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-rw-r--r--tools/llc/llc.cpp169
1 files changed, 104 insertions, 65 deletions
diff --git a/tools/llc/llc.cpp b/tools/llc/llc.cpp
index ceff8a6c8cc8..8951050c07cd 100644
--- a/tools/llc/llc.cpp
+++ b/tools/llc/llc.cpp
@@ -18,6 +18,7 @@
#include "llvm/PassManager.h"
#include "llvm/Pass.h"
#include "llvm/ADT/Triple.h"
+#include "llvm/Assembly/PrintModulePass.h"
#include "llvm/Support/IRReader.h"
#include "llvm/CodeGen/LinkAllAsmWriterComponents.h"
#include "llvm/CodeGen/LinkAllCodegenComponents.h"
@@ -34,6 +35,7 @@
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetLibraryInfo.h"
#include "llvm/Target/TargetMachine.h"
#include <memory>
using namespace llvm;
@@ -118,7 +120,7 @@ FileType("filetype", cl::init(TargetMachine::CGFT_AssemblyFile),
clEnumValN(TargetMachine::CGFT_AssemblyFile, "asm",
"Emit an assembly ('.s') file"),
clEnumValN(TargetMachine::CGFT_ObjectFile, "obj",
- "Emit a native object ('.o') file [experimental]"),
+ "Emit a native object ('.o') file"),
clEnumValN(TargetMachine::CGFT_Null, "null",
"Emit nothing, for performance testing"),
clEnumValEnd));
@@ -146,11 +148,6 @@ EnableFPMAD("enable-fp-mad",
cl::init(false));
static cl::opt<bool>
-PrintCode("print-machineinstrs",
- cl::desc("Print generated machine code"),
- cl::init(false));
-
-static cl::opt<bool>
DisableFPElim("disable-fp-elim",
cl::desc("Disable frame pointer elimination optimization"),
cl::init(false));
@@ -161,11 +158,6 @@ DisableFPElimNonLeaf("disable-non-leaf-fp-elim",
cl::init(false));
static cl::opt<bool>
-DisableExcessPrecision("disable-excess-fp-precision",
- cl::desc("Disable optimizations that may increase FP precision"),
- cl::init(false));
-
-static cl::opt<bool>
EnableUnsafeFPMath("enable-unsafe-fp-math",
cl::desc("Enable optimizations that may decrease FP precision"),
cl::init(false));
@@ -204,12 +196,30 @@ FloatABIForCalls("float-abi",
"Hard float ABI (uses FP registers)"),
clEnumValEnd));
+static cl::opt<llvm::FPOpFusion::FPOpFusionMode>
+FuseFPOps("fp-contract",
+ cl::desc("Enable aggresive formation of fused FP ops"),
+ cl::init(FPOpFusion::Standard),
+ cl::values(
+ clEnumValN(FPOpFusion::Fast, "fast",
+ "Fuse FP ops whenever profitable"),
+ clEnumValN(FPOpFusion::Standard, "on",
+ "Only fuse 'blessed' FP ops."),
+ clEnumValN(FPOpFusion::Strict, "off",
+ "Only fuse FP ops when the result won't be effected."),
+ clEnumValEnd));
+
static cl::opt<bool>
DontPlaceZerosInBSS("nozero-initialized-in-bss",
cl::desc("Don't place zero-initialized symbols into bss section"),
cl::init(false));
static cl::opt<bool>
+DisableSimplifyLibCalls("disable-simplify-libcalls",
+ cl::desc("Disable simplify-libcalls"),
+ cl::init(false));
+
+static cl::opt<bool>
EnableGuaranteedTailCallOpt("tailcallopt",
cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."),
cl::init(false));
@@ -229,11 +239,6 @@ EnableRealignStack("realign-stack",
cl::desc("Realign stack if needed"),
cl::init(true));
-static cl::opt<bool>
-DisableSwitchTables(cl::Hidden, "disable-jump-tables",
- cl::desc("Do not generate jump tables."),
- cl::init(false));
-
static cl::opt<std::string>
TrapFuncName("trap-func", cl::Hidden,
cl::desc("Emit a call to trap function rather than a trap instruction"),
@@ -249,6 +254,19 @@ SegmentedStacks("segmented-stacks",
cl::desc("Use segmented stacks if possible."),
cl::init(false));
+static cl::opt<bool>
+UseInitArray("use-init-array",
+ cl::desc("Use .init_array instead of .ctors."),
+ cl::init(false));
+
+static cl::opt<std::string> StopAfter("stop-after",
+ cl::desc("Stop compilation after a specific pass"),
+ cl::value_desc("pass-name"),
+ cl::init(""));
+static cl::opt<std::string> StartAfter("start-after",
+ cl::desc("Resume compilation after a specific pass"),
+ cl::value_desc("pass-name"),
+ cl::init(""));
// GetFileNameRoot - Helper function to get the basename of a filename.
static inline std::string
@@ -346,6 +364,15 @@ int main(int argc, char **argv) {
InitializeAllAsmPrinters();
InitializeAllAsmParsers();
+ // Initialize codegen and IR passes used by llc so that the -print-after,
+ // -print-before, and -stop-after options work.
+ PassRegistry *Registry = PassRegistry::getPassRegistry();
+ initializeCore(*Registry);
+ initializeCodeGen(*Registry);
+ initializeLoopStrengthReducePass(*Registry);
+ initializeLowerIntrinsicsPass(*Registry);
+ initializeUnreachableBlockElimPass(*Registry);
+
// Register the target printer for --version.
cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
@@ -354,54 +381,39 @@ int main(int argc, char **argv) {
// Load the module to be compiled...
SMDiagnostic Err;
std::auto_ptr<Module> M;
+ Module *mod = 0;
+ Triple TheTriple;
+
+ bool SkipModule = MCPU == "help" ||
+ (!MAttrs.empty() && MAttrs.front() == "help");
+
+ // If user just wants to list available options, skip module loading
+ if (!SkipModule) {
+ M.reset(ParseIRFile(InputFilename, Err, Context));
+ mod = M.get();
+ if (mod == 0) {
+ Err.print(argv[0], errs());
+ return 1;
+ }
- M.reset(ParseIRFile(InputFilename, Err, Context));
- if (M.get() == 0) {
- Err.print(argv[0], errs());
- return 1;
+ // If we are supposed to override the target triple, do so now.
+ if (!TargetTriple.empty())
+ mod->setTargetTriple(Triple::normalize(TargetTriple));
+ TheTriple = Triple(mod->getTargetTriple());
+ } else {
+ TheTriple = Triple(Triple::normalize(TargetTriple));
}
- Module &mod = *M.get();
- // If we are supposed to override the target triple, do so now.
- if (!TargetTriple.empty())
- mod.setTargetTriple(Triple::normalize(TargetTriple));
-
- Triple TheTriple(mod.getTargetTriple());
if (TheTriple.getTriple().empty())
TheTriple.setTriple(sys::getDefaultTargetTriple());
- // Allocate target machine. First, check whether the user has explicitly
- // specified an architecture to compile for. If so we have to look it up by
- // name, because it might be a backend that has no mapping to a target triple.
- const Target *TheTarget = 0;
- if (!MArch.empty()) {
- for (TargetRegistry::iterator it = TargetRegistry::begin(),
- ie = TargetRegistry::end(); it != ie; ++it) {
- if (MArch == it->getName()) {
- TheTarget = &*it;
- break;
- }
- }
-
- if (!TheTarget) {
- errs() << argv[0] << ": error: invalid target '" << MArch << "'.\n";
- return 1;
- }
-
- // Adjust the triple to match (if known), otherwise stick with the
- // module/host triple.
- Triple::ArchType Type = Triple::getArchTypeForLLVMName(MArch);
- if (Type != Triple::UnknownArch)
- TheTriple.setArch(Type);
- } else {
- std::string Err;
- TheTarget = TargetRegistry::lookupTarget(TheTriple.getTriple(), Err);
- if (TheTarget == 0) {
- errs() << argv[0] << ": error auto-selecting target for module '"
- << Err << "'. Please use the -march option to explicitly "
- << "pick a target.\n";
- return 1;
- }
+ // Get the target specific parser.
+ std::string Error;
+ const Target *TheTarget = TargetRegistry::lookupTarget(MArch, TheTriple,
+ Error);
+ if (!TheTarget) {
+ errs() << argv[0] << ": " << Error;
+ return 1;
}
// Package up features to be passed to target/subtarget
@@ -427,10 +439,9 @@ int main(int argc, char **argv) {
TargetOptions Options;
Options.LessPreciseFPMADOption = EnableFPMAD;
- Options.PrintMachineCode = PrintCode;
Options.NoFramePointerElim = DisableFPElim;
Options.NoFramePointerElimNonLeaf = DisableFPElimNonLeaf;
- Options.NoExcessFPPrecision = DisableExcessPrecision;
+ Options.AllowFPOpFusion = FuseFPOps;
Options.UnsafeFPMath = EnableUnsafeFPMath;
Options.NoInfsFPMath = EnableNoInfsFPMath;
Options.NoNaNsFPMath = EnableNoNaNsFPMath;
@@ -444,16 +455,17 @@ int main(int argc, char **argv) {
Options.DisableTailCalls = DisableTailCalls;
Options.StackAlignmentOverride = OverrideStackAlignment;
Options.RealignStack = EnableRealignStack;
- Options.DisableJumpTables = DisableSwitchTables;
Options.TrapFuncName = TrapFuncName;
Options.PositionIndependentExecutable = EnablePIE;
Options.EnableSegmentedStacks = SegmentedStacks;
+ Options.UseInitArray = UseInitArray;
std::auto_ptr<TargetMachine>
target(TheTarget->createTargetMachine(TheTriple.getTriple(),
MCPU, FeaturesStr, Options,
RelocModel, CMModel, OLvl));
assert(target.get() && "Could not allocate target machine!");
+ assert(mod && "Should have exited after outputting help!");
TargetMachine &Target = *target.get();
if (DisableDotLoc)
@@ -473,7 +485,7 @@ int main(int argc, char **argv) {
TheTriple.isMacOSXVersionLT(10, 6))
Target.setMCUseLoc(false);
- // Figure out where we are going to send the output...
+ // Figure out where we are going to send the output.
OwningPtr<tool_output_file> Out
(GetOutputStream(TheTarget->getName(), TheTriple.getOS(), argv[0]));
if (!Out) return 1;
@@ -481,11 +493,17 @@ int main(int argc, char **argv) {
// Build up all of the passes that we want to do to the module.
PassManager PM;
+ // Add an appropriate TargetLibraryInfo pass for the module's triple.
+ TargetLibraryInfo *TLI = new TargetLibraryInfo(TheTriple);
+ if (DisableSimplifyLibCalls)
+ TLI->disableAllFunctions();
+ PM.add(TLI);
+
// Add the target data from the target machine, if it exists, or the module.
if (const TargetData *TD = Target.getTargetData())
PM.add(new TargetData(*TD));
else
- PM.add(new TargetData(&mod));
+ PM.add(new TargetData(mod));
// Override default to generate verbose assembly.
Target.setAsmVerbosityDefault(true);
@@ -501,8 +519,29 @@ int main(int argc, char **argv) {
{
formatted_raw_ostream FOS(Out->os());
+ AnalysisID StartAfterID = 0;
+ AnalysisID StopAfterID = 0;
+ const PassRegistry *PR = PassRegistry::getPassRegistry();
+ if (!StartAfter.empty()) {
+ const PassInfo *PI = PR->getPassInfo(StartAfter);
+ if (!PI) {
+ errs() << argv[0] << ": start-after pass is not registered.\n";
+ return 1;
+ }
+ StartAfterID = PI->getTypeInfo();
+ }
+ if (!StopAfter.empty()) {
+ const PassInfo *PI = PR->getPassInfo(StopAfter);
+ if (!PI) {
+ errs() << argv[0] << ": stop-after pass is not registered.\n";
+ return 1;
+ }
+ StopAfterID = PI->getTypeInfo();
+ }
+
// Ask the target to add backend passes as necessary.
- if (Target.addPassesToEmitFile(PM, FOS, FileType, NoVerify)) {
+ if (Target.addPassesToEmitFile(PM, FOS, FileType, NoVerify,
+ StartAfterID, StopAfterID)) {
errs() << argv[0] << ": target does not support generation of this"
<< " file type!\n";
return 1;
@@ -511,7 +550,7 @@ int main(int argc, char **argv) {
// Before executing passes, print the final values of the LLVM options.
cl::PrintOptionValues();
- PM.run(mod);
+ PM.run(*mod);
}
// Declare success.
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 02:47:41 +0000