Options for Basic Block Sections, enabled in D68063 and D73674.

This patch adds clang options:
-fbasic-block-sections={all,<filename>,labels,none} and
-funique-basic-block-section-names.
LLVM Support for basic block sections is already enabled.

+ -fbasic-block-sections={all, <file>, labels, none} : Enables/Disables basic
block sections for all or a subset of basic blocks. "labels" only enables
basic block symbols.
+ -funique-basic-block-section-names: Enables unique section names for
basic block sections, disabled by default.

Differential Revision: https://reviews.llvm.org/D68049

1 files changed, 10 insertions, 1 deletions

diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index ce038d7..6f11eca 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -937,10 +937,19 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
   Opts.TrapFuncName = std::string(Args.getLastArgValue(OPT_ftrap_function_EQ));
   Opts.UseInitArray = !Args.hasArg(OPT_fno_use_init_array);
 
-  Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
+  Opts.BBSections =
+      std::string(Args.getLastArgValue(OPT_fbasic_block_sections_EQ, "none"));
+
+  // Basic Block Sections implies Function Sections.
+  Opts.FunctionSections =
+      Args.hasArg(OPT_ffunction_sections) ||
+      (Opts.BBSections != "none" && Opts.BBSections != "labels");
+
   Opts.DataSections = Args.hasArg(OPT_fdata_sections);
   Opts.StackSizeSection = Args.hasArg(OPT_fstack_size_section);
   Opts.UniqueSectionNames = !Args.hasArg(OPT_fno_unique_section_names);
+  Opts.UniqueBasicBlockSectionNames =
+      Args.hasArg(OPT_funique_basic_block_section_names);
   Opts.UniqueInternalLinkageNames =
       Args.hasArg(OPT_funique_internal_linkage_names);