r276907 - Add flags to toggle preservation of assembly comments

[Nirav Dave via cfe-commits]

Author: niravd
Date: Wed Jul 27 14:57:40 2016
New Revision: 276907

URL: http://llvm.org/viewvc/llvm-project?rev=276907&view=rev
Log:
Add flags to toggle preservation of assembly comments

Summary: Add -fpreserve-as-comments and -fno-preserve-as-comments.

Reviewers: echristo, rnk

Subscribers: mehdi_amini, llvm-commits

Differential Revision: https://reviews.llvm.org/D22883

Added:
    cfe/trunk/test/CodeGen/preserve-as-comments.c
Modified:
    cfe/trunk/include/clang/Driver/Options.td
    cfe/trunk/include/clang/Frontend/CodeGenOptions.def
    cfe/trunk/lib/CodeGen/BackendUtil.cpp
    cfe/trunk/lib/Driver/Tools.cpp
    cfe/trunk/lib/Frontend/CompilerInvocation.cpp

Modified: cfe/trunk/include/clang/Driver/Options.td
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/Options.td?rev=276907&r1=276906&r2=276907&view=diff
==============================================================================
--- cfe/trunk/include/clang/Driver/Options.td (original)
+++ cfe/trunk/include/clang/Driver/Options.td Wed Jul 27 14:57:40 2016
@@ -1089,6 +1089,9 @@ def fpie : Flag<["-"], "fpie">, Group<f_
 def fno_pie : Flag<["-"], "fno-pie">, Group<f_Group>;
 def fplugin_EQ : Joined<["-"], "fplugin=">, Group<f_Group>, Flags<[DriverOption]>, MetaVarName<"<dsopath>">,
   HelpText<"Load the named plugin (dynamic shared object)">;
+def fpreserve_as_comments : Flag<["-"], "fpreserve-as-comments">, Group<f_Group>;
+def fno_preserve_as_comments : Flag<["-"], "fno-preserve-as-comments">, Group<f_Group>, Flags<[CC1Option]>,
+  HelpText<"Do not preserve comments in inline assembly">;
 def fprofile_arcs : Flag<["-"], "fprofile-arcs">, Group<f_Group>;
 def fno_profile_arcs : Flag<["-"], "fno-profile-arcs">, Group<f_Group>;
 def framework : Separate<["-"], "framework">, Flags<[LinkerInput]>;

Modified: cfe/trunk/include/clang/Frontend/CodeGenOptions.def
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Frontend/CodeGenOptions.def?rev=276907&r1=276906&r2=276907&view=diff
==============================================================================
--- cfe/trunk/include/clang/Frontend/CodeGenOptions.def (original)
+++ cfe/trunk/include/clang/Frontend/CodeGenOptions.def Wed Jul 27 14:57:40 2016
@@ -32,6 +32,7 @@ CODEGENOPT(DisableIntegratedAS, 1, 0) //
 CODEGENOPT(CompressDebugSections, 1, 0) ///< -Wa,-compress-debug-sections
 CODEGENOPT(RelaxELFRelocations, 1, 0) ///< -Wa,--mrelax-relocations
 CODEGENOPT(AsmVerbose        , 1, 0) ///< -dA, -fverbose-asm.
+CODEGENOPT(PreserveAsmComments, 1, 1) ///< -dA, -fno-preserve-as-comments.
 CODEGENOPT(AssumeSaneOperatorNew , 1, 1) ///< implicit __attribute__((malloc)) operator new
 CODEGENOPT(Autolink          , 1, 1) ///< -fno-autolink
 CODEGENOPT(ObjCAutoRefCountExceptions , 1, 0) ///< Whether ARC should be EH-safe.

Modified: cfe/trunk/lib/CodeGen/BackendUtil.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/BackendUtil.cpp?rev=276907&r1=276906&r2=276907&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/BackendUtil.cpp (original)
+++ cfe/trunk/lib/CodeGen/BackendUtil.cpp Wed Jul 27 14:57:40 2016
@@ -604,6 +604,7 @@ void EmitAssemblyHelper::CreateTargetMac
       CodeGenOpts.IncrementalLinkerCompatible;
   Options.MCOptions.MCFatalWarnings = CodeGenOpts.FatalWarnings;
   Options.MCOptions.AsmVerbose = CodeGenOpts.AsmVerbose;
+  Options.MCOptions.PreserveAsmComments = CodeGenOpts.PreserveAsmComments;
   Options.MCOptions.ABIName = TargetOpts.ABI;
 
   TM.reset(TheTarget->createTargetMachine(Triple, TargetOpts.CPU, FeaturesStr,

Modified: cfe/trunk/lib/Driver/Tools.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Tools.cpp?rev=276907&r1=276906&r2=276907&view=diff
==============================================================================
--- cfe/trunk/lib/Driver/Tools.cpp (original)
+++ cfe/trunk/lib/Driver/Tools.cpp Wed Jul 27 14:57:40 2016
@@ -4193,6 +4193,10 @@ void Clang::ConstructJob(Compilation &C,
                     true))
     CmdArgs.push_back("-fno-jump-tables");
 
+  if (!Args.hasFlag(options::OPT_fpreserve_as_comments,
+                    options::OPT_fno_preserve_as_comments, true))
+    CmdArgs.push_back("-fno-preserve-as-comments");
+
   if (Arg *A = Args.getLastArg(options::OPT_mregparm_EQ)) {
     CmdArgs.push_back("-mregparm");
     CmdArgs.push_back(A->getValue());

Modified: cfe/trunk/lib/Frontend/CompilerInvocation.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/CompilerInvocation.cpp?rev=276907&r1=276906&r2=276907&view=diff
==============================================================================
--- cfe/trunk/lib/Frontend/CompilerInvocation.cpp (original)
+++ cfe/trunk/lib/Frontend/CompilerInvocation.cpp Wed Jul 27 14:57:40 2016
@@ -544,6 +544,7 @@ static bool ParseCodeGenArgs(CodeGenOpti
       Args.hasFlag(OPT_fcoverage_mapping, OPT_fno_coverage_mapping, false);
   Opts.DumpCoverageMapping = Args.hasArg(OPT_dump_coverage_mapping);
   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
+  Opts.PreserveAsmComments = !Args.hasArg(OPT_fno_preserve_as_comments);
   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
   Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);

Added: cfe/trunk/test/CodeGen/preserve-as-comments.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/preserve-as-comments.c?rev=276907&view=auto
==============================================================================
--- cfe/trunk/test/CodeGen/preserve-as-comments.c (added)
+++ cfe/trunk/test/CodeGen/preserve-as-comments.c Wed Jul 27 14:57:40 2016
@@ -0,0 +1,12 @@
+// RUN: %clang_cc1 -S -fno-preserve-as-comments %s -o - | FileCheck %s --check-prefix=NOASM --check-prefix=CHECK
+// RUN: %clang_cc1 -S %s -o - | FileCheck %s --check-prefix=ASM --check-prefix=CHECK
+
+// CHECK-LABEL: main
+// CHECK: #APP
+// ASM: #comment
+// NOASM-NOT: #comment
+// CHECK: #NO_APP
+int main() {
+  __asm__("/*comment*/");
+  return 0;
+}