[WebAssembly] Rename except_ref type to exnref

Summary:
We agreed to rename `except_ref` to `exnref` for consistency with other
reference types in
https://github.com/WebAssembly/exception-handling/issues/79. This also
renames WebAssemblyInstrExceptRef.td to WebAssemblyInstrRef.td in order
to use the file for other reference types in future.

Reviewers: dschuff

Subscribers: sbc100, jgravelle-google, hiraditya, sunfish, jfb, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D64703

llvm-svn: 366145
diff --git a/llvm/test/CodeGen/WebAssembly/exception.ll b/llvm/test/CodeGen/WebAssembly/exception.ll
index 8f7687e..fc61f40 100644
--- a/llvm/test/CodeGen/WebAssembly/exception.ll
+++ b/llvm/test/CodeGen/WebAssembly/exception.ll
@@ -31,11 +31,11 @@
 ; CHECK:     global.get  ${{.+}}=, __stack_pointer
 ; CHECK:     try
 ; CHECK:       call      foo
-; CHECK:     catch     $[[EXCEPT_REF:[0-9]+]]=
+; CHECK:     catch     $[[EXNREF:[0-9]+]]=
 ; CHECK:       global.set  __stack_pointer
 ; CHECK:       block i32
-; CHECK:         br_on_exn 0, __cpp_exception, $[[EXCEPT_REF]]
-; CHECK:         rethrow   $[[EXCEPT_REF]]
+; CHECK:         br_on_exn 0, __cpp_exception, $[[EXNREF]]
+; CHECK:         rethrow   $[[EXNREF]]
 ; CHECK:       end_block
 ; CHECK:       extract_exception $[[EXN:[0-9]+]]=
 ; CHECK-DAG:   i32.store  __wasm_lpad_context
@@ -47,7 +47,7 @@
 ; CHECK:         call      __cxa_end_catch
 ; CHECK:         br        1
 ; CHECK:       end_block
-; CHECK:       rethrow   $[[EXCEPT_REF]]
+; CHECK:       rethrow   $[[EXNREF]]
 ; CHECK:     end_try
 define void @test_catch() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
 entry:
@@ -92,10 +92,10 @@
 ; CHECK-LABEL: test_cleanup:
 ; CHECK: try
 ; CHECK:   call      foo
-; CHECK: catch     $[[EXCEPT_REF:[0-9]+]]=
+; CHECK: catch     $[[EXNREF:[0-9]+]]=
 ; CHECK:   global.set  __stack_pointer
 ; CHECK:   i32.call  $drop=, _ZN4TempD2Ev
-; CHECK:   rethrow   $[[EXCEPT_REF]]
+; CHECK:   rethrow   $[[EXNREF]]
 ; CHECK: end_try
 define void @test_cleanup() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
 entry: