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[MC] Introduce ability to add target specific AsmStreamer #107415

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[MC] Introduce ability to add target specific AsmStreamer #107415

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12 changes: 12 additions & 0 deletions llvm/include/llvm/MC/TargetRegistry.h
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Original file line number Diff line number Diff line change
Expand Up @@ -208,6 +208,10 @@ class Target {
using AsmTargetStreamerCtorTy =
MCTargetStreamer *(*)(MCStreamer &S, formatted_raw_ostream &OS,
MCInstPrinter *InstPrint);
using AsmStreamerCtorTy =
MCStreamer *(*)(MCContext &Ctx, std::unique_ptr<formatted_raw_ostream> OS,
MCInstPrinter *IP, std::unique_ptr<MCCodeEmitter> CE,
std::unique_ptr<MCAsmBackend> TAB);
using ObjectTargetStreamerCtorTy = MCTargetStreamer *(*)(
MCStreamer &S, const MCSubtargetInfo &STI);
using MCRelocationInfoCtorTy = MCRelocationInfo *(*)(const Triple &TT,
Expand Down Expand Up @@ -316,6 +320,10 @@ class Target {
/// registered (default = nullptr).
AsmTargetStreamerCtorTy AsmTargetStreamerCtorFn = nullptr;

/// Construction function for this target's AsmStreamer, if
/// registered (default = nullptr).
AsmStreamerCtorTy AsmStreamerCtorFn = nullptr;

/// Construction function for this target's obj TargetStreamer, if
/// registered (default = nullptr).
ObjectTargetStreamerCtorTy ObjectTargetStreamerCtorFn = nullptr;
Expand Down Expand Up @@ -927,6 +935,10 @@ struct TargetRegistry {
T.NullTargetStreamerCtorFn = Fn;
}

static void RegisterAsmStreamer(Target &T, Target::AsmStreamerCtorTy Fn) {
T.AsmStreamerCtorFn = Fn;
}

static void RegisterAsmTargetStreamer(Target &T,
Target::AsmTargetStreamerCtorTy Fn) {
T.AsmTargetStreamerCtorFn = Fn;
Expand Down
10 changes: 8 additions & 2 deletions llvm/lib/MC/TargetRegistry.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -93,8 +93,14 @@ MCStreamer *Target::createAsmStreamer(MCContext &Ctx,
std::unique_ptr<MCCodeEmitter> CE,
std::unique_ptr<MCAsmBackend> TAB) const {
formatted_raw_ostream &OSRef = *OS;
MCStreamer *S = llvm::createAsmStreamer(Ctx, std::move(OS), IP,
std::move(CE), std::move(TAB));
MCStreamer *S;
if (AsmStreamerCtorFn)
S = AsmStreamerCtorFn(Ctx, std::move(OS), IP, std::move(CE),
std::move(TAB));
else
S = llvm::createAsmStreamer(Ctx, std::move(OS), IP, std::move(CE),
std::move(TAB));

createAsmTargetStreamer(*S, OSRef, IP);
return S;
}
Expand Down