2007-06-25 23:11:25 +08:00
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//===-- X86ATTAsmPrinter.cpp - Convert X86 LLVM code to AT&T assembly -----===//
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2005-07-02 06:44:09 +08:00
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains a printer that converts from our internal representation
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// of machine-dependent LLVM code to AT&T format assembly
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// language. This printer is the output mechanism used by `llc'.
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//
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//===----------------------------------------------------------------------===//
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2006-12-20 06:59:26 +08:00
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#define DEBUG_TYPE "asm-printer"
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2005-07-02 06:44:09 +08:00
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#include "X86ATTAsmPrinter.h"
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#include "X86.h"
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2007-01-17 00:41:57 +08:00
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#include "X86COFF.h"
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2006-09-21 06:03:51 +08:00
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#include "X86MachineFunctionInfo.h"
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2005-07-02 06:44:09 +08:00
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#include "X86TargetMachine.h"
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2006-09-08 06:06:40 +08:00
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#include "X86TargetAsmInfo.h"
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2007-01-13 03:20:47 +08:00
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#include "llvm/ADT/StringExtras.h"
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2006-09-21 06:03:51 +08:00
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#include "llvm/CallingConv.h"
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2005-07-02 06:44:09 +08:00
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#include "llvm/Module.h"
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#include "llvm/Support/Mangler.h"
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2006-09-08 06:06:40 +08:00
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#include "llvm/Target/TargetAsmInfo.h"
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2006-02-18 08:15:05 +08:00
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#include "llvm/Target/TargetOptions.h"
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2006-12-20 06:59:26 +08:00
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#include "llvm/ADT/Statistic.h"
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2005-07-02 06:44:09 +08:00
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using namespace llvm;
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2006-12-20 06:59:26 +08:00
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STATISTIC(EmittedInsts, "Number of machine instrs printed");
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2007-10-14 13:57:21 +08:00
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static std::string computePICLabel(unsigned FnNum,
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2007-01-18 09:49:58 +08:00
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const TargetAsmInfo *TAI,
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const X86Subtarget* Subtarget) {
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2007-01-13 03:20:47 +08:00
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std::string label;
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2007-01-18 09:49:58 +08:00
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if (Subtarget->isTargetDarwin())
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2007-10-14 13:57:21 +08:00
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label = "\"L" + utostr_32(FnNum) + "$pb\"";
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2007-01-18 09:49:58 +08:00
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else if (Subtarget->isTargetELF())
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2007-10-14 13:57:21 +08:00
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label = ".Lllvm$" + utostr_32(FnNum) + "$piclabel";
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2007-01-18 09:49:58 +08:00
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else
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2007-01-13 03:20:47 +08:00
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assert(0 && "Don't know how to print PIC label!\n");
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return label;
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}
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2006-10-05 10:43:52 +08:00
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/// getSectionForFunction - Return the section that we should emit the
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/// specified function body into.
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std::string X86ATTAsmPrinter::getSectionForFunction(const Function &F) const {
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switch (F.getLinkage()) {
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default: assert(0 && "Unknown linkage type!");
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case Function::InternalLinkage:
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case Function::DLLExportLinkage:
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case Function::ExternalLinkage:
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return TAI->getTextSection();
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case Function::WeakLinkage:
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case Function::LinkOnceLinkage:
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if (Subtarget->isTargetDarwin()) {
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return ".section __TEXT,__textcoal_nt,coalesced,pure_instructions";
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2007-01-03 19:43:14 +08:00
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} else if (Subtarget->isTargetCygMing()) {
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2007-06-14 23:00:27 +08:00
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return "\t.section\t.text$linkonce." + CurrentFnName + ",\"ax\"";
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2006-10-05 10:43:52 +08:00
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} else {
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return "\t.section\t.llvm.linkonce.t." + CurrentFnName +
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2007-06-14 23:00:27 +08:00
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",\"ax\",@progbits";
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2006-10-05 10:43:52 +08:00
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}
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}
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}
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2005-07-02 06:44:09 +08:00
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/// runOnMachineFunction - This uses the printMachineInstruction()
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/// method to print assembly for each instruction.
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///
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bool X86ATTAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
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2007-05-05 17:04:50 +08:00
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if (TAI->doesSupportDebugInformation()) {
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2006-07-19 19:54:50 +08:00
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// Let PassManager know we need debug information and relay
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2007-01-27 05:22:28 +08:00
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// the MachineModuleInfo address on to DwarfWriter.
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2007-09-11 16:27:17 +08:00
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MMI = &getAnalysis<MachineModuleInfo>();
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DW.SetModuleInfo(MMI);
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2006-07-19 19:54:50 +08:00
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}
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2006-03-07 10:02:57 +08:00
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2005-11-21 15:51:23 +08:00
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SetupMachineFunction(MF);
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2005-07-02 06:44:09 +08:00
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O << "\n\n";
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// Print out constants referenced by the function
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2005-11-21 16:32:23 +08:00
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EmitConstantPool(MF.getConstantPool());
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2005-07-02 06:44:09 +08:00
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// Print out labels for the function.
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2006-02-07 16:38:37 +08:00
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const Function *F = MF.getFunction();
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2006-09-21 06:03:51 +08:00
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unsigned CC = F->getCallingConv();
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// Populate function information map. Actually, We don't want to populate
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// non-stdcall or non-fastcall functions' information right now.
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2006-09-26 11:57:53 +08:00
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if (CC == CallingConv::X86_StdCall || CC == CallingConv::X86_FastCall)
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2007-04-18 01:21:52 +08:00
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FunctionInfoMap[F] = *MF.getInfo<X86MachineFunctionInfo>();
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2006-09-21 06:03:51 +08:00
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X86SharedAsmPrinter::decorateName(CurrentFnName, F);
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2007-01-07 08:41:20 +08:00
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SwitchToTextSection(getSectionForFunction(*F).c_str(), F);
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2007-01-07 02:24:26 +08:00
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2006-02-07 16:38:37 +08:00
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switch (F->getLinkage()) {
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default: assert(0 && "Unknown linkage type!");
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case Function::InternalLinkage: // Symbols default to internal.
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2007-07-26 07:36:05 +08:00
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if (Subtarget->isTargetDarwin())
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// FIXME: This should be parameterized somewhere.
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EmitAlignment(4, F, 0, true, 0x90);
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else
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EmitAlignment(4, F); // FIXME: This should be parameterized somewhere.
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2006-02-07 16:38:37 +08:00
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break;
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2006-09-15 02:23:27 +08:00
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case Function::DLLExportLinkage:
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DLLExportedFns.insert(Mang->makeNameProper(F->getName(), ""));
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//FALLS THROUGH
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2006-02-07 16:38:37 +08:00
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case Function::ExternalLinkage:
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2007-07-26 07:36:05 +08:00
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if (Subtarget->isTargetDarwin())
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// FIXME: This should be parameterized somewhere.
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EmitAlignment(4, F, 0, true, 0x90);
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else
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EmitAlignment(4, F); // FIXME: This should be parameterized somewhere.
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2006-09-15 02:23:27 +08:00
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O << "\t.globl\t" << CurrentFnName << "\n";
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2006-02-07 16:38:37 +08:00
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break;
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case Function::LinkOnceLinkage:
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2006-10-18 17:12:29 +08:00
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case Function::WeakLinkage:
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2006-07-27 10:05:13 +08:00
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if (Subtarget->isTargetDarwin()) {
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2007-07-26 07:36:05 +08:00
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// FIXME: This should be parameterized somewhere.
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EmitAlignment(4, F, 0, true, 0x90);
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2006-02-23 07:59:57 +08:00
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O << "\t.globl\t" << CurrentFnName << "\n";
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2006-10-18 04:29:49 +08:00
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O << "\t.weak_definition\t" << CurrentFnName << "\n";
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2007-01-03 19:43:14 +08:00
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} else if (Subtarget->isTargetCygMing()) {
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2006-10-18 04:29:49 +08:00
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EmitAlignment(4, F); // FIXME: This should be parameterized somewhere.
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2007-10-05 23:54:58 +08:00
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O << "\t.globl\t" << CurrentFnName << "\n";
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2007-02-23 09:58:50 +08:00
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O << "\t.linkonce discard\n";
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2006-10-18 04:29:49 +08:00
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} else {
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EmitAlignment(4, F); // FIXME: This should be parameterized somewhere.
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2007-07-30 23:08:02 +08:00
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O << "\t.weak\t" << CurrentFnName << "\n";
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2006-10-18 04:29:49 +08:00
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}
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break;
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2006-02-07 16:38:37 +08:00
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}
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2007-04-30 02:35:00 +08:00
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if (F->hasHiddenVisibility()) {
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2007-01-14 14:29:53 +08:00
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if (const char *Directive = TAI->getHiddenDirective())
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O << Directive << CurrentFnName << "\n";
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2007-04-30 02:35:00 +08:00
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} else if (F->hasProtectedVisibility()) {
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if (const char *Directive = TAI->getProtectedDirective())
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O << Directive << CurrentFnName << "\n";
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}
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2007-01-17 00:41:57 +08:00
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if (Subtarget->isTargetELF())
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2007-07-30 23:08:02 +08:00
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O << "\t.type\t" << CurrentFnName << ",@function\n";
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2007-01-17 00:41:57 +08:00
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else if (Subtarget->isTargetCygMing()) {
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O << "\t.def\t " << CurrentFnName
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<< ";\t.scl\t" <<
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(F->getLinkage() == Function::InternalLinkage ? COFF::C_STAT : COFF::C_EXT)
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<< ";\t.type\t" << (COFF::DT_FCN << COFF::N_BTSHFT)
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<< ";\t.endef\n";
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}
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2005-07-02 06:44:09 +08:00
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O << CurrentFnName << ":\n";
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2006-10-18 17:12:29 +08:00
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// Add some workaround for linkonce linkage on Cygwin\MinGW
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2007-01-03 19:43:14 +08:00
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if (Subtarget->isTargetCygMing() &&
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2006-10-18 17:12:29 +08:00
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(F->getLinkage() == Function::LinkOnceLinkage ||
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F->getLinkage() == Function::WeakLinkage))
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2007-01-13 03:20:47 +08:00
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O << "Lllvm$workaround$fake$stub$" << CurrentFnName << ":\n";
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2005-07-02 06:44:09 +08:00
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2007-05-05 17:04:50 +08:00
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if (TAI->doesSupportDebugInformation()) {
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2006-04-08 04:44:42 +08:00
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// Emit pre-function debug information.
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2006-06-23 20:51:53 +08:00
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DW.BeginFunction(&MF);
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2006-04-08 04:44:42 +08:00
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}
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2005-07-02 06:44:09 +08:00
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// Print out code for the function.
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for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
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I != E; ++I) {
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// Print a label for the basic block.
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2007-10-04 03:26:29 +08:00
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if (!I->pred_empty()) {
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2006-05-02 13:37:32 +08:00
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printBasicBlockLabel(I, true);
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O << '\n';
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}
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2005-07-02 06:44:09 +08:00
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for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
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II != E; ++II) {
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// Print the assembly for the instruction.
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O << "\t";
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printMachineInstruction(II);
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}
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}
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2006-08-29 06:14:16 +08:00
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2006-09-07 02:34:40 +08:00
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if (TAI->hasDotTypeDotSizeDirective())
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2007-08-01 22:42:30 +08:00
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O << "\t.size\t" << CurrentFnName << ", .-" << CurrentFnName << "\n";
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2005-07-02 06:44:09 +08:00
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2007-05-05 17:04:50 +08:00
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if (TAI->doesSupportDebugInformation()) {
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2006-03-07 10:23:26 +08:00
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// Emit post-function debug information.
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2006-03-24 02:09:44 +08:00
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DW.EndFunction();
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2006-03-07 10:23:26 +08:00
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}
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2006-03-07 10:02:57 +08:00
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2007-05-05 17:04:50 +08:00
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// Print out jump tables referenced by the function.
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EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
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2005-07-02 06:44:09 +08:00
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// We didn't modify anything.
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return false;
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}
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2007-01-19 06:27:12 +08:00
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static inline bool printGOT(TargetMachine &TM, const X86Subtarget* ST) {
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return ST->isPICStyleGOT() && TM.getRelocationModel() == Reloc::PIC_;
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}
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static inline bool printStub(TargetMachine &TM, const X86Subtarget* ST) {
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return ST->isPICStyleStub() && TM.getRelocationModel() != Reloc::Static;
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}
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2006-02-07 07:41:19 +08:00
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void X86ATTAsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
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2006-12-06 03:50:18 +08:00
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const char *Modifier, bool NotRIPRel) {
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2006-02-07 07:41:19 +08:00
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const MachineOperand &MO = MI->getOperand(OpNo);
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2005-07-02 06:44:09 +08:00
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const MRegisterInfo &RI = *TM.getRegisterInfo();
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switch (MO.getType()) {
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2006-05-05 13:40:20 +08:00
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case MachineOperand::MO_Register: {
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2005-07-02 06:44:09 +08:00
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assert(MRegisterInfo::isPhysicalRegister(MO.getReg()) &&
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"Virtual registers should not make it this far!");
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O << '%';
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2006-05-05 13:40:20 +08:00
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unsigned Reg = MO.getReg();
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2006-06-01 06:34:26 +08:00
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if (Modifier && strncmp(Modifier, "subreg", strlen("subreg")) == 0) {
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2006-09-08 14:48:29 +08:00
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MVT::ValueType VT = (strcmp(Modifier+6,"64") == 0) ?
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MVT::i64 : ((strcmp(Modifier+6, "32") == 0) ? MVT::i32 :
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((strcmp(Modifier+6,"16") == 0) ? MVT::i16 : MVT::i8));
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2006-05-05 13:40:20 +08:00
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Reg = getX86SubSuperRegister(Reg, VT);
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}
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for (const char *Name = RI.get(Reg).Name; *Name; ++Name)
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2005-07-02 06:44:09 +08:00
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O << (char)tolower(*Name);
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return;
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2006-05-05 13:40:20 +08:00
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}
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2005-07-02 06:44:09 +08:00
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2006-05-05 01:21:20 +08:00
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case MachineOperand::MO_Immediate:
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2007-01-25 10:53:24 +08:00
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if (!Modifier ||
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(strcmp(Modifier, "debug") && strcmp(Modifier, "mem")))
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2006-03-07 10:02:57 +08:00
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O << '$';
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2006-05-26 16:04:31 +08:00
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O << MO.getImmedValue();
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2005-07-02 06:44:09 +08:00
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return;
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2006-04-23 02:53:45 +08:00
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case MachineOperand::MO_MachineBasicBlock:
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printBasicBlockLabel(MO.getMachineBasicBlock());
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2005-07-02 06:44:09 +08:00
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return;
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2006-04-23 02:53:45 +08:00
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case MachineOperand::MO_JumpTableIndex: {
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bool isMemOp = Modifier && !strcmp(Modifier, "mem");
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if (!isMemOp) O << '$';
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2007-10-14 13:57:21 +08:00
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O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber() << "_"
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<< MO.getJumpTableIndex();
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2007-01-13 03:20:47 +08:00
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if (TM.getRelocationModel() == Reloc::PIC_) {
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if (Subtarget->isPICStyleStub())
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2007-10-14 13:57:21 +08:00
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O << "-\"" << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
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<< "$pb\"";
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2007-01-13 03:20:47 +08:00
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else if (Subtarget->isPICStyleGOT())
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O << "@GOTOFF";
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}
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2007-01-19 06:27:12 +08:00
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if (isMemOp && Subtarget->isPICStyleRIPRel() && !NotRIPRel)
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2006-09-08 14:48:29 +08:00
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O << "(%rip)";
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2006-04-23 02:53:45 +08:00
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return;
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}
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2006-02-26 16:28:12 +08:00
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case MachineOperand::MO_ConstantPoolIndex: {
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bool isMemOp = Modifier && !strcmp(Modifier, "mem");
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if (!isMemOp) O << '$';
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2007-10-14 13:57:21 +08:00
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|
|
O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_"
|
|
|
|
<< MO.getConstantPoolIndex();
|
2007-01-13 03:20:47 +08:00
|
|
|
|
|
|
|
if (TM.getRelocationModel() == Reloc::PIC_) {
|
|
|
|
if (Subtarget->isPICStyleStub())
|
2007-10-14 13:57:21 +08:00
|
|
|
O << "-\"" << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
|
|
|
|
<< "$pb\"";
|
2007-01-19 06:27:12 +08:00
|
|
|
else if (Subtarget->isPICStyleGOT())
|
2007-01-13 03:20:47 +08:00
|
|
|
O << "@GOTOFF";
|
|
|
|
}
|
|
|
|
|
2006-02-26 16:28:12 +08:00
|
|
|
int Offset = MO.getOffset();
|
|
|
|
if (Offset > 0)
|
|
|
|
O << "+" << Offset;
|
|
|
|
else if (Offset < 0)
|
|
|
|
O << Offset;
|
2006-09-08 14:48:29 +08:00
|
|
|
|
2007-01-19 06:27:12 +08:00
|
|
|
if (isMemOp && Subtarget->isPICStyleRIPRel() && !NotRIPRel)
|
2006-09-08 14:48:29 +08:00
|
|
|
O << "(%rip)";
|
2006-02-26 16:28:12 +08:00
|
|
|
return;
|
|
|
|
}
|
2005-07-02 06:44:09 +08:00
|
|
|
case MachineOperand::MO_GlobalAddress: {
|
2006-02-07 07:41:19 +08:00
|
|
|
bool isCallOp = Modifier && !strcmp(Modifier, "call");
|
2006-02-07 16:38:37 +08:00
|
|
|
bool isMemOp = Modifier && !strcmp(Modifier, "mem");
|
2007-04-27 05:07:05 +08:00
|
|
|
bool needCloseParen = false;
|
2006-09-08 14:48:29 +08:00
|
|
|
|
2006-09-21 06:03:51 +08:00
|
|
|
GlobalValue *GV = MO.getGlobal();
|
2007-04-21 05:38:10 +08:00
|
|
|
GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV);
|
|
|
|
bool isThreadLocal = GVar && GVar->isThreadLocal();
|
|
|
|
|
2006-09-08 14:48:29 +08:00
|
|
|
std::string Name = Mang->getValueName(GV);
|
2006-09-26 11:57:53 +08:00
|
|
|
X86SharedAsmPrinter::decorateName(Name, GV);
|
2006-09-21 06:03:51 +08:00
|
|
|
|
2007-04-27 05:07:05 +08:00
|
|
|
if (!isMemOp && !isCallOp)
|
|
|
|
O << '$';
|
|
|
|
else if (Name[0] == '$') {
|
|
|
|
// The name begins with a dollar-sign. In order to avoid having it look
|
|
|
|
// like an integer immediate to the assembler, enclose it in parens.
|
|
|
|
O << '(';
|
|
|
|
needCloseParen = true;
|
|
|
|
}
|
|
|
|
|
2007-01-19 06:27:12 +08:00
|
|
|
if (printStub(TM, Subtarget)) {
|
2007-06-05 02:54:57 +08:00
|
|
|
// Link-once, declaration, or Weakly-linked global variables need
|
2006-02-07 16:38:37 +08:00
|
|
|
// non-lazily-resolved stubs
|
2007-01-31 04:08:39 +08:00
|
|
|
if (GV->isDeclaration() ||
|
2007-01-19 06:27:12 +08:00
|
|
|
GV->hasWeakLinkage() ||
|
|
|
|
GV->hasLinkOnceLinkage()) {
|
2006-02-07 16:38:37 +08:00
|
|
|
// Dynamically-resolved functions need a stub for the function.
|
2006-09-08 14:48:29 +08:00
|
|
|
if (isCallOp && isa<Function>(GV)) {
|
2006-02-07 16:38:37 +08:00
|
|
|
FnStubs.insert(Name);
|
2007-01-18 09:49:58 +08:00
|
|
|
O << TAI->getPrivateGlobalPrefix() << Name << "$stub";
|
2006-02-07 16:38:37 +08:00
|
|
|
} else {
|
|
|
|
GVStubs.insert(Name);
|
2007-01-18 09:49:58 +08:00
|
|
|
O << TAI->getPrivateGlobalPrefix() << Name << "$non_lazy_ptr";
|
2006-02-07 16:38:37 +08:00
|
|
|
}
|
2006-09-15 02:23:27 +08:00
|
|
|
} else {
|
2007-01-19 06:27:12 +08:00
|
|
|
if (GV->hasDLLImportLinkage())
|
2006-09-15 02:23:27 +08:00
|
|
|
O << "__imp_";
|
2006-09-08 14:48:29 +08:00
|
|
|
O << Name;
|
2006-09-15 02:23:27 +08:00
|
|
|
}
|
|
|
|
|
2006-07-27 05:12:04 +08:00
|
|
|
if (!isCallOp && TM.getRelocationModel() == Reloc::PIC_)
|
2007-10-14 13:57:21 +08:00
|
|
|
O << "-\"" << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
|
|
|
|
<< "$pb\"";
|
2006-09-15 02:23:27 +08:00
|
|
|
} else {
|
|
|
|
if (GV->hasDLLImportLinkage()) {
|
|
|
|
O << "__imp_";
|
|
|
|
}
|
2006-09-08 14:48:29 +08:00
|
|
|
O << Name;
|
2007-01-13 03:20:47 +08:00
|
|
|
|
2007-01-17 00:41:57 +08:00
|
|
|
if (isCallOp && isa<Function>(GV)) {
|
2007-01-19 06:27:12 +08:00
|
|
|
if (printGOT(TM, Subtarget)) {
|
2007-01-17 00:41:57 +08:00
|
|
|
// Assemble call via PLT for non-local symbols
|
2007-04-30 02:35:00 +08:00
|
|
|
if (!(GV->hasHiddenVisibility() || GV->hasProtectedVisibility()) ||
|
|
|
|
GV->isDeclaration())
|
2007-01-17 00:41:57 +08:00
|
|
|
O << "@PLT";
|
|
|
|
}
|
2007-01-31 04:08:39 +08:00
|
|
|
if (Subtarget->isTargetCygMing() && GV->isDeclaration())
|
2007-01-17 00:41:57 +08:00
|
|
|
// Save function name for later type emission
|
|
|
|
FnStubs.insert(Name);
|
2007-01-13 03:20:47 +08:00
|
|
|
}
|
2006-09-15 02:23:27 +08:00
|
|
|
}
|
2006-12-01 08:25:12 +08:00
|
|
|
|
2006-12-01 15:38:23 +08:00
|
|
|
if (GV->hasExternalWeakLinkage())
|
2006-12-18 11:37:18 +08:00
|
|
|
ExtWeakSymbols.insert(GV);
|
2006-09-15 02:23:27 +08:00
|
|
|
|
2005-07-02 06:44:09 +08:00
|
|
|
int Offset = MO.getOffset();
|
|
|
|
if (Offset > 0)
|
|
|
|
O << "+" << Offset;
|
|
|
|
else if (Offset < 0)
|
|
|
|
O << Offset;
|
2006-09-08 14:48:29 +08:00
|
|
|
|
2007-04-21 05:38:10 +08:00
|
|
|
if (isThreadLocal) {
|
|
|
|
if (TM.getRelocationModel() == Reloc::PIC_)
|
|
|
|
O << "@TLSGD"; // general dynamic TLS model
|
|
|
|
else
|
|
|
|
if (GV->isDeclaration())
|
|
|
|
O << "@INDNTPOFF"; // initial exec TLS model
|
|
|
|
else
|
|
|
|
O << "@NTPOFF"; // local exec TLS model
|
|
|
|
} else if (isMemOp) {
|
2007-01-19 06:27:12 +08:00
|
|
|
if (printGOT(TM, Subtarget)) {
|
2007-01-17 18:33:08 +08:00
|
|
|
if (Subtarget->GVRequiresExtraLoad(GV, TM, false))
|
2007-01-13 03:20:47 +08:00
|
|
|
O << "@GOT";
|
2007-01-17 18:33:08 +08:00
|
|
|
else
|
|
|
|
O << "@GOTOFF";
|
2007-11-05 03:23:28 +08:00
|
|
|
} else if (Subtarget->isPICStyleRIPRel() && !NotRIPRel &&
|
|
|
|
TM.getRelocationModel() != Reloc::Static) {
|
2007-06-05 02:54:57 +08:00
|
|
|
if ((GV->isDeclaration() ||
|
2007-01-19 06:27:12 +08:00
|
|
|
GV->hasWeakLinkage() ||
|
|
|
|
GV->hasLinkOnceLinkage()) &&
|
|
|
|
TM.getRelocationModel() != Reloc::Static)
|
|
|
|
O << "@GOTPCREL";
|
2007-04-27 05:07:05 +08:00
|
|
|
|
|
|
|
if (needCloseParen) {
|
|
|
|
needCloseParen = false;
|
|
|
|
O << ')';
|
|
|
|
}
|
|
|
|
|
2007-01-19 06:27:12 +08:00
|
|
|
// Use rip when possible to reduce code size, except when
|
|
|
|
// index or base register are also part of the address. e.g.
|
|
|
|
// foo(%rip)(%rcx,%rax,4) is not legal
|
|
|
|
O << "(%rip)";
|
|
|
|
}
|
2006-09-08 14:48:29 +08:00
|
|
|
}
|
|
|
|
|
2007-04-27 05:07:05 +08:00
|
|
|
if (needCloseParen)
|
|
|
|
O << ')';
|
|
|
|
|
2005-07-02 06:44:09 +08:00
|
|
|
return;
|
|
|
|
}
|
2006-02-07 07:41:19 +08:00
|
|
|
case MachineOperand::MO_ExternalSymbol: {
|
|
|
|
bool isCallOp = Modifier && !strcmp(Modifier, "call");
|
2007-04-27 05:07:05 +08:00
|
|
|
bool needCloseParen = false;
|
2007-01-13 03:20:47 +08:00
|
|
|
std::string Name(TAI->getGlobalPrefix());
|
|
|
|
Name += MO.getSymbolName();
|
2007-01-19 06:27:12 +08:00
|
|
|
if (isCallOp && printStub(TM, Subtarget)) {
|
2005-07-08 08:23:26 +08:00
|
|
|
FnStubs.insert(Name);
|
2007-01-18 09:49:58 +08:00
|
|
|
O << TAI->getPrivateGlobalPrefix() << Name << "$stub";
|
2005-07-08 08:23:26 +08:00
|
|
|
return;
|
|
|
|
}
|
2007-04-27 05:07:05 +08:00
|
|
|
if (!isCallOp)
|
|
|
|
O << '$';
|
|
|
|
else if (Name[0] == '$') {
|
|
|
|
// The name begins with a dollar-sign. In order to avoid having it look
|
|
|
|
// like an integer immediate to the assembler, enclose it in parens.
|
|
|
|
O << '(';
|
|
|
|
needCloseParen = true;
|
|
|
|
}
|
|
|
|
|
2007-01-13 03:20:47 +08:00
|
|
|
O << Name;
|
|
|
|
|
2007-01-19 06:27:12 +08:00
|
|
|
if (printGOT(TM, Subtarget)) {
|
2007-01-13 03:20:47 +08:00
|
|
|
std::string GOTName(TAI->getGlobalPrefix());
|
|
|
|
GOTName+="_GLOBAL_OFFSET_TABLE_";
|
|
|
|
if (Name == GOTName)
|
2007-01-19 06:27:12 +08:00
|
|
|
// HACK! Emit extra offset to PC during printing GOT offset to
|
|
|
|
// compensate for the size of popl instruction. The resulting code
|
|
|
|
// should look like:
|
2007-01-13 03:20:47 +08:00
|
|
|
// call .piclabel
|
|
|
|
// piclabel:
|
|
|
|
// popl %some_register
|
|
|
|
// addl $_GLOBAL_ADDRESS_TABLE_ + [.-piclabel], %some_register
|
2007-01-18 09:49:58 +08:00
|
|
|
O << " + [.-"
|
2007-10-14 13:57:21 +08:00
|
|
|
<< computePICLabel(getFunctionNumber(), TAI, Subtarget) << "]";
|
2007-01-13 03:20:47 +08:00
|
|
|
|
2007-01-19 06:27:12 +08:00
|
|
|
if (isCallOp)
|
|
|
|
O << "@PLT";
|
|
|
|
}
|
2006-09-08 14:48:29 +08:00
|
|
|
|
2007-04-27 05:07:05 +08:00
|
|
|
if (needCloseParen)
|
|
|
|
O << ')';
|
|
|
|
|
2007-01-19 06:27:12 +08:00
|
|
|
if (!isCallOp && Subtarget->isPICStyleRIPRel())
|
2006-09-08 14:48:29 +08:00
|
|
|
O << "(%rip)";
|
|
|
|
|
2005-07-02 06:44:09 +08:00
|
|
|
return;
|
2006-02-07 07:41:19 +08:00
|
|
|
}
|
2005-07-02 06:44:09 +08:00
|
|
|
default:
|
|
|
|
O << "<unknown operand type>"; return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-12-01 02:54:35 +08:00
|
|
|
void X86ATTAsmPrinter::printSSECC(const MachineInstr *MI, unsigned Op) {
|
2005-07-15 06:52:25 +08:00
|
|
|
unsigned char value = MI->getOperand(Op).getImmedValue();
|
|
|
|
assert(value <= 7 && "Invalid ssecc argument!");
|
|
|
|
switch (value) {
|
|
|
|
case 0: O << "eq"; break;
|
|
|
|
case 1: O << "lt"; break;
|
|
|
|
case 2: O << "le"; break;
|
|
|
|
case 3: O << "unord"; break;
|
|
|
|
case 4: O << "neq"; break;
|
|
|
|
case 5: O << "nlt"; break;
|
|
|
|
case 6: O << "nle"; break;
|
|
|
|
case 7: O << "ord"; break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2006-09-08 14:48:29 +08:00
|
|
|
void X86ATTAsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op,
|
|
|
|
const char *Modifier){
|
2005-07-02 06:44:09 +08:00
|
|
|
assert(isMem(MI, Op) && "Invalid memory reference!");
|
2007-01-14 08:13:07 +08:00
|
|
|
MachineOperand BaseReg = MI->getOperand(Op);
|
|
|
|
MachineOperand IndexReg = MI->getOperand(Op+2);
|
2005-07-02 06:44:09 +08:00
|
|
|
const MachineOperand &DispSpec = MI->getOperand(Op+3);
|
|
|
|
|
2006-12-06 03:50:18 +08:00
|
|
|
bool NotRIPRel = IndexReg.getReg() || BaseReg.getReg();
|
2006-08-30 06:14:48 +08:00
|
|
|
if (DispSpec.isGlobalAddress() ||
|
|
|
|
DispSpec.isConstantPoolIndex() ||
|
|
|
|
DispSpec.isJumpTableIndex()) {
|
2006-12-06 03:50:18 +08:00
|
|
|
printOperand(MI, Op+3, "mem", NotRIPRel);
|
2005-07-02 06:44:09 +08:00
|
|
|
} else {
|
|
|
|
int DispVal = DispSpec.getImmedValue();
|
|
|
|
if (DispVal || (!IndexReg.getReg() && !BaseReg.getReg()))
|
|
|
|
O << DispVal;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (IndexReg.getReg() || BaseReg.getReg()) {
|
2007-01-14 08:13:07 +08:00
|
|
|
unsigned ScaleVal = MI->getOperand(Op+1).getImmedValue();
|
|
|
|
unsigned BaseRegOperand = 0, IndexRegOperand = 2;
|
|
|
|
|
|
|
|
// There are cases where we can end up with ESP/RSP in the indexreg slot.
|
|
|
|
// If this happens, swap the base/index register to support assemblers that
|
|
|
|
// don't work when the index is *SP.
|
|
|
|
if (IndexReg.getReg() == X86::ESP || IndexReg.getReg() == X86::RSP) {
|
|
|
|
assert(ScaleVal == 1 && "Scale not supported for stack pointer!");
|
|
|
|
std::swap(BaseReg, IndexReg);
|
|
|
|
std::swap(BaseRegOperand, IndexRegOperand);
|
2006-09-08 14:48:29 +08:00
|
|
|
}
|
2007-01-14 08:13:07 +08:00
|
|
|
|
|
|
|
O << "(";
|
|
|
|
if (BaseReg.getReg())
|
|
|
|
printOperand(MI, Op+BaseRegOperand, Modifier);
|
2005-07-02 06:44:09 +08:00
|
|
|
|
|
|
|
if (IndexReg.getReg()) {
|
|
|
|
O << ",";
|
2007-01-14 08:13:07 +08:00
|
|
|
printOperand(MI, Op+IndexRegOperand, Modifier);
|
2005-07-02 06:44:09 +08:00
|
|
|
if (ScaleVal != 1)
|
|
|
|
O << "," << ScaleVal;
|
|
|
|
}
|
|
|
|
O << ")";
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
Much improved pic jumptable codegen:
Then:
call "L1$pb"
"L1$pb":
popl %eax
...
LBB1_1: # entry
imull $4, %ecx, %ecx
leal LJTI1_0-"L1$pb"(%eax), %edx
addl LJTI1_0-"L1$pb"(%ecx,%eax), %edx
jmpl *%edx
.align 2
.set L1_0_set_3,LBB1_3-LJTI1_0
.set L1_0_set_2,LBB1_2-LJTI1_0
.set L1_0_set_5,LBB1_5-LJTI1_0
.set L1_0_set_4,LBB1_4-LJTI1_0
LJTI1_0:
.long L1_0_set_3
.long L1_0_set_2
Now:
call "L1$pb"
"L1$pb":
popl %eax
...
LBB1_1: # entry
addl LJTI1_0-"L1$pb"(%eax,%ecx,4), %eax
jmpl *%eax
.align 2
.set L1_0_set_3,LBB1_3-"L1$pb"
.set L1_0_set_2,LBB1_2-"L1$pb"
.set L1_0_set_5,LBB1_5-"L1$pb"
.set L1_0_set_4,LBB1_4-"L1$pb"
LJTI1_0:
.long L1_0_set_3
.long L1_0_set_2
llvm-svn: 43924
2007-11-09 09:32:10 +08:00
|
|
|
void X86ATTAsmPrinter::printPICJumpTableSetLabel(unsigned uid,
|
|
|
|
const MachineBasicBlock *MBB) const {
|
|
|
|
if (!TAI->getSetDirective())
|
|
|
|
return;
|
|
|
|
|
|
|
|
O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
|
|
|
|
<< getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
|
|
|
|
printBasicBlockLabel(MBB, false, false);
|
2007-11-10 03:11:23 +08:00
|
|
|
if (Subtarget->isPICStyleRIPRel())
|
|
|
|
O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
|
|
|
|
<< '_' << uid << '\n';
|
|
|
|
else
|
|
|
|
O << '-' << computePICLabel(getFunctionNumber(), TAI, Subtarget) << '\n';
|
Much improved pic jumptable codegen:
Then:
call "L1$pb"
"L1$pb":
popl %eax
...
LBB1_1: # entry
imull $4, %ecx, %ecx
leal LJTI1_0-"L1$pb"(%eax), %edx
addl LJTI1_0-"L1$pb"(%ecx,%eax), %edx
jmpl *%edx
.align 2
.set L1_0_set_3,LBB1_3-LJTI1_0
.set L1_0_set_2,LBB1_2-LJTI1_0
.set L1_0_set_5,LBB1_5-LJTI1_0
.set L1_0_set_4,LBB1_4-LJTI1_0
LJTI1_0:
.long L1_0_set_3
.long L1_0_set_2
Now:
call "L1$pb"
"L1$pb":
popl %eax
...
LBB1_1: # entry
addl LJTI1_0-"L1$pb"(%eax,%ecx,4), %eax
jmpl *%eax
.align 2
.set L1_0_set_3,LBB1_3-"L1$pb"
.set L1_0_set_2,LBB1_2-"L1$pb"
.set L1_0_set_5,LBB1_5-"L1$pb"
.set L1_0_set_4,LBB1_4-"L1$pb"
LJTI1_0:
.long L1_0_set_3
.long L1_0_set_2
llvm-svn: 43924
2007-11-09 09:32:10 +08:00
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|
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}
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2006-02-18 08:15:05 +08:00
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|
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void X86ATTAsmPrinter::printPICLabel(const MachineInstr *MI, unsigned Op) {
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2007-10-14 13:57:21 +08:00
|
|
|
std::string label = computePICLabel(getFunctionNumber(), TAI, Subtarget);
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2007-01-13 03:20:47 +08:00
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O << label << "\n" << label << ":";
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2006-02-18 08:15:05 +08:00
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|
}
|
|
|
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|
2006-04-29 07:11:40 +08:00
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|
|
|
2006-04-29 07:19:39 +08:00
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|
bool X86ATTAsmPrinter::printAsmMRegister(const MachineOperand &MO,
|
2006-04-29 07:11:40 +08:00
|
|
|
const char Mode) {
|
|
|
|
const MRegisterInfo &RI = *TM.getRegisterInfo();
|
|
|
|
unsigned Reg = MO.getReg();
|
|
|
|
switch (Mode) {
|
|
|
|
default: return true; // Unknown mode.
|
|
|
|
case 'b': // Print QImode register
|
2006-05-05 13:40:20 +08:00
|
|
|
Reg = getX86SubSuperRegister(Reg, MVT::i8);
|
2006-04-29 07:11:40 +08:00
|
|
|
break;
|
|
|
|
case 'h': // Print QImode high register
|
2006-05-05 13:40:20 +08:00
|
|
|
Reg = getX86SubSuperRegister(Reg, MVT::i8, true);
|
2006-04-29 07:11:40 +08:00
|
|
|
break;
|
|
|
|
case 'w': // Print HImode register
|
2006-05-05 13:40:20 +08:00
|
|
|
Reg = getX86SubSuperRegister(Reg, MVT::i16);
|
2006-04-29 07:11:40 +08:00
|
|
|
break;
|
|
|
|
case 'k': // Print SImode register
|
2006-05-05 13:40:20 +08:00
|
|
|
Reg = getX86SubSuperRegister(Reg, MVT::i32);
|
2006-04-29 07:11:40 +08:00
|
|
|
break;
|
2007-10-29 11:09:07 +08:00
|
|
|
case 'q': // Print DImode register
|
|
|
|
Reg = getX86SubSuperRegister(Reg, MVT::i64);
|
|
|
|
break;
|
2006-04-29 07:11:40 +08:00
|
|
|
}
|
|
|
|
|
2006-05-05 13:40:20 +08:00
|
|
|
O << '%';
|
|
|
|
for (const char *Name = RI.get(Reg).Name; *Name; ++Name)
|
|
|
|
O << (char)tolower(*Name);
|
2006-04-29 07:11:40 +08:00
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
2006-04-29 05:19:05 +08:00
|
|
|
/// PrintAsmOperand - Print out an operand for an inline asm expression.
|
|
|
|
///
|
|
|
|
bool X86ATTAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
|
|
|
|
unsigned AsmVariant,
|
|
|
|
const char *ExtraCode) {
|
|
|
|
// Does this asm operand have a single letter operand modifier?
|
|
|
|
if (ExtraCode && ExtraCode[0]) {
|
|
|
|
if (ExtraCode[1] != 0) return true; // Unknown modifier.
|
|
|
|
|
|
|
|
switch (ExtraCode[0]) {
|
|
|
|
default: return true; // Unknown modifier.
|
2007-01-25 10:53:24 +08:00
|
|
|
case 'c': // Don't print "$" before a global var name or constant.
|
2006-11-01 04:12:30 +08:00
|
|
|
printOperand(MI, OpNo, "mem");
|
|
|
|
return false;
|
2006-04-29 07:11:40 +08:00
|
|
|
case 'b': // Print QImode register
|
|
|
|
case 'h': // Print QImode high register
|
|
|
|
case 'w': // Print HImode register
|
|
|
|
case 'k': // Print SImode register
|
2007-10-29 11:09:07 +08:00
|
|
|
case 'q': // Print DImode register
|
2007-09-15 04:33:02 +08:00
|
|
|
if (MI->getOperand(OpNo).isRegister())
|
2007-03-25 10:01:03 +08:00
|
|
|
return printAsmMRegister(MI->getOperand(OpNo), ExtraCode[0]);
|
|
|
|
printOperand(MI, OpNo);
|
|
|
|
return false;
|
2007-03-25 09:44:57 +08:00
|
|
|
|
|
|
|
case 'P': // Don't print @PLT, but do print as memory.
|
|
|
|
printOperand(MI, OpNo, "mem");
|
|
|
|
return false;
|
2006-04-29 05:19:05 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
printOperand(MI, OpNo);
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
bool X86ATTAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
|
|
|
|
unsigned OpNo,
|
|
|
|
unsigned AsmVariant,
|
|
|
|
const char *ExtraCode) {
|
2007-10-29 11:09:07 +08:00
|
|
|
if (ExtraCode && ExtraCode[0]) {
|
|
|
|
if (ExtraCode[1] != 0) return true; // Unknown modifier.
|
|
|
|
|
|
|
|
switch (ExtraCode[0]) {
|
|
|
|
default: return true; // Unknown modifier.
|
|
|
|
case 'b': // Print QImode register
|
|
|
|
case 'h': // Print QImode high register
|
|
|
|
case 'w': // Print HImode register
|
|
|
|
case 'k': // Print SImode register
|
|
|
|
case 'q': // Print SImode register
|
|
|
|
// These only apply to registers, ignore on mem.
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
2006-04-29 05:19:05 +08:00
|
|
|
printMemReference(MI, OpNo);
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
2005-07-02 06:44:09 +08:00
|
|
|
/// printMachineInstruction -- Print out a single X86 LLVM instruction
|
2007-06-25 23:11:25 +08:00
|
|
|
/// MI in AT&T syntax to the current output stream.
|
2005-07-02 06:44:09 +08:00
|
|
|
///
|
|
|
|
void X86ATTAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
|
|
|
|
++EmittedInsts;
|
2006-01-26 10:27:43 +08:00
|
|
|
|
2006-05-05 13:40:20 +08:00
|
|
|
// See if a truncate instruction can be turned into a nop.
|
|
|
|
switch (MI->getOpcode()) {
|
|
|
|
default: break;
|
2006-09-08 14:48:29 +08:00
|
|
|
case X86::PsMOVZX64rr32:
|
|
|
|
O << TAI->getCommentString() << " ZERO-EXTEND " << "\n\t";
|
|
|
|
break;
|
2006-05-05 13:40:20 +08:00
|
|
|
}
|
|
|
|
|
2005-07-02 06:44:09 +08:00
|
|
|
// Call the autogenerated instruction printer routines.
|
|
|
|
printInstruction(MI);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Include the auto-generated portion of the assembly writer.
|
|
|
|
#include "X86GenAsmWriter.inc"
|
|
|
|
|