Revert D121556 "[randstruct] Add randomize structure layout support"

This reverts commit 3f0587d0c668202bb89d29a25432aa290e551a31.

Not all tests pass after a few rounds of fixes.

I spot one failure that std::shuffle (potentially different results with
different STL implementations) was misused and replaced it with llvm::shuffle,
but there appears to be another failure in a Windows build.

The latest failure is reported on https://reviews.llvm.org/D121556#3440383

1 files changed, 0 insertions, 17 deletions

diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 5181999..83de27b 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -94,7 +94,6 @@
 #include <cassert>
 #include <cstddef>
 #include <cstring>
-#include <fstream>
 #include <memory>
 #include <string>
 #include <tuple>
@@ -3686,9 +3685,6 @@ void CompilerInvocation::GenerateLangArgs(const LangOptions &Opts,
 
   for (const auto &MP : Opts.MacroPrefixMap)
     GenerateArg(Args, OPT_fmacro_prefix_map_EQ, MP.first + "=" + MP.second, SA);
-
-  if (!Opts.RandstructSeed.empty())
-    GenerateArg(Args, OPT_frandomize_layout_seed_EQ, Opts.RandstructSeed, SA);
 }
 
 bool CompilerInvocation::ParseLangArgs(LangOptions &Opts, ArgList &Args,
@@ -4241,19 +4237,6 @@ bool CompilerInvocation::ParseLangArgs(LangOptions &Opts, ArgList &Args,
       Diags.Report(diag::err_cc1_unbounded_vscale_min);
   }
 
-  if (const Arg *A = Args.getLastArg(OPT_frandomize_layout_seed_file_EQ)) {
-    std::ifstream SeedFile(A->getValue(0));
-
-    if (!SeedFile.is_open())
-      Diags.Report(diag::err_drv_cannot_open_randomize_layout_seed_file)
-          << A->getValue(0);
-
-    std::getline(SeedFile, Opts.RandstructSeed);
-  }
-
-  if (const Arg *A = Args.getLastArg(OPT_frandomize_layout_seed_EQ))
-    Opts.RandstructSeed = A->getValue(0);
-
   return Diags.getNumErrors() == NumErrorsBefore;
 }