tmsriram updated this revision to Diff 259626.
tmsriram marked 5 inline comments as done.
tmsriram added a comment.
Herald added subscribers: dexonsmith, steven_wu, hiraditya, arichardson, emaste.
Herald added a reviewer: espindola.
Document the flags, rename the options.
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D68049/new/
https://reviews.llvm.org/D68049
Files:
clang/docs/ClangCommandLineReference.rst
clang/docs/UsersManual.rst
clang/include/clang/Basic/CodeGenOptions.def
clang/include/clang/Basic/CodeGenOptions.h
clang/include/clang/Driver/Options.td
clang/lib/CodeGen/BackendUtil.cpp
clang/lib/Driver/ToolChains/Clang.cpp
clang/lib/Frontend/CompilerInvocation.cpp
clang/test/CodeGen/basic-block-sections.c
clang/test/CodeGen/basic-block-sections.funcnames
clang/test/Driver/fbasic-block-sections.c
clang/test/Driver/funique-basic-block-section-names.c
lld/ELF/Config.h
lld/ELF/Driver.cpp
lld/ELF/LTO.cpp
llvm/include/llvm/CodeGen/CommandFlags.h
llvm/include/llvm/CodeGen/Passes.h
llvm/include/llvm/Target/TargetMachine.h
llvm/include/llvm/Target/TargetOptions.h
llvm/lib/CodeGen/BBSectionsPrepare.cpp
llvm/lib/CodeGen/CommandFlags.cpp
llvm/lib/CodeGen/MachineFunction.cpp
llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
Index: clang/docs/UsersManual.rst
===================================================================
--- clang/docs/UsersManual.rst
+++ clang/docs/UsersManual.rst
@@ -1677,6 +1677,16 @@
on ELF targets when using the integrated assembler. This flag currently
only has an effect on ELF targets.
+**-fbasic-block-sections=[labels, all, list=<arg>, none]**
+
+ Controls whether Clang emits a label for each basic block. Further, with
+ values "all" and "list=arg", each basic block or a subset of basic blocks
+ can be placed in its own unique section.
+
+ Basic block sections allow the linker to reorder basic blocks and enables
+ link-time optimizations like whole program inter-procedural basic block
+ reordering.
+
Profile Guided Optimization
---------------------------
Index: clang/docs/ClangCommandLineReference.rst
===================================================================
--- clang/docs/ClangCommandLineReference.rst
+++ clang/docs/ClangCommandLineReference.rst
@@ -1331,6 +1331,10 @@
.. option:: -fautolink, -fno-autolink
+.. option:: -fbasic-block-sections=labels, -fbasic-block-sections=all, -fbasic-block-sections=list=<arg>, -fbasic-block-sections=none
+
+Generate labels for each basic block or place each basic block or a subset of basic blocks in its own section
+
.. option:: -fblocks, -fno-blocks
Enable the 'blocks' language feature
Index: lld/ELF/Driver.cpp
===================================================================
--- lld/ELF/Driver.cpp
+++ lld/ELF/Driver.cpp
@@ -930,7 +930,7 @@
config->ltoSampleProfile = args.getLastArgValue(OPT_lto_sample_profile);
config->ltoBasicBlockSections =
args.getLastArgValue(OPT_lto_basicblock_sections);
- config->ltoUniqueBBSectionNames =
+ config->ltoUniqueBasicBlockSectionNames =
args.hasFlag(OPT_lto_unique_bb_section_names,
OPT_no_lto_unique_bb_section_names, false);
config->mapFile = args.getLastArgValue(OPT_Map);
Index: lld/ELF/Config.h
===================================================================
--- lld/ELF/Config.h
+++ lld/ELF/Config.h
@@ -167,7 +167,7 @@
bool ltoCSProfileGenerate;
bool ltoDebugPassManager;
bool ltoNewPassManager;
- bool ltoUniqueBBSectionNames;
+ bool ltoUniqueBasicBlockSectionNames;
bool ltoWholeProgramVisibility;
bool mergeArmExidx;
bool mipsN32Abi = false;
Index: lld/ELF/LTO.cpp
===================================================================
--- lld/ELF/LTO.cpp
+++ lld/ELF/LTO.cpp
@@ -79,7 +79,7 @@
// Check if basic block sections must be used.
// Allowed values for --lto-basicblock-sections are "all", "labels",
// "<file name specifying basic block ids>", or none. This is the equivalent
- // of -fbasicblock-sections= flag in clang.
+ // of -fbasic-block-sections= flag in clang.
if (!config->ltoBasicBlockSections.empty()) {
if (config->ltoBasicBlockSections == "all") {
c.Options.BBSections = BasicBlockSection::All;
@@ -100,7 +100,8 @@
}
}
- c.Options.UniqueBBSectionNames = config->ltoUniqueBBSectionNames;
+ c.Options.UniqueBasicBlockSectionNames =
+ config->ltoUniqueBasicBlockSectionNames;
if (auto relocModel = getRelocModelFromCMModel())
c.RelocModel = *relocModel;
Index: llvm/lib/CodeGen/MachineFunction.cpp
===================================================================
--- llvm/lib/CodeGen/MachineFunction.cpp
+++ llvm/lib/CodeGen/MachineFunction.cpp
@@ -340,7 +340,7 @@
MBBNumbering.resize(BlockNo);
}
-/// This is used with -fbasicblock-sections or -fbasicblock-labels option.
+/// This is used with -fbasic-block-sections or -fbasicblock-labels option.
/// A unary encoding of basic block labels is done to keep ".strtab" sizes
/// small.
void MachineFunction::createBBLabels() {
Index: llvm/lib/CodeGen/BBSectionsPrepare.cpp
===================================================================
--- llvm/lib/CodeGen/BBSectionsPrepare.cpp
+++ llvm/lib/CodeGen/BBSectionsPrepare.cpp
@@ -9,15 +9,15 @@
// BBSectionsPrepare implementation.
//
// The purpose of this pass is to assign sections to basic blocks when
-// -fbasicblock-sections= option is used. Further, with profile information only
-// the subset of basic blocks with profiles are placed in separate sections and
-// the rest are grouped in a cold section. The exception handling blocks are
+// -fbasic-block-sections= option is used. Further, with profile information
+// only the subset of basic blocks with profiles are placed in separate sections
+// and the rest are grouped in a cold section. The exception handling blocks are
// treated specially to ensure they are all in one seciton.
//
// Basic Block Sections
// ====================
//
-// With option, -fbasicblock-sections=list, every function may be split into
+// With option, -fbasic-block-sections=list, every function may be split into
// clusters of basic blocks. Every cluster will be emitted into a separate
// section with its basic blocks sequenced in the given order. To get the
// optimized performance, the clusters must form an optimal BB layout for the
@@ -48,7 +48,7 @@
// Basic Block Labels
// ==================
//
-// With -fbasicblock-sections=labels, or when a basic block is placed in a
+// With -fbasic-block-sections=labels, or when a basic block is placed in a
// unique section, it is labelled with a symbol. This allows easy mapping of
// virtual addresses from PMU profiles back to the corresponding basic blocks.
// Since the number of basic blocks is large, the labeling bloats the symbol
Index: llvm/include/llvm/CodeGen/CommandFlags.h
===================================================================
--- llvm/include/llvm/CodeGen/CommandFlags.h
+++ llvm/include/llvm/CodeGen/CommandFlags.h
@@ -104,7 +104,7 @@
bool getUniqueSectionNames();
-bool getUniqueBBSectionNames();
+bool getUniqueBasicBlockSectionNames();
llvm::EABI getEABIVersion();
Index: llvm/lib/CodeGen/CommandFlags.cpp
===================================================================
--- llvm/lib/CodeGen/CommandFlags.cpp
+++ llvm/lib/CodeGen/CommandFlags.cpp
@@ -74,7 +74,7 @@
CGOPT(unsigned, TLSSize)
CGOPT(bool, EmulatedTLS)
CGOPT(bool, UniqueSectionNames)
-CGOPT(bool, UniqueBBSectionNames)
+CGOPT(bool, UniqueBasicBlockSectionNames)
CGOPT(EABI, EABIVersion)
CGOPT(DebuggerKind, DebuggerTuningOpt)
CGOPT(bool, EnableStackSizeSection)
@@ -346,11 +346,11 @@
cl::init(true));
CGBINDOPT(UniqueSectionNames);
- static cl::opt<bool> UniqueBBSectionNames(
+ static cl::opt<bool> UniqueBasicBlockSectionNames(
"unique-bb-section-names",
cl::desc("Give unique names to every basic block section"),
cl::init(false));
- CGBINDOPT(UniqueBBSectionNames);
+ CGBINDOPT(UniqueBasicBlockSectionNames);
static cl::opt<EABI> EABIVersion(
"meabi", cl::desc("Set EABI type (default depends on triple):"),
@@ -456,7 +456,7 @@
Options.FunctionSections = getFunctionSections();
Options.BBSections = getBBSectionsMode(Options);
Options.UniqueSectionNames = getUniqueSectionNames();
- Options.UniqueBBSectionNames = getUniqueBBSectionNames();
+ Options.UniqueBasicBlockSectionNames = getUniqueBasicBlockSectionNames();
Options.TLSSize = getTLSSize();
Options.EmulatedTLS = getEmulatedTLS();
Options.ExplicitEmulatedTLS = EmulatedTLSView->getNumOccurrences() > 0;
Index: llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
===================================================================
--- llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
+++ llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
@@ -875,7 +875,7 @@
// For regular sections, either use a unique name, or a unique ID for the
// section.
default:
- if (TM.getUniqueBBSectionNames()) {
+ if (TM.getUniqueBasicBlockSectionNames()) {
Name += ".";
Name += MBB.getSymbol()->getName();
} else
Index: llvm/include/llvm/Target/TargetMachine.h
===================================================================
--- llvm/include/llvm/Target/TargetMachine.h
+++ llvm/include/llvm/Target/TargetMachine.h
@@ -246,7 +246,9 @@
bool getUniqueSectionNames() const { return Options.UniqueSectionNames; }
/// Return true if unique basic block section names must be generated.
- bool getUniqueBBSectionNames() const { return Options.UniqueBBSectionNames; }
+ bool getUniqueBasicBlockSectionNames() const {
+ return Options.UniqueBasicBlockSectionNames;
+ }
/// Return true if data objects should be emitted into their own section,
/// corresponds to -fdata-sections.
@@ -261,7 +263,7 @@
}
/// If basic blocks should be emitted into their own section,
- /// corresponding to -fbasicblock-sections.
+ /// corresponding to -fbasic-block-sections.
llvm::BasicBlockSection getBBSectionsType() const {
return Options.BBSections;
}
Index: llvm/include/llvm/CodeGen/Passes.h
===================================================================
--- llvm/include/llvm/CodeGen/Passes.h
+++ llvm/include/llvm/CodeGen/Passes.h
@@ -44,7 +44,7 @@
FunctionPass *createUnreachableBlockEliminationPass();
/// createBBSectionsPrepare Pass - This pass assigns sections to machine basic
- /// blocks and is enabled with -fbasicblock-sections.
+ /// blocks and is enabled with -fbasic-block-sections.
/// Buf is a memory buffer that contains the list of functions and basic
/// block ids to selectively enable basic block sections.
MachineFunctionPass *createBBSectionsPreparePass(const MemoryBuffer *Buf);
Index: llvm/include/llvm/Target/TargetOptions.h
===================================================================
--- llvm/include/llvm/Target/TargetOptions.h
+++ llvm/include/llvm/Target/TargetOptions.h
@@ -121,7 +121,7 @@
EnableFastISel(false), EnableGlobalISel(false), UseInitArray(false),
DisableIntegratedAS(false), RelaxELFRelocations(false),
FunctionSections(false), DataSections(false),
- UniqueSectionNames(true), UniqueBBSectionNames(false),
+ UniqueSectionNames(true), UniqueBasicBlockSectionNames(false),
TrapUnreachable(false), NoTrapAfterNoreturn(false), TLSSize(0),
EmulatedTLS(false), ExplicitEmulatedTLS(false), EnableIPRA(false),
EmitStackSizeSection(false), EnableMachineOutliner(false),
@@ -234,7 +234,7 @@
unsigned UniqueSectionNames : 1;
/// Use unique names for basic block sections.
- unsigned UniqueBBSectionNames : 1;
+ unsigned UniqueBasicBlockSectionNames : 1;
/// Emit target-specific trap instruction for 'unreachable' IR instructions.
unsigned TrapUnreachable : 1;
Index: clang/test/Driver/fbasic-block-sections.c
===================================================================
--- /dev/null
+++ clang/test/Driver/fbasic-block-sections.c
@@ -0,0 +1,9 @@
+// RUN: %clang -### -fbasic-block-sections=none %s -S 2>&1 | FileCheck -check-prefix=CHECK-OPT-NONE %s
+// RUN: %clang -### -fbasic-block-sections=all %s -S 2>&1 | FileCheck -check-prefix=CHECK-OPT-ALL %s
+// RUN: %clang -### -fbasic-block-sections=list=%s %s -S 2>&1 | FileCheck -check-prefix=CHECK-OPT-LIST %s
+// RUN: %clang -### -fbasic-block-sections=labels %s -S 2>&1 | FileCheck -check-prefix=CHECK-OPT-LABELS %s
+//
+// CHECK-OPT-NONE: "-fbasic-block-sections=none"
+// CHECK-OPT-ALL: "-fbasic-block-sections=all"
+// CHECK-OPT-LIST: "-fbasic-block-sections={{[^ ]*}}fbasic-block-sections.c"
+// CHECK-OPT-LABELS: "-fbasic-block-sections=labels"
Index: clang/test/Driver/funique-basic-block-section-names.c
===================================================================
--- /dev/null
+++ clang/test/Driver/funique-basic-block-section-names.c
@@ -0,0 +1,4 @@
+// RUN: %clang -### -funique-basic-block-section-names %s -S 2>&1 | FileCheck -check-prefix=CHECK-OPT %s
+// RUN: %clang -### -funique-basic-block-section-names -fno-unique-basic-block-section-names %s -S 2>&1 | FileCheck -check-prefix=CHECK-NOOPT %s
+// CHECK-OPT: "-funique-basic-block-section-names"
+// CHECK-NOOPT-NOT: "-funique-basic-block-section-names"
Index: clang/test/CodeGen/basic-block-sections.funcnames
===================================================================
--- /dev/null
+++ clang/test/CodeGen/basic-block-sections.funcnames
@@ -0,0 +1 @@
+!world
Index: clang/test/CodeGen/basic-block-sections.c
===================================================================
--- /dev/null
+++ clang/test/CodeGen/basic-block-sections.c
@@ -0,0 +1,47 @@
+// REQUIRES: x86-registered-target
+
+// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -S -o - < %s | FileCheck %s --check-prefix=PLAIN
+// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -S -fbasic-block-sections=all -fbasic-block-sections=none -o - < %s | FileCheck %s --check-prefix=PLAIN
+
+// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -S -fbasic-block-sections=labels -o - < %s | FileCheck %s --check-prefix=BB_LABELS
+// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -S -fbasic-block-sections=all -o - < %s | FileCheck %s --check-prefix=BB_WORLD --check-prefix=BB_ALL
+// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -S -fbasic-block-sections=list=%S/basic-block-sections.funcnames -o - < %s | FileCheck %s --check-prefix=BB_WORLD --check-prefix=BB_LIST
+// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -S -fbasic-block-sections=all -funique-basic-block-section-names -o - < %s | FileCheck %s --check-prefix=UNIQUE
+
+int world(int a) {
+ if (a > 10)
+ return 10;
+ else if (a > 5)
+ return 5;
+ else
+ return 0;
+}
+
+int another(int a) {
+ if (a > 10)
+ return 20;
+ return 0;
+}
+
+// PLAIN-NOT: section
+// PLAIN: world:
+//
+// BB_LABELS-NOT: section
+// BB_LABELS: world:
+// BB_LABELS: a.BB.world:
+// BB_LABELS: aa.BB.world:
+// BB_LABELS: a.BB.another:
+//
+// BB_WORLD: .section .text.world,"ax",@progbits{{$}}
+// BB_WORLD: world:
+// BB_WORLD: .section .text.world,"ax",@progbits,unique
+// BB_WORLD: a.BB.world:
+// BB_WORLD: .section .text.another,"ax",@progbits
+// BB_ALL: .section .text.another,"ax",@progbits,unique
+// BB_ALL: a.BB.another:
+// BB_LIST-NOT: .section .text.another,"ax",@progbits,unique
+// BB_LIST: another:
+// BB_LIST-NOT: a.BB.another:
+//
+// UNIQUE: .section .text.world.a.BB.world,
+// UNIQUE: .section .text.another.a.BB.another,
Index: clang/lib/Frontend/CompilerInvocation.cpp
===================================================================
--- clang/lib/Frontend/CompilerInvocation.cpp
+++ clang/lib/Frontend/CompilerInvocation.cpp
@@ -955,10 +955,19 @@
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.MergeFunctions = Args.hasArg(OPT_fmerge_functions);
Index: clang/lib/Driver/ToolChains/Clang.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Clang.cpp
+++ clang/lib/Driver/ToolChains/Clang.cpp
@@ -4252,8 +4252,11 @@
options::OPT_fno_function_sections,
options::OPT_fdata_sections,
options::OPT_fno_data_sections,
+ options::OPT_fbasic_block_sections_EQ,
options::OPT_funique_section_names,
options::OPT_fno_unique_section_names,
+ options::OPT_funique_basic_block_section_names,
+ options::OPT_fno_unique_basic_block_section_names,
options::OPT_mrestrict_it,
options::OPT_mno_restrict_it,
options::OPT_mstackrealign,
@@ -4849,6 +4852,16 @@
CmdArgs.push_back("-ffunction-sections");
}
+ if (Arg *A = Args.getLastArg(options::OPT_fbasic_block_sections_EQ)) {
+ StringRef Val = A->getValue();
+ if (Val != "all" && Val != "labels" && Val != "none" &&
+ !(Val.startswith("list=") && llvm::sys::fs::exists(Val.substr(5))))
+ D.Diag(diag::err_drv_invalid_value)
+ << A->getAsString(Args) << A->getValue();
+ else
+ A->render(Args, CmdArgs);
+ }
+
if (Args.hasFlag(options::OPT_fdata_sections, options::OPT_fno_data_sections,
UseSeparateSections)) {
CmdArgs.push_back("-fdata-sections");
@@ -4858,6 +4871,10 @@
options::OPT_fno_unique_section_names, true))
CmdArgs.push_back("-fno-unique-section-names");
+ if (Args.hasFlag(options::OPT_funique_basic_block_section_names,
+ options::OPT_fno_unique_basic_block_section_names, false))
+ CmdArgs.push_back("-funique-basic-block-section-names");
+
Args.AddLastArg(CmdArgs, options::OPT_finstrument_functions,
options::OPT_finstrument_functions_after_inlining,
options::OPT_finstrument_function_entry_bare);
Index: clang/lib/CodeGen/BackendUtil.cpp
===================================================================
--- clang/lib/CodeGen/BackendUtil.cpp
+++ clang/lib/CodeGen/BackendUtil.cpp
@@ -485,9 +485,30 @@
Options.NoZerosInBSS = CodeGenOpts.NoZeroInitializedInBSS;
Options.UnsafeFPMath = CodeGenOpts.UnsafeFPMath;
Options.StackAlignmentOverride = CodeGenOpts.StackAlignment;
+
+ Options.BBSections =
+ llvm::StringSwitch<llvm::BasicBlockSection>(CodeGenOpts.BBSections)
+ .Case("all", llvm::BasicBlockSection::All)
+ .Case("labels", llvm::BasicBlockSection::Labels)
+ .StartsWith("list=", llvm::BasicBlockSection::List)
+ .Case("none", llvm::BasicBlockSection::None)
+ .Default(llvm::BasicBlockSection::None);
+
+ if (Options.BBSections == llvm::BasicBlockSection::List) {
+ ErrorOr<std::unique_ptr<MemoryBuffer>> MBOrErr =
+ MemoryBuffer::getFile(CodeGenOpts.BBSections.substr(5));
+ if (!MBOrErr)
+ errs() << "Error loading basic block sections function list file: "
+ << MBOrErr.getError().message() << "\n";
+ else
+ Options.BBSectionsFuncListBuf = std::move(*MBOrErr);
+ }
+
Options.FunctionSections = CodeGenOpts.FunctionSections;
Options.DataSections = CodeGenOpts.DataSections;
Options.UniqueSectionNames = CodeGenOpts.UniqueSectionNames;
+ Options.UniqueBasicBlockSectionNames =
+ CodeGenOpts.UniqueBasicBlockSectionNames;
Options.TLSSize = CodeGenOpts.TLSSize;
Options.EmulatedTLS = CodeGenOpts.EmulatedTLS;
Options.ExplicitEmulatedTLS = CodeGenOpts.ExplicitEmulatedTLS;
Index: clang/include/clang/Driver/Options.td
===================================================================
--- clang/include/clang/Driver/Options.td
+++ clang/include/clang/Driver/Options.td
@@ -1987,6 +1987,9 @@
Flags<[CC1Option]>,
HelpText<"Place each function in its own section">;
def fno_function_sections : Flag<["-"], "fno-function-sections">, Group<f_Group>;
+def fbasic_block_sections_EQ : Joined<["-"], "fbasic-block-sections=">, Group<f_Group>,
+ Flags<[CC1Option, CC1AsOption]>,
+ HelpText<"Place each function's basic blocks in unique sections (ELF Only) : all | labels | none | <filename>">;
def fdata_sections : Flag <["-"], "fdata-sections">, Group<f_Group>,
Flags<[CC1Option]>, HelpText<"Place each data in its own section">;
def fno_data_sections : Flag <["-"], "fno-data-sections">, Group<f_Group>;
@@ -2001,6 +2004,12 @@
def fno_unique_section_names : Flag <["-"], "fno-unique-section-names">,
Group<f_Group>, Flags<[CC1Option]>;
+def funique_basic_block_section_names : Flag <["-"], "funique-basic-block-section-names">,
+ Group<f_Group>, Flags<[CC1Option]>,
+ HelpText<"Use unique names for basic block sections (ELF Only)">;
+def fno_unique_basic_block_section_names : Flag <["-"], "fno-unique-basic-block-section-names">,
+ Group<f_Group>;
+
def fstrict_return : Flag<["-"], "fstrict-return">, Group<f_Group>,
Flags<[CC1Option]>,
HelpText<"Always treat control flow paths that fall off the end of a "
Index: clang/include/clang/Basic/CodeGenOptions.h
===================================================================
--- clang/include/clang/Basic/CodeGenOptions.h
+++ clang/include/clang/Basic/CodeGenOptions.h
@@ -110,6 +110,22 @@
Embed_Marker // Embed a marker as a placeholder for bitcode.
};
+ // This field stores one of the allowed values for the option
+ // -fbasic-block-sections=. The allowed values with this option are:
+ // {"labels", "all", "<filename>", "none"}.
+ //
+ // "labels": Only generate basic block symbols (labels) for all basic
+ // blocks, do not generate unique sections for basic blocks.
+ // Use the machine basic block id in the symbol name to
+ // associate profile info from virtual address to machine
+ // basic block.
+ // "all" : Generate basic block sections for all basic blocks.
+ // "<filename>": Generate basic block sections for a subset of basic blocks.
+ // The functions and the machine basic block ids are specified
+ // in the file.
+ // "none": Disable sections/labels for basic blocks.
+ std::string BBSections;
+
enum class FramePointerKind {
None, // Omit all frame pointers.
NonLeaf, // Keep non-leaf frame pointers.
Index: clang/include/clang/Basic/CodeGenOptions.def
===================================================================
--- clang/include/clang/Basic/CodeGenOptions.def
+++ clang/include/clang/Basic/CodeGenOptions.def
@@ -48,6 +48,9 @@
///< aliases to base ctors when possible.
CODEGENOPT(DataSections , 1, 0) ///< Set when -fdata-sections is enabled.
CODEGENOPT(UniqueSectionNames, 1, 1) ///< Set for -funique-section-names.
+CODEGENOPT(UniqueBasicBlockSectionNames, 1, 1) ///< Set for -funique-basic-block-section-names,
+ ///< Produce unique section names with
+ ///< basic block sections.
ENUM_CODEGENOPT(FramePointer, FramePointerKind, 2, FramePointerKind::None) /// frame-pointer: all,non-leaf,none
CODEGENOPT(DisableFree , 1, 0) ///< Don't free memory.
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