[mips] Add MipsOptionRecord abstraction and use it to implement .reginfo/.MIPS.options
This abstraction allows us to support the various records that can be placed in
the .MIPS.options section in the future. We currently use it to record register
usage information (the ODK_REGINFO record in our ELF64 spec).
Each .MIPS.options record should subclass MipsOptionRecord and provide an
implementation of EmitMipsOptionRecord.
Patch by Matheus Almeida and Toma Tabacu
llvm-svn: 213522
diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsTargetStreamer.cpp b/llvm/lib/Target/Mips/MCTargetDesc/MipsTargetStreamer.cpp
index 4e72169..4a178e2 100644
--- a/llvm/lib/Target/Mips/MCTargetDesc/MipsTargetStreamer.cpp
+++ b/llvm/lib/Target/Mips/MCTargetDesc/MipsTargetStreamer.cpp
@@ -12,6 +12,7 @@
//===----------------------------------------------------------------------===//
#include "InstPrinter/MipsInstPrinter.h"
+#include "MipsELFStreamer.h"
#include "MipsMCTargetDesc.h"
#include "MipsTargetObjectFile.h"
#include "MipsTargetStreamer.h"
@@ -323,11 +324,7 @@
void MipsTargetELFStreamer::finish() {
MCAssembler &MCA = getStreamer().getAssembler();
- MCContext &Context = MCA.getContext();
- MCStreamer &OS = getStreamer();
- const MCObjectFileInfo &OFI = *Context.getObjectFileInfo();
- Triple T(STI.getTargetTriple());
- uint64_t Features = STI.getFeatureBits();
+ const MCObjectFileInfo &OFI = *MCA.getContext().getObjectFileInfo();
// .bss, .text and .data are always at least 16-byte aligned.
MCSectionData &TextSectionData =
@@ -341,42 +338,12 @@
DataSectionData.setAlignment(std::max(16u, DataSectionData.getAlignment()));
BSSSectionData.setAlignment(std::max(16u, BSSSectionData.getAlignment()));
- if (T.isArch64Bit() && (Features & Mips::FeatureN64)) {
- // The EntrySize value of 1 seems strange since the records are neither
- // 1-byte long nor fixed length but it matches the value GAS emits.
- const MCSectionELF *Sec =
- Context.getELFSection(".MIPS.options", ELF::SHT_MIPS_OPTIONS,
- ELF::SHF_ALLOC | ELF::SHF_MIPS_NOSTRIP,
- SectionKind::getMetadata(), 1, "");
- MCA.getOrCreateSectionData(*Sec).setAlignment(8);
- OS.SwitchSection(Sec);
+ // Emit all the option records.
+ // At the moment we are only emitting .Mips.options (ODK_REGINFO) and
+ // .reginfo.
+ MipsELFStreamer &MEF = static_cast<MipsELFStreamer &>(Streamer);
+ MEF.EmitMipsOptionRecords();
- OS.EmitIntValue(1, 1); // kind
- OS.EmitIntValue(40, 1); // size
- OS.EmitIntValue(0, 2); // section
- OS.EmitIntValue(0, 4); // info
- OS.EmitIntValue(0, 4); // ri_gprmask
- OS.EmitIntValue(0, 4); // pad
- OS.EmitIntValue(0, 4); // ri_cpr[0]mask
- OS.EmitIntValue(0, 4); // ri_cpr[1]mask
- OS.EmitIntValue(0, 4); // ri_cpr[2]mask
- OS.EmitIntValue(0, 4); // ri_cpr[3]mask
- OS.EmitIntValue(0, 8); // ri_gp_value
- } else {
- const MCSectionELF *Sec =
- Context.getELFSection(".reginfo", ELF::SHT_MIPS_REGINFO, ELF::SHF_ALLOC,
- SectionKind::getMetadata(), 24, "");
- MCA.getOrCreateSectionData(*Sec)
- .setAlignment(Features & Mips::FeatureN32 ? 8 : 4);
- OS.SwitchSection(Sec);
-
- OS.EmitIntValue(0, 4); // ri_gprmask
- OS.EmitIntValue(0, 4); // ri_cpr[0]mask
- OS.EmitIntValue(0, 4); // ri_cpr[1]mask
- OS.EmitIntValue(0, 4); // ri_cpr[2]mask
- OS.EmitIntValue(0, 4); // ri_cpr[3]mask
- OS.EmitIntValue(0, 4); // ri_gp_value
- }
emitMipsAbiFlags();
}