//   - the order of f.Blocks is the order to emit the Blocks
//   - the order of b.Values is the order to emit the Values in each Block
//   - f has a non-nil regAlloc field
func Compile(f *Func) {
	// TODO: debugging - set flags to control verbosity of compiler,
	// which phases to dump IR before/after, etc.
	if f.Log() {
		f.Logf("compiling %s\n", f.Name)
	}

	var rnd *rand.Rand
	if checkEnabled {

	flag.Var(&I, "I", "include directory; can be set multiple times")
	flag.BoolVar(&DebugV, "v", false, "print debug output")
	flag.Var(objabi.NewDebugFlag(&DebugFlags, nil), "d", "enable debugging settings; try -d help")
	objabi.AddVersionFlag() // -V
	objabi.Flagcount("S", "print assembly and machine code", &PrintOut)
}

// MultiFlag allows setting a value multiple times to collect a list, as in -I=dir1 -I=dir2.

		wantStmts = wantStmts[1:]
	}
	testDebugLines(t, gcflags, file, function, wantStmts, ignoreRepeats)
}

func TestDebugLinesSayHi(t *testing.T) {
	// This test is potentially fragile, the goal is that debugging should step properly through "sayhi"
	// If the blocks are reordered in a way that changes the statement order but execution flows correctly,

	return reachable
}

// liveValues returns the live values in f and a list of values that are eligible
// to be statements in reversed data flow order.
// The second result is used to help conserve statement boundaries for debugging.
// reachable is a map from block ID to whether the block is reachable.
// The caller should call f.Cache.freeBoolSlice(live) and f.Cache.freeValueSlice(liveOrderStmts).
// when they are done with the return values.

		po.noneq[i1] = bs
	} else if bs.Test(i2) {
		// Already recorded
		return
	}
	bs.Set(i2)
	po.upushneq(i1, i2)
}

// CheckIntegrity verifies internal integrity of a poset. It is intended
// for debugging purposes.
func (po *poset) CheckIntegrity() {
	// Record which index is a constant
	constants := newBitset(int(po.lastidx + 1))
	for _, c := range po.constants {
		constants.Set(c)
	}

invoking the C compiler to compile the C parts of the package.

The following options are available when running cgo directly:

	-V
		Print cgo version and exit.
	-debug-define
		Debugging option. Print #defines.
	-debug-gcc
		Debugging option. Trace C compiler execution and output.
	-dynimport file
		Write list of symbols imported by file. Write to
		-dynout argument or to standard output. Used by go

	returnFeedsFuncToIndCallAdj:           -25,
	returnFeedsInlinableFuncToIndCallAdj:  -40,
	returnFeedsConcreteToInterfaceCallAdj: -25,
}

// SetupScoreAdjustments interprets the value of the -d=inlscoreadj
// debugging option, if set. The value of this flag is expected to be
// a series of "/"-separated clauses of the form adj1:value1. Example:
// -d=inlscoreadj=inLoopAdj=0/passConstToIfAdj=-99
func SetupScoreAdjustments() {

		}
		needType = append(needType, n)
	}
	if nerrors > 0 {
		// Check if compiling the preamble by itself causes any errors,
		// because the messages we've printed out so far aren't helpful
		// to users debugging preamble mistakes. See issue 8442.
		preambleErrors := p.gccErrors([]byte(builtinProlog + f.Preamble))
		if len(preambleErrors) > 0 {
			error_(token.NoPos, "\n%s errors for preamble:\n%s", gccBaseCmd[0], preambleErrors)
		}

					f.Fatalf("%s appeared outside of entry block, b=%s", v.Op, b.String())
				}
				score[v.ID] = ScorePhi
			case v.Op == OpArg || v.Op == OpSP || v.Op == OpSB:
				// We want all the args as early as possible, for better debugging.
				score[v.ID] = ScoreArg
			case v.Op == OpInitMem:
				// Early, but after args. See debug.go:buildLocationLists
				score[v.ID] = ScoreInitMem
			case v.Type.IsMemory():

	end, endOK := encodeValue(ctxt, f.Entry.ID, en)
	if !startOK || !endOK {
		// This could happen if someone writes a function that uses
		// >65K values on a 32-bit platform. Hopefully a degraded debugging
		// experience is ok in that case.
		return nil, 0
	}
	list = appendPtr(ctxt, list, start)
	list = appendPtr(ctxt, list, end)

	// Where to write the length of the location description once