[WebAssembly] Switch to a more traditional assembly syntax

This new syntax is built around putting each instruction on its own line
in a "mnemonic op, op, op" like syntax. It also uses conventional data
section directives like ".byte" and so on rather than requiring everything
to be in hierarchical S-expression format. This is a more natural syntax
for a ".s" file format from the perspective of LLVM MC and related tools,
while remaining easy to translate into other forms as needed.

llvm-svn: 249364
diff --git a/llvm/test/CodeGen/WebAssembly/load.ll b/llvm/test/CodeGen/WebAssembly/load.ll
index 098e473..f8fce53 100644
--- a/llvm/test/CodeGen/WebAssembly/load.ll
+++ b/llvm/test/CodeGen/WebAssembly/load.ll
@@ -5,41 +5,53 @@
 target datalayout = "e-p:32:32-i64:64-n32:64-S128"
 target triple = "wasm32-unknown-unknown"
 
-; CHECK-LABEL: (func $ldi32
-; CHECK-NEXT: (param i32) (result i32)
-; CHECK-NEXT: (set_local @0 (argument 0))
-; CHECK-NEXT: (set_local @1 (load_i32 @0))
-; CHECK-NEXT: (return @1)
+; CHECK-LABEL: ldi32:
+; CHECK-NEXT: .param i32{{$}}
+; CHECK-NEXT: .result i32{{$}}
+; CHECK-NEXT: @0{{$}}
+; CHECK-NEXT: set_local @1, pop{{$}}
+; CHECK-NEXT: load_i32 @1{{$}}
+; CHECK-NEXT: set_local @2, pop{{$}}
+; CHECK-NEXT: return @2{{$}}
 define i32 @ldi32(i32 *%p) {
   %v = load i32, i32* %p
   ret i32 %v
 }
 
-; CHECK-LABEL: (func $ldi64
-; CHECK-NEXT: (param i32) (result i64)
-; CHECK-NEXT: (set_local @0 (argument 0))
-; CHECK-NEXT: (set_local @1 (load_i64 @0))
-; CHECK-NEXT: (return @1)
+; CHECK-LABEL: ldi64:
+; CHECK-NEXT: .param i32{{$}}
+; CHECK-NEXT: .result i64{{$}}
+; CHECK-NEXT: @0{{$}}
+; CHECK-NEXT: set_local @1, pop{{$}}
+; CHECK-NEXT: load_i64 @1{{$}}
+; CHECK-NEXT: set_local @2, pop{{$}}
+; CHECK-NEXT: return @2{{$}}
 define i64 @ldi64(i64 *%p) {
   %v = load i64, i64* %p
   ret i64 %v
 }
 
-; CHECK-LABEL: (func $ldf32
-; CHECK-NEXT: (param i32) (result f32)
-; CHECK-NEXT: (set_local @0 (argument 0))
-; CHECK-NEXT: (set_local @1 (load_f32 @0))
-; CHECK-NEXT: (return @1)
+; CHECK-LABEL: ldf32:
+; CHECK-NEXT: .param i32{{$}}
+; CHECK-NEXT: .result f32{{$}}
+; CHECK-NEXT: @0{{$}}
+; CHECK-NEXT: set_local @1, pop{{$}}
+; CHECK-NEXT: load_f32 @1{{$}}
+; CHECK-NEXT: set_local @2, pop{{$}}
+; CHECK-NEXT: return @2{{$}}
 define float @ldf32(float *%p) {
   %v = load float, float* %p
   ret float %v
 }
 
-; CHECK-LABEL: (func $ldf64
-; CHECK-NEXT: (param i32) (result f64)
-; CHECK-NEXT: (set_local @0 (argument 0))
-; CHECK-NEXT: (set_local @1 (load_f64 @0))
-; CHECK-NEXT: (return @1)
+; CHECK-LABEL: ldf64:
+; CHECK-NEXT: .param i32{{$}}
+; CHECK-NEXT: .result f64{{$}}
+; CHECK-NEXT: @0{{$}}
+; CHECK-NEXT: set_local @1, pop{{$}}
+; CHECK-NEXT: load_f64 @1{{$}}
+; CHECK-NEXT: set_local @2, pop{{$}}
+; CHECK-NEXT: return @2{{$}}
 define double @ldf64(double *%p) {
   %v = load double, double* %p
   ret double %v