[KeyInstr] init-agg pattern

Author: OCHyams

clang/lib/CodeGen/CGDecl.cpp

@@ -1227,6 +1227,7 @@ void CodeGenFunction::emitStoresForConstant(const VarDecl &D, Address Loc,
     }
     auto *I = Builder.CreateMemSet(
         Loc, llvm::ConstantInt::get(CGM.Int8Ty, Value), SizeVal, isVolatile);
+    addInstToCurrentSourceAtom(I, nullptr);
     if (IsAutoInit)
       I->addAnnotationMetadata("auto-init");
     return;

clang/test/DebugInfo/KeyInstructions/init-agg.cpp

@@ -6,7 +6,6 @@
 // store locations to be included in the atom group.
 
 int g;
-char gc;
 void a() {
 // CHECK: _Z1av()
 // CHECK: call void @llvm.memcpy{{.*}}, !dbg [[G1R1:!.*]]
@@ -24,9 +23,13 @@ void a() {
 // CHECK: store i8 99{{.*}}, !dbg [[G3R1]]
 // CHECK: store i8 100{{.*}}, !dbg [[G3R1]]
     char big[65536] = { 'a', 'b', 'c', 'd' };
+
+// CHECK: call void @llvm.memset{{.*}}, !dbg [[G4R1:!.*]]
+    char arr[] = { 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, };
 }
 
 // CHECK: [[G1R1]] = !DILocation({{.*}}, atomGroup: 1, atomRank: 1)
 // CHECK: [[G2R1]] = !DILocation({{.*}}, atomGroup: 2, atomRank: 1)
 // CHECK: [[G2R2]] = !DILocation({{.*}}, atomGroup: 2, atomRank: 2)
-// CHECK: [[G3R1]] = !DILocation({{.*}}, atomGroup: 3, atomRank: 1)
+// CHECK: [[G3R1]] = !DILocation({{.*}}, atomGroup: 3, atomRank: 1)
+// CHECK: [[G4R1]] = !DILocation({{.*}}, atomGroup: 4, atomRank: 1)