uselistorder: -mllvm -preserve-bc-use-list-order => -emit-llvm-uselists
Stop relying on `cl::opt` to pass along the driver's decision to
preserve use-lists. Create a new `-cc1` option called
`-emit-llvm-uselists` that does the right thing (when -emit-llvm-bc).
Note that despite its generic name, it *doesn't* do the right thing when
-emit-llvm (LLVM assembly) yet. I'll hook that up soon.
This doesn't really change the behaviour of the driver. The default is
still to preserve use-lists for `clang -emit-llvm` and `clang
-save-temps`, and nothing else. But it stops relying on global state
(and also is a nicer interface for hackers using `clang -cc1`).
llvm-svn: 234962
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 9632d4e..968f212 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -405,6 +405,10 @@
// Default Dwarf version is 4 if we are generating debug information.
Opts.DwarfVersion = 4;
+ if (const Arg *A =
+ Args.getLastArg(OPT_emit_llvm_uselists, OPT_no_emit_llvm_uselists))
+ Opts.EmitLLVMUseLists = A->getOption().getID() == OPT_emit_llvm_uselists;
+
Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);