Variable auto-init: also auto-init alloca

Summary:
alloca isn’t auto-init’d right now because it’s a different path in clang that
all the other stuff we support (it’s a builtin, not an expression).
Interestingly, alloca doesn’t have a type (as opposed to even VLA) so we can
really only initialize it with memset.

<rdar://problem/49794007>

Subscribers: jkorous, dexonsmith, cfe-commits, rjmccall, glider, kees, kcc, pcc

Tags: #clang

Differential Revision: https://reviews.llvm.org/D60548

llvm-svn: 358243

1 files changed, 27 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/PatternInit.h b/clang/lib/CodeGen/PatternInit.h
new file mode 100644
index 00000000000..f117dde9ac6
--- /dev/null
+++ b/clang/lib/CodeGen/PatternInit.h
@@ -0,0 +1,27 @@
+//===- PatternInit - Pattern initialization ---------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_LIB_CODEGEN_PATTERNINIT_H
+#define LLVM_CLANG_LIB_CODEGEN_PATTERNINIT_H
+
+namespace llvm {
+class Constant;
+class Type;
+} // namespace llvm
+
+namespace clang {
+namespace CodeGen {
+
+class CodeGenModule;
+
+llvm::Constant *initializationPatternFor(CodeGenModule &, llvm::Type *);
+
+} // end namespace CodeGen
+} // end namespace clang
+
+#endif