        Memory:
 ; OBJ-NEXT:          Minimum:         0x0
 ; OBJ-NEXT:      - Module:          env
-; OBJ-NEXT:        Field:           __stack_pointer
-; OBJ-NEXT:        Kind:            GLOBAL
-; OBJ-NEXT:        GlobalType:      I32
-; OBJ-NEXT:        GlobalMutable:   true
-; OBJ-NEXT:      - Module:          env
 ; OBJ-NEXT:        Field:           __indirect_function_table
 ; OBJ-NEXT:        Kind:            TABLE

llvm/test/CodeGen/WebAssembly/call.ll

 bb1:
   call void getelementptr (i8, ptr @void_nullary, i32 ptrtoint (ptr @other_void_nullary to i32))()
   br label %bb2
 bb2:
   call void inttoptr (i32 ptrtoint (ptr @void_nullary to i32) to ptr)()
   ret void
 }
 
+; Allocas should be lowered to call_indirects.
+; CHECK-LABEL: call_indirect_alloca:
+; CHECK:      local.tee  $push{{.*}}=, [[L0:[0-9]+]]
+; CHECK-NEXT: global.set  __stack_pointer
+; CHECK-NEXT: local.get  $push{{.*}}=, [[L0]]
+; CHECK-NEXT: i32.const  $push{{.*}}=, 12
+; CHECK-NEXT: i32.add
+; CHECK-NEXT: call_indirect  $pop{{.*}}
+define void @call_indirect_alloca() {
+entry:
+  %ptr = alloca i32, align 4
+  call void %ptr()
+  ret void
+}
+
 ; TODO: test the following:
 ;  - More argument combinations.
 ;  - Tail call.
 ;  - Interesting returns (struct, multiple).
 ;  - Vararg.