forked from OSchip/llvm-project
103 lines
3.0 KiB
Go
103 lines
3.0 KiB
Go
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//===- targets.go - target data -------------------------------------------===//
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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 functions for retrieving target-specific data.
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//
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//===----------------------------------------------------------------------===//
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package irgen
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import (
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"fmt"
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"strings"
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"llvm.org/llvm/bindings/go/llvm"
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)
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// PNaClTriple is the LLVM target triple that should be used to compile
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// modules to be compatible with PNaCl (Portable Native Client).
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const PNaClTriple = "armv7-none-linux-gnueabi"
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// Below are the target data representation constants generated by clang.
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// For unknown targets, we enumerate all targets known to LLVM and use
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// the first one with a matching architecture.
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const (
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x86TargetData = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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)
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// llvmDataLayout returns the data layout string
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// representation for the specified LLVM triple.
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func llvmDataLayout(triple string) (string, error) {
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// Triples are several fields separated by '-' characters.
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// The first field is the architecture. The architecture's
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// canonical form may include a '-' character, which would
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// have been translated to '_' for inclusion in a triple.
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arch := parseArch(triple[:strings.IndexRune(triple, '-')])
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switch arch {
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case "x86-64":
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return x86TargetData, nil
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}
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for target := llvm.FirstTarget(); target.C != nil; target = target.NextTarget() {
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if arch == target.Name() {
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machine := target.CreateTargetMachine(
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triple, "", "",
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llvm.CodeGenLevelDefault,
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llvm.RelocDefault,
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llvm.CodeModelDefault,
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)
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target := machine.TargetData().String()
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machine.Dispose()
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return target, nil
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}
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}
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return "", fmt.Errorf("Invalid target triple: %s", triple)
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}
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// Based on parseArch from LLVM's lib/Support/Triple.cpp.
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// This is used to match the target machine type.
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func parseArch(arch string) string {
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switch arch {
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case "i386", "i486", "i586", "i686", "i786", "i886", "i986":
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return "x86"
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case "amd64", "x86_64":
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return "x86-64"
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case "powerpc":
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return "ppc"
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case "powerpc64", "ppu":
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return "ppc64"
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case "mblaze":
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return "mblaze"
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case "arm", "xscale":
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return "arm"
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case "thumb":
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return "thumb"
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case "spu", "cellspu":
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return "cellspu"
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case "msp430":
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return "msp430"
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case "mips", "mipseb", "mipsallegrex":
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return "mips"
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case "mipsel", "mipsallegrexel":
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return "mipsel"
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case "mips64", "mips64eb":
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return "mips64"
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case "mipsel64":
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return "mipsel64"
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case "r600", "hexagon", "sparc", "sparcv9", "tce",
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"xcore", "nvptx", "nvptx64", "le32", "amdil":
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return arch
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}
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if strings.HasPrefix(arch, "armv") {
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return "arm"
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} else if strings.HasPrefix(arch, "thumbv") {
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return "thumb"
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}
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return "unknown"
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}
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