[clang] 49562d3 - Revert "[clang] Pass -clear-ast-before-backend in Clang::ConstructJob()"

[Arthur Eubanks via cfe-commits]

Author: Arthur Eubanks
Date: 2021-10-16T12:05:41-07:00
New Revision: 49562d3dfed0ed6983d29d040db7e46ef3bc833e

URL: https://github.com/llvm/llvm-project/commit/49562d3dfed0ed6983d29d040db7e46ef3bc833e
DIFF: https://github.com/llvm/llvm-project/commit/49562d3dfed0ed6983d29d040db7e46ef3bc833e.diff

LOG: Revert "[clang] Pass -clear-ast-before-backend in Clang::ConstructJob()"

This reverts commit 47eb99aa44ab1d20327d67a49d6c47163de76387.

This causes crashes with -print-stats: PR52193.

Added: 
    

Modified: 
    clang/lib/Driver/ToolChains/Clang.cpp
    clang/lib/Interpreter/Interpreter.cpp

Removed: 
    


################################################################################
diff  --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
index 83afbc3952d8..d2c08412d593 100644
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -4660,7 +4660,6 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
   // cleanup.
   if (!C.isForDiagnostics())
     CmdArgs.push_back("-disable-free");
-  CmdArgs.push_back("-clear-ast-before-backend");
 
 #ifdef NDEBUG
   const bool IsAssertBuild = false;

diff  --git a/clang/lib/Interpreter/Interpreter.cpp b/clang/lib/Interpreter/Interpreter.cpp
index d14940d2e132..02b3025297b6 100644
--- a/clang/lib/Interpreter/Interpreter.cpp
+++ b/clang/lib/Interpreter/Interpreter.cpp
@@ -113,10 +113,6 @@ CreateCI(const llvm::opt::ArgStringList &Argv) {
 
   Clang->getTarget().adjust(Clang->getDiagnostics(), Clang->getLangOpts());
 
-  // Don't clear the AST before backend codegen since we do codegen multiple
-  // times, reusing the same AST.
-  Clang->getCodeGenOpts().ClearASTBeforeBackend = false;
-
   return std::move(Clang);
 }