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https://github.com/c64scene-ar/llvm-6502.git
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0e3246a86f
that was resetting it. Remove the uses of DisableTailCalls in subclasses of TargetLowering and use the value of function attribute "disable-tail-calls" instead. Also, unconditionally add pass TailCallElim to the pipeline and check the function attribute at the start of runOnFunction to disable the pass on a per-function basis. This is part of the work to remove TargetMachine::resetTargetOptions, and since DisableTailCalls was the last non-fast-math option that was being reset in that function, we should be able to remove the function entirely after the work to propagate IR-level fast-math flags to DAG nodes is completed. Out-of-tree users should remove the uses of DisableTailCalls and make changes to attach attribute "disable-tail-calls"="true" or "false" to the functions in the IR. rdar://problem/13752163 Differential Revision: http://reviews.llvm.org/D10099 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239427 91177308-0d34-0410-b5e6-96231b3b80d8
330 lines
12 KiB
C++
330 lines
12 KiB
C++
//===-- CommandFlags.h - Command Line Flags Interface -----------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// 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 codegen-specific flags that are shared between different
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// command line tools. The tools "llc" and "opt" both use this file to prevent
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// flag duplication.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_COMMANDFLAGS_H
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#define LLVM_CODEGEN_COMMANDFLAGS_H
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/IR/Module.h"
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#include "llvm/MC/MCTargetOptionsCommandFlags.h"
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#include "llvm//MC/SubtargetFeature.h"
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#include "llvm/Support/CodeGen.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Host.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Target/TargetOptions.h"
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#include "llvm/Target/TargetRecip.h"
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#include <string>
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using namespace llvm;
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cl::opt<std::string>
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MArch("march", cl::desc("Architecture to generate code for (see --version)"));
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cl::opt<std::string>
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MCPU("mcpu",
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cl::desc("Target a specific cpu type (-mcpu=help for details)"),
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cl::value_desc("cpu-name"),
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cl::init(""));
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cl::list<std::string>
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MAttrs("mattr",
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cl::CommaSeparated,
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cl::desc("Target specific attributes (-mattr=help for details)"),
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cl::value_desc("a1,+a2,-a3,..."));
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cl::opt<Reloc::Model>
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RelocModel("relocation-model",
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cl::desc("Choose relocation model"),
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cl::init(Reloc::Default),
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cl::values(
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clEnumValN(Reloc::Default, "default",
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"Target default relocation model"),
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clEnumValN(Reloc::Static, "static",
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"Non-relocatable code"),
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clEnumValN(Reloc::PIC_, "pic",
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"Fully relocatable, position independent code"),
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clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic",
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"Relocatable external references, non-relocatable code"),
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clEnumValEnd));
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cl::opt<ThreadModel::Model>
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TMModel("thread-model",
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cl::desc("Choose threading model"),
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cl::init(ThreadModel::POSIX),
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cl::values(clEnumValN(ThreadModel::POSIX, "posix",
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"POSIX thread model"),
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clEnumValN(ThreadModel::Single, "single",
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"Single thread model"),
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clEnumValEnd));
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cl::opt<llvm::CodeModel::Model>
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CMModel("code-model",
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cl::desc("Choose code model"),
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cl::init(CodeModel::Default),
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cl::values(clEnumValN(CodeModel::Default, "default",
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"Target default code model"),
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clEnumValN(CodeModel::Small, "small",
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"Small code model"),
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clEnumValN(CodeModel::Kernel, "kernel",
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"Kernel code model"),
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clEnumValN(CodeModel::Medium, "medium",
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"Medium code model"),
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clEnumValN(CodeModel::Large, "large",
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"Large code model"),
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clEnumValEnd));
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cl::opt<TargetMachine::CodeGenFileType>
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FileType("filetype", cl::init(TargetMachine::CGFT_AssemblyFile),
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cl::desc("Choose a file type (not all types are supported by all targets):"),
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cl::values(
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clEnumValN(TargetMachine::CGFT_AssemblyFile, "asm",
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"Emit an assembly ('.s') file"),
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clEnumValN(TargetMachine::CGFT_ObjectFile, "obj",
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"Emit a native object ('.o') file"),
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clEnumValN(TargetMachine::CGFT_Null, "null",
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"Emit nothing, for performance testing"),
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clEnumValEnd));
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cl::opt<bool>
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EnableFPMAD("enable-fp-mad",
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cl::desc("Enable less precise MAD instructions to be generated"),
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cl::init(false));
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cl::opt<bool>
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DisableFPElim("disable-fp-elim",
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cl::desc("Disable frame pointer elimination optimization"),
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cl::init(false));
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cl::opt<bool>
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EnableUnsafeFPMath("enable-unsafe-fp-math",
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cl::desc("Enable optimizations that may decrease FP precision"),
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cl::init(false));
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cl::opt<bool>
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EnableNoInfsFPMath("enable-no-infs-fp-math",
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cl::desc("Enable FP math optimizations that assume no +-Infs"),
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cl::init(false));
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cl::opt<bool>
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EnableNoNaNsFPMath("enable-no-nans-fp-math",
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cl::desc("Enable FP math optimizations that assume no NaNs"),
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cl::init(false));
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cl::opt<bool>
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EnableHonorSignDependentRoundingFPMath("enable-sign-dependent-rounding-fp-math",
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cl::Hidden,
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cl::desc("Force codegen to assume rounding mode can change dynamically"),
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cl::init(false));
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cl::opt<llvm::FloatABI::ABIType>
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FloatABIForCalls("float-abi",
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cl::desc("Choose float ABI type"),
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cl::init(FloatABI::Default),
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cl::values(
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clEnumValN(FloatABI::Default, "default",
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"Target default float ABI type"),
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clEnumValN(FloatABI::Soft, "soft",
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"Soft float ABI (implied by -soft-float)"),
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clEnumValN(FloatABI::Hard, "hard",
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"Hard float ABI (uses FP registers)"),
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clEnumValEnd));
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cl::opt<llvm::FPOpFusion::FPOpFusionMode>
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FuseFPOps("fp-contract",
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cl::desc("Enable aggressive formation of fused FP ops"),
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cl::init(FPOpFusion::Standard),
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cl::values(
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clEnumValN(FPOpFusion::Fast, "fast",
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"Fuse FP ops whenever profitable"),
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clEnumValN(FPOpFusion::Standard, "on",
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"Only fuse 'blessed' FP ops."),
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clEnumValN(FPOpFusion::Strict, "off",
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"Only fuse FP ops when the result won't be effected."),
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clEnumValEnd));
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cl::list<std::string>
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ReciprocalOps("recip",
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cl::CommaSeparated,
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cl::desc("Choose reciprocal operation types and parameters."),
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cl::value_desc("all,none,default,divf,!vec-sqrtd,vec-divd:0,sqrt:9..."));
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cl::opt<bool>
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DontPlaceZerosInBSS("nozero-initialized-in-bss",
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cl::desc("Don't place zero-initialized symbols into bss section"),
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cl::init(false));
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cl::opt<bool>
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EnableGuaranteedTailCallOpt("tailcallopt",
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cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."),
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cl::init(false));
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cl::opt<bool>
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DisableTailCalls("disable-tail-calls",
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cl::desc("Never emit tail calls"),
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cl::init(false));
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cl::opt<unsigned>
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OverrideStackAlignment("stack-alignment",
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cl::desc("Override default stack alignment"),
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cl::init(0));
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cl::opt<std::string>
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TrapFuncName("trap-func", cl::Hidden,
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cl::desc("Emit a call to trap function rather than a trap instruction"),
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cl::init(""));
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cl::opt<bool>
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EnablePIE("enable-pie",
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cl::desc("Assume the creation of a position independent executable."),
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cl::init(false));
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cl::opt<bool>
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UseCtors("use-ctors",
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cl::desc("Use .ctors instead of .init_array."),
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cl::init(false));
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cl::opt<std::string> StopAfter("stop-after",
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cl::desc("Stop compilation after a specific pass"),
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cl::value_desc("pass-name"),
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cl::init(""));
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cl::opt<std::string> StartAfter("start-after",
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cl::desc("Resume compilation after a specific pass"),
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cl::value_desc("pass-name"),
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cl::init(""));
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cl::opt<bool> DataSections("data-sections",
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cl::desc("Emit data into separate sections"),
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cl::init(false));
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cl::opt<bool>
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FunctionSections("function-sections",
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cl::desc("Emit functions into separate sections"),
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cl::init(false));
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cl::opt<bool> UniqueSectionNames("unique-section-names",
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cl::desc("Give unique names to every section"),
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cl::init(true));
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cl::opt<llvm::JumpTable::JumpTableType>
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JTableType("jump-table-type",
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cl::desc("Choose the type of Jump-Instruction Table for jumptable."),
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cl::init(JumpTable::Single),
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cl::values(
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clEnumValN(JumpTable::Single, "single",
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"Create a single table for all jumptable functions"),
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clEnumValN(JumpTable::Arity, "arity",
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"Create one table per number of parameters."),
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clEnumValN(JumpTable::Simplified, "simplified",
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"Create one table per simplified function type."),
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clEnumValN(JumpTable::Full, "full",
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"Create one table per unique function type."),
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clEnumValEnd));
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// Common utility function tightly tied to the options listed here. Initializes
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// a TargetOptions object with CodeGen flags and returns it.
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static inline TargetOptions InitTargetOptionsFromCodeGenFlags() {
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TargetOptions Options;
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Options.LessPreciseFPMADOption = EnableFPMAD;
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Options.AllowFPOpFusion = FuseFPOps;
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Options.Reciprocals = TargetRecip(ReciprocalOps);
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Options.UnsafeFPMath = EnableUnsafeFPMath;
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Options.NoInfsFPMath = EnableNoInfsFPMath;
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Options.NoNaNsFPMath = EnableNoNaNsFPMath;
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Options.HonorSignDependentRoundingFPMathOption =
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EnableHonorSignDependentRoundingFPMath;
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if (FloatABIForCalls != FloatABI::Default)
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Options.FloatABIType = FloatABIForCalls;
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Options.NoZerosInBSS = DontPlaceZerosInBSS;
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Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt;
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Options.StackAlignmentOverride = OverrideStackAlignment;
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Options.TrapFuncName = TrapFuncName;
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Options.PositionIndependentExecutable = EnablePIE;
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Options.UseInitArray = !UseCtors;
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Options.DataSections = DataSections;
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Options.FunctionSections = FunctionSections;
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Options.UniqueSectionNames = UniqueSectionNames;
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Options.MCOptions = InitMCTargetOptionsFromFlags();
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Options.JTType = JTableType;
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Options.ThreadModel = TMModel;
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return Options;
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}
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static inline std::string getCPUStr() {
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// If user asked for the 'native' CPU, autodetect here. If autodection fails,
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// this will set the CPU to an empty string which tells the target to
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// pick a basic default.
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if (MCPU == "native")
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return sys::getHostCPUName();
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return MCPU;
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}
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static inline std::string getFeaturesStr() {
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SubtargetFeatures Features;
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// If user asked for the 'native' CPU, we need to autodetect features.
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// This is necessary for x86 where the CPU might not support all the
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// features the autodetected CPU name lists in the target. For example,
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// not all Sandybridge processors support AVX.
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if (MCPU == "native") {
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StringMap<bool> HostFeatures;
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if (sys::getHostCPUFeatures(HostFeatures))
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for (auto &F : HostFeatures)
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Features.AddFeature(F.first(), F.second);
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}
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for (unsigned i = 0; i != MAttrs.size(); ++i)
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Features.AddFeature(MAttrs[i]);
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return Features.getString();
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}
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/// \brief Set function attributes of functions in Module M based on CPU,
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/// Features, and command line flags.
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static inline void setFunctionAttributes(StringRef CPU, StringRef Features,
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Module &M) {
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for (auto &F : M) {
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auto &Ctx = F.getContext();
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AttributeSet Attrs = F.getAttributes(), NewAttrs;
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if (!CPU.empty())
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NewAttrs = NewAttrs.addAttribute(Ctx, AttributeSet::FunctionIndex,
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"target-cpu", CPU);
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if (!Features.empty())
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NewAttrs = NewAttrs.addAttribute(Ctx, AttributeSet::FunctionIndex,
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"target-features", Features);
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if (DisableFPElim.getNumOccurrences() > 0)
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NewAttrs = NewAttrs.addAttribute(Ctx, AttributeSet::FunctionIndex,
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"no-frame-pointer-elim",
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DisableFPElim ? "true" : "false");
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if (DisableTailCalls.getNumOccurrences() > 0)
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NewAttrs = NewAttrs.addAttribute(Ctx, AttributeSet::FunctionIndex,
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"disable-tail-calls",
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toStringRef(DisableTailCalls));
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// Let NewAttrs override Attrs.
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NewAttrs = Attrs.addAttributes(Ctx, AttributeSet::FunctionIndex, NewAttrs);
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F.setAttributes(NewAttrs);
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}
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}
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#endif
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