https://github.com/tblah created
https://github.com/llvm/llvm-project/pull/130788
This flag provides extra commentary in the assembly output. It is in
CodeGenOptions to match what is done in clang, even though the backend treats
it as a target option.
>From 5d3c1cc1d40b308b93cc47c78c6c3ca677f55155 Mon Sep 17 00:00:00 2001
From: Tom Eccles <tom.ecc...@arm.com>
Date: Tue, 11 Mar 2025 15:54:35 +0000
Subject: [PATCH] [flang] Add support for -f[no-]verbose-asm
This flag provides extra commentary in the assembly output. It is in
CodeGenOptions to match what is done in clang, even though the backend
treats it as a target option.
---
clang/include/clang/Driver/Options.td | 5 +++--
clang/lib/Driver/ToolChains/Flang.cpp | 3 ++-
flang/include/flang/Frontend/CodeGenOptions.def | 2 ++
flang/lib/Frontend/CompilerInvocation.cpp | 4 ++++
flang/lib/Frontend/FrontendActions.cpp | 2 ++
flang/test/Driver/verbose-asm.f90 | 16 ++++++++++++++++
6 files changed, 29 insertions(+), 3 deletions(-)
create mode 100644 flang/test/Driver/verbose-asm.f90
diff --git a/clang/include/clang/Driver/Options.td
b/clang/include/clang/Driver/Options.td
index e69cd6b833c3a..ac6392f92f311 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -3467,7 +3467,7 @@ defm use_cxa_atexit : BoolFOption<"use-cxa-atexit",
PosFlag<SetTrue>>;
def fno_unwind_tables : Flag<["-"], "fno-unwind-tables">, Group<f_Group>;
def fno_verbose_asm : Flag<["-"], "fno-verbose-asm">, Group<f_Group>,
- Visibility<[ClangOption, CC1Option]>,
+ Visibility<[ClangOption, CC1Option, FlangOption, FC1Option]>,
MarshallingInfoNegativeFlag<CodeGenOpts<"AsmVerbose">>;
def fno_working_directory : Flag<["-"], "fno-working-directory">,
Group<f_Group>;
def fobjc_arc : Flag<["-"], "fobjc-arc">, Group<f_Group>,
@@ -4142,7 +4142,8 @@ defm use_init_array : BoolFOption<"use-init-array",
PosFlag<SetTrue>>;
def fno_var_tracking : Flag<["-"], "fno-var-tracking">,
Group<clang_ignored_f_Group>;
def fverbose_asm : Flag<["-"], "fverbose-asm">, Group<f_Group>,
- HelpText<"Generate verbose assembly output">;
+ HelpText<"Generate verbose assembly output">,
+ Visibility<[ClangOption, CC1Option, FlangOption, FC1Option]>;
def dA : Flag<["-"], "dA">, Alias<fverbose_asm>;
defm visibility_from_dllstorageclass :
BoolFOption<"visibility-from-dllstorageclass",
LangOpts<"VisibilityFromDLLStorageClass">, DefaultFalse,
diff --git a/clang/lib/Driver/ToolChains/Flang.cpp
b/clang/lib/Driver/ToolChains/Flang.cpp
index d4fea633d0edf..09b77b4aab03d 100644
--- a/clang/lib/Driver/ToolChains/Flang.cpp
+++ b/clang/lib/Driver/ToolChains/Flang.cpp
@@ -172,7 +172,8 @@ void Flang::addCodegenOptions(const ArgList &Args,
options::OPT_finit_global_zero,
options::OPT_fno_init_global_zero,
options::OPT_ftime_report,
options::OPT_ftime_report_EQ, options::OPT_funroll_loops,
- options::OPT_fno_unroll_loops});
+ options::OPT_fno_unroll_loops, options::OPT_fverbose_asm,
+ options::OPT_fno_verbose_asm});
}
void Flang::addPicOptions(const ArgList &Args, ArgStringList &CmdArgs) const {
diff --git a/flang/include/flang/Frontend/CodeGenOptions.def
b/flang/include/flang/Frontend/CodeGenOptions.def
index 44cb5a2cdd497..d2ff06d5fe08a 100644
--- a/flang/include/flang/Frontend/CodeGenOptions.def
+++ b/flang/include/flang/Frontend/CodeGenOptions.def
@@ -42,5 +42,7 @@ ENUM_CODEGENOPT(DebugInfo,
llvm::codegenoptions::DebugInfoKind, 4, llvm::codeg
ENUM_CODEGENOPT(VecLib, llvm::driver::VectorLibrary, 3,
llvm::driver::VectorLibrary::NoLibrary) ///< Vector functions library to use
ENUM_CODEGENOPT(FramePointer, llvm::FramePointerKind, 2,
llvm::FramePointerKind::None) ///< Enable the usage of frame pointers
+CODEGENOPT(AsmVerbose, 1, 0)
+
#undef CODEGENOPT
#undef ENUM_CODEGENOPT
diff --git a/flang/lib/Frontend/CompilerInvocation.cpp
b/flang/lib/Frontend/CompilerInvocation.cpp
index 8b07a50824899..5451006960e8b 100644
--- a/flang/lib/Frontend/CompilerInvocation.cpp
+++ b/flang/lib/Frontend/CompilerInvocation.cpp
@@ -254,6 +254,10 @@ static void
parseCodeGenArgs(Fortran::frontend::CodeGenOptions &opts,
clang::driver::options::OPT_fno_unroll_loops,
(opts.OptimizationLevel > 1));
+ if (args.hasFlag(clang::driver::options::OPT_fverbose_asm,
+ clang::driver::options::OPT_fno_verbose_asm, false))
+ opts.AsmVerbose = 1;
+
opts.AliasAnalysis = opts.OptimizationLevel > 0;
// -mframe-pointer=none/non-leaf/all option.
diff --git a/flang/lib/Frontend/FrontendActions.cpp
b/flang/lib/Frontend/FrontendActions.cpp
index 94de376aaf7d6..0ef2708bb42fb 100644
--- a/flang/lib/Frontend/FrontendActions.cpp
+++ b/flang/lib/Frontend/FrontendActions.cpp
@@ -1284,6 +1284,8 @@ void CodeGenAction::executeAction() {
// given on the command-line).
llvm::TargetMachine &targetMachine = ci.getTargetMachine();
+ targetMachine.Options.MCOptions.AsmVerbose = codeGenOpts.AsmVerbose;
+
const llvm::Triple &theTriple = targetMachine.getTargetTriple();
if (llvmModule->getTargetTriple() != theTriple) {
diff --git a/flang/test/Driver/verbose-asm.f90
b/flang/test/Driver/verbose-asm.f90
new file mode 100644
index 0000000000000..20e930d22bf0a
--- /dev/null
+++ b/flang/test/Driver/verbose-asm.f90
@@ -0,0 +1,16 @@
+! RUN: %flang -### -S -o - -fverbose-asm %s 2>&1 | FileCheck %s
--check-prefix=FORWARDING
+! FORWARDING: -fverbose-asm
+
+! RUN: %flang -S -o - -fverbose-asm %s | FileCheck %s --check-prefix=VERBOSE
+! RUN: %flang_fc1 -S -o - -fverbose-asm %s | FileCheck %s
--check-prefix=VERBOSE
+
+! RUN: %flang -S -o - %s | FileCheck %s --check-prefix=QUIET
+! RUN: %flang_fc1 -S -o - %s | FileCheck %s --check-prefix=QUIET
+! RUN: %flang -S -o - -fverbose-asm -fno-verbose-asm %s | FileCheck %s
--check-prefix=QUIET
+! RUN: %flang_fc1 -S -o - -fverbose-asm -fno-verbose-asm %s | FileCheck %s
--check-prefix=QUIET
+
+! VERBOSE: // -- Begin function _QQmain
+! QUIET-NOT: // -- Begin function _QQmain
+program test
+
+end program
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