[WebAssembly] Change type of wake count to unsigned int

Summary:
We discussed this at the Nov 12th CG meeting, and decided to use the
unsigned semantics for the wake count.
Corresponding spec change:
WebAssembly/threads#110

Reviewers: sbc100

Subscribers: dschuff, jgravelle-google, sunfish, jfb, cfe-commits

Differential Revision: https://reviews.llvm.org/D54572

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@347005 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Basic/BuiltinsWebAssembly.def

@@ -37,7 +37,7 @@ BUILTIN(__builtin_wasm_rethrow, "v", "r")
 // Atomic wait and notify.
 BUILTIN(__builtin_wasm_atomic_wait_i32, "ii*iLLi", "n")
 BUILTIN(__builtin_wasm_atomic_wait_i64, "iLLi*LLiLLi", "n")
-BUILTIN(__builtin_wasm_atomic_notify, "Uii*i", "n")
+BUILTIN(__builtin_wasm_atomic_notify, "Uii*Ui", "n")
 
 // Saturating fp-to-int conversions
 BUILTIN(__builtin_wasm_trunc_saturate_s_i32_f32, "if", "nc")

test/CodeGen/builtins-wasm.c

@@ -77,7 +77,7 @@ int atomic_wait_i64(long long *addr, long long expected, long long timeout) {
   // WEBASSEMBLY64: call i32 @llvm.wasm.atomic.wait.i64(i64* %{{.*}}, i64 %{{.*}}, i64 %{{.*}})
 }
 
-unsigned int atomic_notify(int *addr, int count) {
+unsigned int atomic_notify(int *addr, unsigned int count) {
   return __builtin_wasm_atomic_notify(addr, count);
   // WEBASSEMBLY32: call i32 @llvm.wasm.atomic.notify(i32* %{{.*}}, i32 %{{.*}})
   // WEBASSEMBLY64: call i32 @llvm.wasm.atomic.notify(i32* %{{.*}}, i32 %{{.*}})