[PATCH] D155716: [clang][CodeGen] Introduce `-frecord-command-line` for MachO

[Antonio Frighetto via Phabricator via llvm-commits]

antoniofrighetto created this revision.
antoniofrighetto added reviewers: davide, ab, scott.linder.
Herald added a subscriber: hiraditya.
Herald added a project: All.
antoniofrighetto requested review of this revision.
Herald added subscribers: llvm-commits, cfe-commits, MaskRay.
Herald added projects: clang, LLVM.

Allow clang driver command-line recording when targeting MachO object files as well.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D155716

Files:
  clang/lib/Driver/ToolChains/Clang.cpp
  llvm/include/llvm/CodeGen/TargetLoweringObjectFileImpl.h
  llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
  llvm/test/CodeGen/AArch64/arm64-command-line-metadata.ll


Index: llvm/test/CodeGen/AArch64/arm64-command-line-metadata.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/AArch64/arm64-command-line-metadata.ll
@@ -0,0 +1,15 @@
+; RUN: llc -mtriple=aarch64-apple-darwin < %s | FileCheck %s
+; Verify that llvm.commandline metadata is emitted to a
+; MachO section named __command_line within __TEXT segment.
+
+; CHECK:        .section	__TEXT,__text,regular,pure_instructions
+; CHECK-NEXT:   .section	__TEXT,__command_line
+; CHECK-NEXT:   .space	1
+; CHECK-NEXT:   .ascii	"clang -command1"
+; CHECK-NEXT:   .space	1
+; CHECK-NEXT:   .ascii	"clang -command2"
+; CHECK-NEXT:   .space	1
+
+!llvm.commandline = !{!0, !1}
+!0 = !{!"clang -command1"}
+!1 = !{!"clang -command2"}
Index: llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
===================================================================
--- llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
+++ llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
@@ -1420,6 +1420,11 @@
   return ReadOnlySection;  // .const
 }
 
+MCSection *TargetLoweringObjectFileMachO::getSectionForCommandLines() const {
+  return getContext().getMachOSection("__TEXT", "__command_line", 0,
+                                      SectionKind::getReadOnly());
+}
+
 const MCExpr *TargetLoweringObjectFileMachO::getTTypeGlobalReference(
     const GlobalValue *GV, unsigned Encoding, const TargetMachine &TM,
     MachineModuleInfo *MMI, MCStreamer &Streamer) const {
Index: llvm/include/llvm/CodeGen/TargetLoweringObjectFileImpl.h
===================================================================
--- llvm/include/llvm/CodeGen/TargetLoweringObjectFileImpl.h
+++ llvm/include/llvm/CodeGen/TargetLoweringObjectFileImpl.h
@@ -156,6 +156,8 @@
 
   void getNameWithPrefix(SmallVectorImpl<char> &OutName, const GlobalValue *GV,
                          const TargetMachine &TM) const override;
+
+  MCSection *getSectionForCommandLines() const override;
 };
 
 class TargetLoweringObjectFileCOFF : public TargetLoweringObjectFile {
Index: clang/lib/Driver/ToolChains/Clang.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Clang.cpp
+++ clang/lib/Driver/ToolChains/Clang.cpp
@@ -7179,7 +7179,7 @@
       Args.hasFlag(options::OPT_frecord_command_line,
                    options::OPT_fno_record_command_line, false);
   if (FRecordSwitches && !Triple.isOSBinFormatELF() &&
-      !Triple.isOSBinFormatXCOFF())
+      !Triple.isOSBinFormatXCOFF() && !Triple.isOSBinFormatMachO())
     D.Diag(diag::err_drv_unsupported_opt_for_target)
         << Args.getLastArg(options::OPT_frecord_command_line)->getAsString(Args)
         << TripleStr;


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