// 	return b[0], err
// }
//
// // type assertions and type switches over generic types are strict
// type I3 interface {
//         m(int)
// }
//
// type I4 interface {
//         m() int // different signature from I3.m
// }
//
// func _[T I3](x I3, p T) {
//         // type assertions and type switches over interfaces are not strict
//         _ = x.(I4)
//         switch x.(type) {

== Choosing a log level

You can choose different log levels from the command line switches shown in <<#logLevelCommandLineOptions, Log level command-line options>>.

You can also configure the log level using <<build_environment.adoc#sec:gradle_configuration_properties,`gradle.properties`>>.

In <<#stacktraces,Stacktrace command-line options>> you can find the command line switches which affect stacktrace logging.

[[logLevelCommandLineOptions]]

	} else if b.gccSupportsFlag(compiler, "-fdebug-prefix-map=a=b") {
		defs = append(defs, "-fdebug-prefix-map="+b.WorkDir+"=/tmp/go-build")
	}
	if b.gccSupportsFlag(compiler, "-gno-record-gcc-switches") {
		defs = append(defs, "-gno-record-gcc-switches")
	}
	return b.Shell(a).run(p.Dir, p.ImportPath, nil, compiler, "-Wall", "-g",
		"-I", a.Objdir, "-I", inc, "-o", ofile, defs, "-c", cfile)
}

	m.Inter = inter
	m.Type = typ
	// The hash is used in type switches. However, compiler statically generates itab's
	// for all interface/type pairs used in switches (which are added to itabTable
	// in itabsinit). The dynamically-generated itab's never participate in type switches,
	// and thus the hash is irrelevant.
	// Note: m.Hash is _not_ the hash used for the runtime itabTable hash table.

//
// runtime.cgocall (below) calls entersyscall so as not to block
// other goroutines or the garbage collector, and then calls
// runtime.asmcgocall(_cgo_Cfunc_f, frame).
//
// runtime.asmcgocall (in asm_$GOARCH.s) switches to the m->g0 stack
// (assumed to be an operating system-allocated stack, so safe to run
// gcc-compiled code on) and calls _cgo_Cfunc_f(frame).
//
// _cgo_Cfunc_f invokes the actual C function f with arguments

// systemstack calls fn directly and returns.
// Otherwise, systemstack is being called from the limited stack
// of an ordinary goroutine. In this case, systemstack switches
// to the per-OS-thread stack, calls fn, and switches back.
// It is common to use a func literal as the argument, in order
// to share inputs and outputs with the code around the call
// to system stack:
//
//	... set up y ...

	STP.P	(R4, R5), 32(R3);			\
	STP	(R6, R7), -16(R3);			\
	SUB	$4, counter;

// func addVW(z, x []Word, y Word) (c Word)
// The 'large' branch handles large 'z'. It checks the carry flag on every iteration
// and switches to copy if we are done with carries. The copying is skipped as well
// if 'x' and 'z' happen to share the same underlying storage.
// The overhead of the checking and branching is visible when 'z' are small (~5%),

// A typeSwitch walks a type switch.
type typeSwitch struct {
	// Temporary variables (i.e., ONAMEs) used by type switch dispatch logic:
	srcName  ir.Node // value being type-switched on
	hashName ir.Node // type hash of the value being type-switched on
	okName   ir.Node // boolean used for comma-ok type assertions
	itabName ir.Node // itab value to use for first word of non-empty interface
}

type typeClause struct {

var counterSelectExec = telemetry.NewCounter("go/toolchain/select-exec")

// TestVersionSwitch is set in the test go binary to the value in $TESTGO_VERSION_SWITCH.
// Valid settings are:
//
//	"switch" - simulate version switches by reinvoking the test go binary with a different TESTGO_VERSION.
//	"mismatch" - like "switch" but forget to set TESTGO_VERSION, so it looks like we invoked a mismatched toolchain

// are no arguments.
TEXT	runtime·racecall(SB), NOSPLIT, $0-0
	MOVD	fn+0(FP), R1
	MOVD	arg0+8(FP), R2
	MOVD	arg1+16(FP), R3
	MOVD	arg2+24(FP), R4
	MOVD	arg3+32(FP), R5
	JMP	racecall<>(SB)

// Switches SP to g0 stack and calls R1. Arguments are already set.
TEXT	racecall<>(SB), NOSPLIT, $0-0
	BL	runtime·save_g(SB)		// Save g for callbacks.
	MOVD	R15, R7				// Save SP.
	MOVD	g_m(g), R8			// R8 = thread.