[WebAssembly] Combine emscripten SjLj tests

[aheejin]

Summary

Combine a test in lower-em-sjlj-longjmp-only.ll into lower-em-sjlj.ll,
because the test command is the same and I don't see any reason it
should be a separate file. Also converted tabs into spaces and fixed
indentations in lower-em-sjlj-sret.ll. (lower-em-sjlj.ll uses a
different test command (llc), so it couldn't be combined)

llvm/test/CodeGen/WebAssembly/lower-em-sjlj-longjmp-only.ll

-; RUN: opt < %s -wasm-lower-em-ehsjlj -S | FileCheck %s
-
-target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
-target triple = "wasm32-unknown-unknown"
-
-%struct.__jmp_buf_tag = type { [6 x i32], i32, %struct.__sigset_t }
-%struct.__sigset_t = type { [32 x i32] }
-
-@buffer = global [1 x %struct.__jmp_buf_tag] zeroinitializer, align 16
-
-; Tests if program does not crash when there's no setjmp function calls in the
-; module.
-
-; CHECK: call void @emscripten_longjmp_jmpbuf
-define void @longjmp_only() {
-entry:
-  call void @longjmp(%struct.__jmp_buf_tag* getelementptr inbounds ([1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* @buffer, i32 0, i32 0), i32 1) #1
-  unreachable
-}
-
-; Function Attrs: noreturn nounwind
-declare void @longjmp(%struct.__jmp_buf_tag*, i32) #1
-
-attributes #1 = { noreturn nounwind }

llvm/test/CodeGen/WebAssembly/lower-em-sjlj-sret.ll

 
 ; Test the combination of backend legalization of large return types and the
 ; Emscripten sjlj transformation
 define {i32, i32} @legalized_to_sret() {
 entry:
   %env = alloca [1 x %struct.__jmp_buf_tag], align 16
   %arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %env, i32 0, i32 0
   %call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0
   ; This is the function pointer to pass to invoke.
   ; It needs to be the first argument (that's what we're testing here)
-; CHECK:  i32.const $push[[FPTR:[0-9]+]]=, returns_struct
+  ; CHECK: i32.const $push[[FPTR:[0-9]+]]=, returns_struct
   ; This is the sret stack region (as an offset from the stack pointer local)
-; CHECK:  call  "__invoke_{i32.i32}", $pop[[FPTR]]
+  ; CHECK: call "__invoke_{i32.i32}", $pop[[FPTR]]
   %ret = call {i32, i32} @returns_struct()
   ret {i32, i32} %ret
 }
 
 attributes #0 = { returns_twice }

llvm/test/CodeGen/WebAssembly/lower-em-sjlj.ll

entry:
   %buf = alloca [1 x %struct.__jmp_buf_tag], align 16
   %arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0
   %call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0
 ; CHECK: call cc{{.*}} i8* @"__invoke_i8*_i32_%struct.__jmp_buf_tag*"([[ARGS:.*]]) #[[ALLOCSIZE_ATTR:[0-9]+]]
   %alloc = call i8* @allocator(i32 20, %struct.__jmp_buf_tag* %arraydecay) #3
   ret i8 *%alloc
 }
 
+; Tests if program does not crash when there's no setjmp function calls in the
+; module.
+@buffer = global [1 x %struct.__jmp_buf_tag] zeroinitializer, align 16
+define void @longjmp_only() {
+entry:
+  ; CHECK: call void @emscripten_longjmp_jmpbuf
+  call void @longjmp(%struct.__jmp_buf_tag* getelementptr inbounds ([1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* @buffer, i32 0, i32 0), i32 1) #1
+  unreachable
+}
+
 declare void @foo()
 ; Function Attrs: returns_twice
 declare i32 @setjmp(%struct.__jmp_buf_tag*) #0
 ; Function Attrs: noreturn
 declare void @longjmp(%struct.__jmp_buf_tag*, i32) #1
 declare i32 @__gxx_personality_v0(...)
 declare i8* @__cxa_begin_catch(i8*)
 declare void @__cxa_end_catch()