[Mlir-commits] [clang] [flang] [mlir] [Flang][Driver][MLIR] Add support for fomit-frame-pointer (PR #72135)
llvmlistbot at llvm.org
llvmlistbot at llvm.org
Mon Nov 13 08:54:50 PST 2023
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-mlir-tensor
Author: Radu Salavat (Radu2k)
<details>
<summary>Changes</summary>
Made appropriate changes in Flang and MLIR to support 'fomit-frame-pointer' and 'fno-omit-frame-pointer'.
---
Patch is 33.79 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/72135.diff
22 Files Affected:
- (modified) clang/include/clang/Driver/Options.td (+9-5)
- (modified) clang/lib/Driver/ToolChains/Clang.cpp (-133)
- (modified) clang/lib/Driver/ToolChains/CommonArgs.cpp (+141)
- (modified) clang/lib/Driver/ToolChains/CommonArgs.h (+4)
- (modified) clang/lib/Driver/ToolChains/Flang.cpp (+19)
- (modified) flang/include/flang/Frontend/CodeGenOptions.def (+1)
- (modified) flang/include/flang/Frontend/CodeGenOptions.h (+23)
- (modified) flang/include/flang/Tools/CrossToolHelpers.h (+2)
- (modified) flang/lib/Frontend/CompilerInvocation.cpp (+13)
- (modified) flang/lib/Frontend/FrontendActions.cpp (+5)
- (modified) flang/test/Driver/driver-help-hidden.f90 (+1)
- (modified) flang/test/Driver/driver-help.f90 (+2)
- (modified) flang/test/Driver/frontend-forwarding.f90 (+2)
- (modified) mlir/include/mlir/Dialect/LLVMIR/LLVMEnums.td (+19)
- (modified) mlir/include/mlir/Dialect/LLVMIR/LLVMOps.td (+2-1)
- (modified) mlir/include/mlir/Dialect/Tensor/IR/TensorBase.td (+24-20)
- (modified) mlir/lib/Dialect/LLVMIR/IR/LLVMDialect.cpp (+23-2)
- (modified) mlir/lib/Target/LLVMIR/ModuleImport.cpp (+10-1)
- (modified) mlir/lib/Target/LLVMIR/ModuleTranslation.cpp (+4)
- (modified) mlir/test/Dialect/LLVMIR/func.mlir (+6)
- (added) mlir/test/Target/LLVMIR/Import/frame-pointer.ll (+7)
- (added) mlir/test/Target/LLVMIR/frame-pointer.mlir (+8)
``````````diff
diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index d1b67a448b2a59b..bf99786d017b318 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -3147,7 +3147,8 @@ def fno_ms_compatibility : Flag<["-"], "fno-ms-compatibility">, Group<f_Group>,
def fno_objc_legacy_dispatch : Flag<["-"], "fno-objc-legacy-dispatch">, Group<f_Group>;
def fno_objc_weak : Flag<["-"], "fno-objc-weak">, Group<f_Group>,
Visibility<[ClangOption, CC1Option]>;
-def fno_omit_frame_pointer : Flag<["-"], "fno-omit-frame-pointer">, Group<f_Group>;
+def fno_omit_frame_pointer : Flag<["-"], "fno-omit-frame-pointer">, Group<f_Group>,
+ Visibility<[ClangOption, FlangOption]>;
defm operator_names : BoolFOption<"operator-names",
LangOpts<"CXXOperatorNames">, Default<cplusplus.KeyPath>,
NegFlag<SetFalse, [], [ClangOption, CC1Option],
@@ -3273,6 +3274,7 @@ defm objc_avoid_heapify_local_blocks : BoolFOption<"objc-avoid-heapify-local-blo
BothFlags<[], [CC1Option], " to avoid heapifying local blocks">>;
def fomit_frame_pointer : Flag<["-"], "fomit-frame-pointer">, Group<f_Group>,
+ Visibility<[ClangOption, FlangOption]>,
HelpText<"Omit the frame pointer from functions that don't need it. "
"Some stack unwinding cases, such as profilers and sanitizers, may prefer specifying -fno-omit-frame-pointer. "
"On many targets, -O1 and higher omit the frame pointer by default. "
@@ -6752,10 +6754,7 @@ def new_struct_path_tbaa : Flag<["-"], "new-struct-path-tbaa">,
def mdebug_pass : Separate<["-"], "mdebug-pass">,
HelpText<"Enable additional debug output">,
MarshallingInfoString<CodeGenOpts<"DebugPass">>;
-def mframe_pointer_EQ : Joined<["-"], "mframe-pointer=">,
- HelpText<"Specify which frame pointers to retain.">, Values<"all,non-leaf,none">,
- NormalizedValuesScope<"CodeGenOptions::FramePointerKind">, NormalizedValues<["All", "NonLeaf", "None"]>,
- MarshallingInfoEnum<CodeGenOpts<"FramePointer">, "None">;
+
def mabi_EQ_ieeelongdouble : Flag<["-"], "mabi=ieeelongdouble">,
HelpText<"Use IEEE 754 quadruple-precision for long double">,
MarshallingInfoFlag<LangOpts<"PPCIEEELongDouble">>;
@@ -7368,6 +7367,11 @@ def pic_level : Separate<["-"], "pic-level">,
def pic_is_pie : Flag<["-"], "pic-is-pie">,
HelpText<"File is for a position independent executable">,
MarshallingInfoFlag<LangOpts<"PIE">>;
+
+def mframe_pointer_EQ : Joined<["-"], "mframe-pointer=">,
+ HelpText<"Specify which frame pointers to retain.">, Values<"all,non-leaf,none">,
+ NormalizedValuesScope<"CodeGenOptions::FramePointerKind">, NormalizedValues<["All", "NonLeaf", "None"]>,
+ MarshallingInfoEnum<CodeGenOpts<"FramePointer">, "None">;
} // let Visibility = [CC1Option, FC1Option]
diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
index 3b98c7ae6e6ec66..3273bd1d2c0c6fa 100644
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -409,139 +409,6 @@ static bool ShouldEnableAutolink(const ArgList &Args, const ToolChain &TC,
Default);
}
-static bool mustUseNonLeafFramePointerForTarget(const llvm::Triple &Triple) {
- switch (Triple.getArch()){
- default:
- return false;
- case llvm::Triple::arm:
- case llvm::Triple::thumb:
- // ARM Darwin targets require a frame pointer to be always present to aid
- // offline debugging via backtraces.
- return Triple.isOSDarwin();
- }
-}
-
-static bool useFramePointerForTargetByDefault(const ArgList &Args,
- const llvm::Triple &Triple) {
- if (Args.hasArg(options::OPT_pg) && !Args.hasArg(options::OPT_mfentry))
- return true;
-
- if (Triple.isAndroid()) {
- switch (Triple.getArch()) {
- case llvm::Triple::aarch64:
- case llvm::Triple::arm:
- case llvm::Triple::armeb:
- case llvm::Triple::thumb:
- case llvm::Triple::thumbeb:
- case llvm::Triple::riscv64:
- return true;
- default:
- break;
- }
- }
-
- switch (Triple.getArch()) {
- case llvm::Triple::xcore:
- case llvm::Triple::wasm32:
- case llvm::Triple::wasm64:
- case llvm::Triple::msp430:
- // XCore never wants frame pointers, regardless of OS.
- // WebAssembly never wants frame pointers.
- return false;
- case llvm::Triple::ppc:
- case llvm::Triple::ppcle:
- case llvm::Triple::ppc64:
- case llvm::Triple::ppc64le:
- case llvm::Triple::riscv32:
- case llvm::Triple::riscv64:
- case llvm::Triple::sparc:
- case llvm::Triple::sparcel:
- case llvm::Triple::sparcv9:
- case llvm::Triple::amdgcn:
- case llvm::Triple::r600:
- case llvm::Triple::csky:
- case llvm::Triple::loongarch32:
- case llvm::Triple::loongarch64:
- return !areOptimizationsEnabled(Args);
- default:
- break;
- }
-
- if (Triple.isOSFuchsia() || Triple.isOSNetBSD()) {
- return !areOptimizationsEnabled(Args);
- }
-
- if (Triple.isOSLinux() || Triple.isOSHurd()) {
- switch (Triple.getArch()) {
- // Don't use a frame pointer on linux if optimizing for certain targets.
- case llvm::Triple::arm:
- case llvm::Triple::armeb:
- case llvm::Triple::thumb:
- case llvm::Triple::thumbeb:
- case llvm::Triple::mips64:
- case llvm::Triple::mips64el:
- case llvm::Triple::mips:
- case llvm::Triple::mipsel:
- case llvm::Triple::systemz:
- case llvm::Triple::x86:
- case llvm::Triple::x86_64:
- return !areOptimizationsEnabled(Args);
- default:
- return true;
- }
- }
-
- if (Triple.isOSWindows()) {
- switch (Triple.getArch()) {
- case llvm::Triple::x86:
- return !areOptimizationsEnabled(Args);
- case llvm::Triple::x86_64:
- return Triple.isOSBinFormatMachO();
- case llvm::Triple::arm:
- case llvm::Triple::thumb:
- // Windows on ARM builds with FPO disabled to aid fast stack walking
- return true;
- default:
- // All other supported Windows ISAs use xdata unwind information, so frame
- // pointers are not generally useful.
- return false;
- }
- }
-
- return true;
-}
-
-static CodeGenOptions::FramePointerKind
-getFramePointerKind(const ArgList &Args, const llvm::Triple &Triple) {
- // We have 4 states:
- //
- // 00) leaf retained, non-leaf retained
- // 01) leaf retained, non-leaf omitted (this is invalid)
- // 10) leaf omitted, non-leaf retained
- // (what -momit-leaf-frame-pointer was designed for)
- // 11) leaf omitted, non-leaf omitted
- //
- // "omit" options taking precedence over "no-omit" options is the only way
- // to make 3 valid states representable
- Arg *A = Args.getLastArg(options::OPT_fomit_frame_pointer,
- options::OPT_fno_omit_frame_pointer);
- bool OmitFP = A && A->getOption().matches(options::OPT_fomit_frame_pointer);
- bool NoOmitFP =
- A && A->getOption().matches(options::OPT_fno_omit_frame_pointer);
- bool OmitLeafFP =
- Args.hasFlag(options::OPT_momit_leaf_frame_pointer,
- options::OPT_mno_omit_leaf_frame_pointer,
- Triple.isAArch64() || Triple.isPS() || Triple.isVE() ||
- (Triple.isAndroid() && Triple.isRISCV64()));
- if (NoOmitFP || mustUseNonLeafFramePointerForTarget(Triple) ||
- (!OmitFP && useFramePointerForTargetByDefault(Args, Triple))) {
- if (OmitLeafFP)
- return CodeGenOptions::FramePointerKind::NonLeaf;
- return CodeGenOptions::FramePointerKind::All;
- }
- return CodeGenOptions::FramePointerKind::None;
-}
-
/// Add a CC1 option to specify the debug compilation directory.
static const char *addDebugCompDirArg(const ArgList &Args,
ArgStringList &CmdArgs,
diff --git a/clang/lib/Driver/ToolChains/CommonArgs.cpp b/clang/lib/Driver/ToolChains/CommonArgs.cpp
index 5d2cd1959b06925..f81bca14363a22a 100644
--- a/clang/lib/Driver/ToolChains/CommonArgs.cpp
+++ b/clang/lib/Driver/ToolChains/CommonArgs.cpp
@@ -24,6 +24,7 @@
#include "MSP430.h"
#include "Solaris.h"
#include "clang/Basic/CharInfo.h"
+#include "clang/Basic/CodeGenOptions.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/ObjCRuntime.h"
#include "clang/Basic/Version.h"
@@ -71,6 +72,146 @@ using namespace clang::driver::tools;
using namespace clang;
using namespace llvm::opt;
+static bool useFramePointerForTargetByDefault(const llvm::opt::ArgList &Args,
+ const llvm::Triple &Triple) {
+ if (Args.hasArg(clang::driver::options::OPT_pg) &&
+ !Args.hasArg(clang::driver::options::OPT_mfentry))
+ return true;
+
+ if (Triple.isAndroid()) {
+ switch (Triple.getArch()) {
+ case llvm::Triple::aarch64:
+ case llvm::Triple::arm:
+ case llvm::Triple::armeb:
+ case llvm::Triple::thumb:
+ case llvm::Triple::thumbeb:
+ case llvm::Triple::riscv64:
+ return true;
+ default:
+ break;
+ }
+ }
+
+ switch (Triple.getArch()) {
+ case llvm::Triple::xcore:
+ case llvm::Triple::wasm32:
+ case llvm::Triple::wasm64:
+ case llvm::Triple::msp430:
+ // XCore never wants frame pointers, regardless of OS.
+ // WebAssembly never wants frame pointers.
+ return false;
+ case llvm::Triple::ppc:
+ case llvm::Triple::ppcle:
+ case llvm::Triple::ppc64:
+ case llvm::Triple::ppc64le:
+ case llvm::Triple::riscv32:
+ case llvm::Triple::riscv64:
+ case llvm::Triple::sparc:
+ case llvm::Triple::sparcel:
+ case llvm::Triple::sparcv9:
+ case llvm::Triple::amdgcn:
+ case llvm::Triple::r600:
+ case llvm::Triple::csky:
+ case llvm::Triple::loongarch32:
+ case llvm::Triple::loongarch64:
+ return !clang::driver::tools::areOptimizationsEnabled(Args);
+ default:
+ break;
+ }
+
+ if (Triple.isOSFuchsia() || Triple.isOSNetBSD()) {
+ return !clang::driver::tools::areOptimizationsEnabled(Args);
+ }
+
+ //if (Triple.isOSLinux() || Triple.getOS() == llvm::Triple::CloudABI ||
+ if (Triple.isOSLinux() || Triple.isOSHurd()) {
+ switch (Triple.getArch()) {
+ // Don't use a frame pointer on linux if optimizing for certain targets.
+ case llvm::Triple::arm:
+ case llvm::Triple::armeb:
+ case llvm::Triple::thumb:
+ case llvm::Triple::thumbeb:
+ case llvm::Triple::mips64:
+ case llvm::Triple::mips64el:
+ case llvm::Triple::mips:
+ case llvm::Triple::mipsel:
+ case llvm::Triple::systemz:
+ case llvm::Triple::x86:
+ case llvm::Triple::x86_64:
+ return !clang::driver::tools::areOptimizationsEnabled(Args);
+ default:
+ return true;
+ }
+ }
+
+ if (Triple.isOSWindows()) {
+ switch (Triple.getArch()) {
+ case llvm::Triple::x86:
+ return !clang::driver::tools::areOptimizationsEnabled(Args);
+ case llvm::Triple::x86_64:
+ return Triple.isOSBinFormatMachO();
+ case llvm::Triple::arm:
+ case llvm::Triple::thumb:
+ // Windows on ARM builds with FPO disabled to aid fast stack walking
+ return true;
+ default:
+ // All other supported Windows ISAs use xdata unwind information, so frame
+ // pointers are not generally useful.
+ return false;
+ }
+ }
+
+ return true;
+}
+
+static bool mustUseNonLeafFramePointerForTarget(const llvm::Triple &Triple) {
+ switch (Triple.getArch()) {
+ default:
+ return false;
+ case llvm::Triple::arm:
+ case llvm::Triple::thumb:
+ // ARM Darwin targets require a frame pointer to be always present to aid
+ // offline debugging via backtraces.
+ return Triple.isOSDarwin();
+ }
+}
+
+clang::CodeGenOptions::FramePointerKind
+getFramePointerKind(const llvm::opt::ArgList &Args,
+ const llvm::Triple &Triple) {
+ // We have 4 states:
+ //
+ // 00) leaf retained, non-leaf retained
+ // 01) leaf retained, non-leaf omitted (this is invalid)
+ // 10) leaf omitted, non-leaf retained
+ // (what -momit-leaf-frame-pointer was designed for)
+ // 11) leaf omitted, non-leaf omitted
+ //
+ // "omit" options taking precedence over "no-omit" options is the only way
+ // to make 3 valid states representable
+ llvm::opt::Arg *A =
+ Args.getLastArg(clang::driver::options::OPT_fomit_frame_pointer,
+ clang::driver::options::OPT_fno_omit_frame_pointer);
+
+ bool OmitFP = A && A->getOption().matches(
+ clang::driver::options::OPT_fomit_frame_pointer);
+ bool NoOmitFP = A && A->getOption().matches(
+ clang::driver::options::OPT_fno_omit_frame_pointer);
+ bool OmitLeafFP =
+ Args.hasFlag(clang::driver::options::OPT_momit_leaf_frame_pointer,
+ clang::driver::options::OPT_mno_omit_leaf_frame_pointer,
+ Triple.isAArch64() || Triple.isPS() || Triple.isVE() ||
+ (Triple.isAndroid() && Triple.isRISCV64()));
+ if (NoOmitFP || mustUseNonLeafFramePointerForTarget(Triple) ||
+ (!OmitFP && useFramePointerForTargetByDefault(Args, Triple))) {
+ if (OmitLeafFP)
+ return clang::CodeGenOptions::FramePointerKind::NonLeaf;
+ return clang::CodeGenOptions::FramePointerKind::All;
+ }
+ return clang::CodeGenOptions::FramePointerKind::None;
+}
+
+
static void renderRpassOptions(const ArgList &Args, ArgStringList &CmdArgs,
const StringRef PluginOptPrefix) {
if (const Arg *A = Args.getLastArg(options::OPT_Rpass_EQ))
diff --git a/clang/lib/Driver/ToolChains/CommonArgs.h b/clang/lib/Driver/ToolChains/CommonArgs.h
index 0a0951c5386e601..abe8948c5387dce 100644
--- a/clang/lib/Driver/ToolChains/CommonArgs.h
+++ b/clang/lib/Driver/ToolChains/CommonArgs.h
@@ -9,6 +9,7 @@
#ifndef LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_COMMONARGS_H
#define LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_COMMONARGS_H
+#include "clang/Basic/CodeGenOptions.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/InputInfo.h"
#include "clang/Driver/Multilib.h"
@@ -215,4 +216,7 @@ void addOpenMPDeviceRTL(const Driver &D, const llvm::opt::ArgList &DriverArgs,
} // end namespace driver
} // end namespace clang
+clang::CodeGenOptions::FramePointerKind getFramePointerKind(
+ const llvm::opt::ArgList &Args, const llvm::Triple &Triple);
+
#endif // LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_COMMONARGS_H
diff --git a/clang/lib/Driver/ToolChains/Flang.cpp b/clang/lib/Driver/ToolChains/Flang.cpp
index 8bdd920c3dcbb79..d53bed8e6c1f3b1 100644
--- a/clang/lib/Driver/ToolChains/Flang.cpp
+++ b/clang/lib/Driver/ToolChains/Flang.cpp
@@ -9,6 +9,7 @@
#include "Flang.h"
#include "CommonArgs.h"
+#include "clang/Basic/CodeGenOptions.h"
#include "clang/Driver/Options.h"
#include "llvm/Frontend/Debug/Options.h"
#include "llvm/Support/FileSystem.h"
@@ -606,6 +607,24 @@ void Flang::ConstructJob(Compilation &C, const JobAction &JA,
// Forward -Xflang arguments to -fc1
Args.AddAllArgValues(CmdArgs, options::OPT_Xflang);
+ CodeGenOptions::FramePointerKind FPKeepKind =
+ getFramePointerKind(Args, Triple);
+
+ const char *FPKeepKindStr = nullptr;
+ switch (FPKeepKind) {
+ case CodeGenOptions::FramePointerKind::None:
+ FPKeepKindStr = "-mframe-pointer=none";
+ break;
+ case CodeGenOptions::FramePointerKind::NonLeaf:
+ FPKeepKindStr = "-mframe-pointer=non-leaf";
+ break;
+ case CodeGenOptions::FramePointerKind::All:
+ FPKeepKindStr = "-mframe-pointer=all";
+ break;
+ }
+ assert(FPKeepKindStr && "unknown FramePointerKind");
+ CmdArgs.push_back(FPKeepKindStr);
+
// Forward -mllvm options to the LLVM option parser. In practice, this means
// forwarding to `-fc1` as that's where the LLVM parser is run.
for (const Arg *A : Args.filtered(options::OPT_mllvm)) {
diff --git a/flang/include/flang/Frontend/CodeGenOptions.def b/flang/include/flang/Frontend/CodeGenOptions.def
index 72e7bdab12a14da..d9e6cdfda8598bb 100644
--- a/flang/include/flang/Frontend/CodeGenOptions.def
+++ b/flang/include/flang/Frontend/CodeGenOptions.def
@@ -38,6 +38,7 @@ CODEGENOPT(Underscoring, 1, 1)
ENUM_CODEGENOPT(RelocationModel, llvm::Reloc::Model, 3, llvm::Reloc::PIC_) ///< Name of the relocation model to use.
ENUM_CODEGENOPT(DebugInfo, llvm::codegenoptions::DebugInfoKind, 4, llvm::codegenoptions::NoDebugInfo) ///< Level of debug info to generate
ENUM_CODEGENOPT(VecLib, llvm::driver::VectorLibrary, 3, llvm::driver::VectorLibrary::NoLibrary) ///< Vector functions library to use
+ENUM_CODEGENOPT(FramePointer, FramePointerKind, 2, FramePointerKind::None) /// frame-pointer: all,non-leaf,none
#undef CODEGENOPT
#undef ENUM_CODEGENOPT
diff --git a/flang/include/flang/Frontend/CodeGenOptions.h b/flang/include/flang/Frontend/CodeGenOptions.h
index a3c39bda10667be..9ccd567678be95f 100644
--- a/flang/include/flang/Frontend/CodeGenOptions.h
+++ b/flang/include/flang/Frontend/CodeGenOptions.h
@@ -49,6 +49,29 @@ class CodeGenOptionsBase {
class CodeGenOptions : public CodeGenOptionsBase {
public:
+ //Added
+ ///*
+ enum class FramePointerKind {
+ None, // Omit all frame pointers.
+ NonLeaf, // Keep non-leaf frame pointers.
+ All, // Keep all frame pointers.
+ };
+
+ static llvm::StringRef getFramePointerKindName(FramePointerKind Kind) {
+ switch (Kind) {
+ case FramePointerKind::None:
+ return "none";
+ case FramePointerKind::NonLeaf:
+ return "non-leaf";
+ case FramePointerKind::All:
+ return "all";
+ }
+
+ llvm_unreachable("invalid FramePointerKind");
+ };
+ //
+ //*/
+
/// The paths to the pass plugins that were registered using -fpass-plugin.
std::vector<std::string> LLVMPassPlugins;
diff --git a/flang/include/flang/Tools/CrossToolHelpers.h b/flang/include/flang/Tools/CrossToolHelpers.h
index ddec70fa9824c52..7fc5776a61abc5d 100644
--- a/flang/include/flang/Tools/CrossToolHelpers.h
+++ b/flang/include/flang/Tools/CrossToolHelpers.h
@@ -44,6 +44,8 @@ struct MLIRToLLVMPassPipelineConfig {
bool AliasAnalysis = false; ///< Add TBAA tags to generated LLVMIR
llvm::codegenoptions::DebugInfoKind DebugInfo =
llvm::codegenoptions::NoDebugInfo; ///< Debug info generation.
+ llvm::FramePointerKind FramePointer =
+ llvm::FramePointerKind::None; ///< FramePointerInfo
unsigned VScaleMin = 0; ///< SVE vector range minimum.
unsigned VScaleMax = 0; ///< SVE vector range maximum.
};
diff --git a/flang/lib/Frontend/CompilerInvocation.cpp b/flang/lib/Frontend/CompilerInvocation.cpp
index 334da3ac287e3bf..4340981ae9d642a 100644
--- a/flang/lib/Frontend/CompilerInvocation.cpp
+++ b/flang/lib/Frontend/CompilerInvocation.cpp
@@ -247,6 +247,19 @@ static void parseCodeGenArgs(Fortran::frontend::CodeGenOptions &opts,
clang::driver::options::OPT_fno_alias_analysis,
/*default=*/false);
+ if (const llvm::opt::Arg *a =
+ args.getLastArg(clang::driver::options::OPT_mframe_pointer_EQ)) {
+ llvm::StringRef s = a->getValue();
+ assert(s == "none" || s == "non-leaf"|| s == "all");
+ if (s == "none")
+ opts.setFramePointer(CodeGenOptions::FramePointerKind::None);
+ else
+ if (s == "non-leaf")
+ opts.setFramePointer(CodeGenOptions::FramePointerKind::NonLeaf);
+ else
+ opts.setFramePointer(CodeGenOptions::FramePointerKind::All);
+ }
+
for (auto *a : args.filtered(clang::driver::options::OPT_fpass_plugin_EQ))
opts.LLVMPassPlugins.push_back(a->getValue());
diff --git a/flang/lib/Frontend/FrontendActions.cpp b/flang/lib/Frontend/FrontendActions.cpp
index d7ca7b66584dd52..06273a07e84f2a0 100644
--- a/flang/lib/Frontend/FrontendActions.cpp
+++ b/flang/lib/Frontend/FrontendActions.cpp
@@ -783,6 +783,11 @@ void CodeGenAction::generateLLVMIR() {
llvmModule->setPIELevel(
static_cast<llvm::PIELevel::Level>(opts.PICLevel));
}
+
+ // Set FramePointer LLVM module flag.
+ llvmModule->setFramePointer(
+ static_cast<llvm::FramePointerKind>(opts.getFramePointer()));
+
}
bool CodeGenAction::setUpTargetMachine() {
diff --git a/flang/test/Driver/driver-help-hidden.f90 b/flang/test/Driver/driver-help-hidden.f90
index b276f1906e1a457..57a1710709940f3 100644
--- a/flang/test/Driver/driver-help-hidden.f90
+++ b/flang/test/Driver/driver-help-hidden.f90
@@ -74,6 +74,7 @@
! CHECK-NEXT: -fno-stack-arrays Allocate array temporaries on the heap (default)
! CHECK-NEXT: -fno-version-loops-for-stride
! CHECK-NEXT: Do not create unit-strided loops (default)
+! CHECK-NEXT: -fomit-frame-pointer Omit the frame pointer from functions that don't need it. Some...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/72135
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