[emscripten] Recognize invariant intrinsics which are now overloaded

Invariant intrinsics are now suffixed with types.

Author: Dylan McKay

lib/Target/JSBackend/CallHandlers.h

@@ -599,11 +599,11 @@ DEF_CALL_HANDLER(llvm_lifetime_end, {
   return "";
 })
 
-DEF_CALL_HANDLER(llvm_invariant_start, {
+DEF_CALL_HANDLER(llvm_invariant_start_p0i8, {
   return "";
 })
 
-DEF_CALL_HANDLER(llvm_invariant_end, {
+DEF_CALL_HANDLER(llvm_invariant_end_p0i8, {
   return "";
 })
 
@@ -1625,8 +1625,8 @@ void setupCallHandlers() {
   SETUP_CALL_HANDLER(llvm_dbg_value);
   SETUP_CALL_HANDLER(llvm_lifetime_start);
   SETUP_CALL_HANDLER(llvm_lifetime_end);
-  SETUP_CALL_HANDLER(llvm_invariant_start);
-  SETUP_CALL_HANDLER(llvm_invariant_end);
+  SETUP_CALL_HANDLER(llvm_invariant_start_p0i8);
+  SETUP_CALL_HANDLER(llvm_invariant_end_p0i8);
   SETUP_CALL_HANDLER(llvm_prefetch);
   SETUP_CALL_HANDLER(llvm_objectsize_i32_p0i8);
   SETUP_CALL_HANDLER(llvm_flt_rounds);

test/CodeGen/JS/invariant-intrinsics.ll

@@ -10,11 +10,11 @@ declare void @bar(i8*)
 
 define void @foo() {
   %p = alloca i8
-  %i = call {}* @llvm.invariant.start(i64 1, i8* %p)
+  %i = call {}* @llvm.invariant.start.p0i8(i64 1, i8* %p)
   call void @bar(i8* %p)
-  call void @llvm.invariant.end({}* %i, i64 1, i8* %p)
+  call void @llvm.invariant.end.p0i8({}* %i, i64 1, i8* %p)
   ret void
 }
 
-declare {}* @llvm.invariant.start(i64, i8* nocapture)
-declare void @llvm.invariant.end({}*, i64, i8* nocapture)
+declare {}* @llvm.invariant.start.p0i8(i64, i8* nocapture)
+declare void @llvm.invariant.end.p0i8({}*, i64, i8* nocapture)