[all-commits] [llvm/llvm-project] a4f84f: [CodeGen] Track DeferredDecls that have been emitted

[Jun Zhang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a4f84f1b2e92ea79b70b9961049a1af7d9e1f2fa
      https://github.com/llvm/llvm-project/commit/a4f84f1b2e92ea79b70b9961049a1af7d9e1f2fa
  Author: Jun Zhang <jun at junz.org>
  Date:   2022-08-27 (Sat, 27 Aug 2022)

  Changed paths:
    M clang/lib/CodeGen/CodeGenModule.cpp
    A clang/test/Interpreter/lambda.cpp

  Log Message:
  -----------
  [CodeGen] Track DeferredDecls that have been emitted

If we run into a first usage or definition of a mangled name, and
there's a DeferredDecl that associated with it, we should remember it we
need to emit it later on.

Without this patch, clang-repl hits a JIT symbol not found error:
clang-repl> extern "C" int printf(const char *, ...);
clang-repl> auto l1 = []() { printf("ONE\n"); return 42; };
clang-repl> auto l2 = []() { printf("TWO\n"); return 17; };
clang-repl> auto r1 = l1();
ONE
clang-repl> auto r2 = l2();
TWO
clang-repl> auto r3 = l2();
JIT session error: Symbols not found: [ l2 ]
error: Failed to materialize symbols: { (main,
{ r3, orc_init_func.incr_module_5, $.incr_module_5.inits.0 }) }

Signed-off-by: Jun Zhang <jun at junz.org>

Differential Revision: https://reviews.llvm.org/D130831