[llc] Add -M for InstPrinter options

For many targets, llvm-objdump and llvm-mc
(https://reviews.llvm.org/D103004) support -M no-aliases (e.g.
`RISCVInstPrinter::applyTargetSpecificCLOption`).

This patch implements -M for llc.

While here, rename "DisassemblerOptions" in llvm-mc to the more
appropriate "InstPrinterOptions". For llvm-mc --assemble, there is no
disassembler involved.

Pull Request: https://github.com/llvm/llvm-project/pull/121078

llvm/docs/CommandGuide/llc.rst

@@ -43,6 +43,11 @@ End-user Options
 
  Print a summary of command line options.
 
+.. option:: -M
+
+ Pass target-specific InstPrinter options.
+ Refer to the ``-M`` option of :manpage:`llvm-objdump(1)`.
+
 .. option:: -o <filename>
 
  Use ``<filename>`` as the output filename. See the summary above for more

llvm/include/llvm/MC/MCTargetOptions.h

@@ -105,6 +105,9 @@ public:
   /// integrated assembler.
   std::vector<std::string> IASSearchPaths;
 
+  // InstPrinter options.
+  std::vector<std::string> InstPrinterOptions;
+
   // Whether to emit compact-unwind for non-canonical personality
   // functions on Darwins.
   bool EmitCompactUnwindNonCanonical : 1;

llvm/lib/CodeGen/CodeGenTargetMachineImpl.cpp

@@ -21,6 +21,7 @@
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCCodeEmitter.h"
 #include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCInstPrinter.h"
 #include "llvm/MC/MCInstrInfo.h"
 #include "llvm/MC/MCObjectWriter.h"
 #include "llvm/MC/MCRegisterInfo.h"
@@ -132,8 +133,10 @@ bool CodeGenTargetMachineImpl::addAsmPrinter(PassManagerBase &PM,
                                              MCContext &Context) {
   Expected<std::unique_ptr<MCStreamer>> MCStreamerOrErr =
       createMCStreamer(Out, DwoOut, FileType, Context);
-  if (auto Err = MCStreamerOrErr.takeError())
+  if (!MCStreamerOrErr) {
+    Context.reportError(SMLoc(), toString(MCStreamerOrErr.takeError()));
     return true;
+  }
 
   // Create the AsmPrinter, which takes ownership of AsmStreamer if successful.
   FunctionPass *Printer =
@@ -163,6 +166,9 @@ CodeGenTargetMachineImpl::createMCStreamer(raw_pwrite_stream &Out,
         getTargetTriple(),
         Options.MCOptions.OutputAsmVariant.value_or(MAI.getAssemblerDialect()),
         MAI, MII, MRI);
+    for (StringRef Opt : Options.MCOptions.InstPrinterOptions)
+      if (!InstPrinter->applyTargetSpecificCLOption(Opt))
+        return createStringError("invalid InstPrinter option '" + Opt + "'");
 
     // Create a code emitter if asked to show the encoding.
     std::unique_ptr<MCCodeEmitter> MCE;

llvm/test/CodeGen/RISCV/compress-opt-select.ll

@@ -1,9 +1,9 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
 ; RUN: llc -mtriple=riscv32 -target-abi ilp32d -mattr=+c,+f,+d \
-; RUN:     -riscv-no-aliases < %s \
+; RUN:     -M no-aliases < %s \
 ; RUN:   | FileCheck -check-prefix=RV32IFDC %s
 ; RUN: llc -mtriple=riscv32 -target-abi ilp32d -mattr=-c,+f,+d \
-; RUN:     -riscv-no-aliases < %s \
+; RUN:     -M no-aliases < %s \
 ; RUN:   | FileCheck -check-prefix=RV32IFD %s
 
 ; constant is small and fit in 6 bit (compress imm)

llvm/test/CodeGen/RISCV/hwasan-check-memaccess.ll

@@ -1,7 +1,7 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
 ; RUN: llc -mtriple=riscv64 < %s | FileCheck %s
 ; RUN: llc -mtriple=riscv64 --relocation-model=pic < %s | FileCheck %s
-; RUN: llc -mtriple=riscv64 -mattr=+c --riscv-no-aliases < %s \
+; RUN: llc -mtriple=riscv64 -mattr=+c -M no-aliases < %s \
 ; RUN:   | FileCheck %s --check-prefix=COMPRESS
 
 define ptr @f2(ptr %x0, ptr %x1) {

llvm/test/tools/llc/instprinter-options.ll

@@ -0,0 +1,4 @@
+; REQUIRES: x86-registered-target
+; RUN: not llc -mtriple=x86_64 < %s -M invalid 2>&1 | FileCheck %s --implicit-check-not=error:
+
+; CHECK: error: invalid InstPrinter option 'invalid'

llvm/test/tools/llvm-mc/disassembler-options.test

@@ -1,4 +1,4 @@
 # RUN: export LSAN_OPTIONS=detect_leaks=0
 # RUN: not llvm-mc -M invalid /dev/null 2>&1 | FileCheck %s
 
-# CHECK: error: invalid disassembler option 'invalid'
+# CHECK: error: invalid InstPrinter option 'invalid'

llvm/tools/llc/llc.cpp

@@ -69,6 +69,9 @@ static codegen::RegisterCodeGenFlags CGF;
 static cl::opt<std::string>
 InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
 
+static cl::list<std::string>
+    InstPrinterOptions("M", cl::desc("InstPrinter options"));
+
 static cl::opt<std::string>
 InputLanguage("x", cl::desc("Input language ('ir' or 'mir')"));
 
@@ -498,6 +501,7 @@ static int compileModule(char **argv, LLVMContext &Context) {
     Options.MCOptions.AsmVerbose = AsmVerbose;
     Options.MCOptions.PreserveAsmComments = PreserveComments;
     Options.MCOptions.IASSearchPaths = IncludeDirs;
+    Options.MCOptions.InstPrinterOptions = InstPrinterOptions;
     Options.MCOptions.SplitDwarfFile = SplitDwarfFile;
     if (DwarfDirectory.getPosition()) {
       Options.MCOptions.MCUseDwarfDirectory =
@@ -674,6 +678,17 @@ static int compileModule(char **argv, LLVMContext &Context) {
     MachineModuleInfoWrapperPass *MMIWP =
         new MachineModuleInfoWrapperPass(Target.get());
 
+    // Set a temporary diagnostic handler. This is used before
+    // MachineModuleInfoWrapperPass::doInitialization for features like -M.
+    bool HasMCErrors = false;
+    MCContext &MCCtx = MMIWP->getMMI().getContext();
+    MCCtx.setDiagnosticHandler([&](const SMDiagnostic &SMD, bool IsInlineAsm,
+                                   const SourceMgr &SrcMgr,
+                                   std::vector<const MDNode *> &LocInfos) {
+      WithColor::error(errs(), argv0) << SMD.getMessage() << '\n';
+      HasMCErrors = true;
+    });
+
     // Construct a custom pass pipeline that starts after instruction
     // selection.
     if (!getRunPassNames().empty()) {
@@ -708,7 +723,8 @@ static int compileModule(char **argv, LLVMContext &Context) {
     } else if (Target->addPassesToEmitFile(
                    PM, *OS, DwoOut ? &DwoOut->os() : nullptr,
                    codegen::getFileType(), NoVerify, MMIWP)) {
-      reportError("target does not support generation of this file type");
+      if (!HasMCErrors)
+        reportError("target does not support generation of this file type");
     }
 
     const_cast<TargetLoweringObjectFile *>(Target->getObjFileLowering())
@@ -736,7 +752,7 @@ static int compileModule(char **argv, LLVMContext &Context) {
 
     PM.run(*M);
 
-    if (Context.getDiagHandlerPtr()->HasErrors)
+    if (Context.getDiagHandlerPtr()->HasErrors || HasMCErrors)
       return 1;
 
     // Compare the two outputs and make sure they're the same

llvm/tools/llvm-mc/llvm-mc.cpp

@@ -49,9 +49,9 @@ static cl::opt<std::string> InputFilename(cl::Positional,
                                           cl::desc("<input file>"),
                                           cl::init("-"), cl::cat(MCCategory));
 
-static cl::list<std::string>
-    DisassemblerOptions("M", cl::desc("Disassembler options"),
-                        cl::cat(MCCategory));
+static cl::list<std::string> InstPrinterOptions("M",
+                                                cl::desc("InstPrinter options"),
+                                                cl::cat(MCCategory));
 
 static cl::opt<std::string> OutputFilename("o", cl::desc("Output filename"),
                                            cl::value_desc("filename"),
@@ -369,6 +369,7 @@ int main(int argc, char **argv) {
   MCOptions.ShowMCInst = ShowInst;
   MCOptions.AsmVerbose = true;
   MCOptions.MCUseDwarfDirectory = MCTargetOptions::EnableDwarfDirectory;
+  MCOptions.InstPrinterOptions = InstPrinterOptions;
 
   setDwarfDebugFlags(argc, argv);
   setDwarfDebugProducer();
@@ -531,9 +532,9 @@ int main(int argc, char **argv) {
       return 1;
     }
 
-    for (StringRef Opt : DisassemblerOptions)
+    for (StringRef Opt : InstPrinterOptions)
       if (!IP->applyTargetSpecificCLOption(Opt)) {
-        WithColor::error() << "invalid disassembler option '" << Opt << "'\n";
+        WithColor::error() << "invalid InstPrinter option '" << Opt << "'\n";
         return 1;
       }