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# Test for warnings when producing load hazards (instructions that

# reference the target of load one stage further down the pipeline.

# Written by Ben Elliston (bje@redhat.com)

# Run GAS and check that it emits the desired warning for the test case.

# Arguments:

#   file -- name of the test case to assemble.

#   testname -- a string describing the test.

#   warnpattern -- a regular expression, suitable for use by the Tcl

#     regexp command, to decide if the warning string was emitted by

#     the assembler to stderr.

proc iq2000_warning_test { file testname {warnpattern ""} } {

    global comp_output

    gas_run $file "" ">/dev/null"

    verbose "output was $comp_output" 2

    if {$warnpattern == ""} {

        if {$comp_output == ""} { pass $testname } else { fail $testname }

        return

    }

    if {[regexp "Warning: $warnpattern" $comp_output]} {

        pass $testname

    } else {

        fail $testname

    }

}

if [istarget iq2000*-*-*] {

    foreach file [glob -nocomplain -- $srcdir/$subdir/hazard*.s] {

        set file [file tail $file]

        switch -- $file {

            "hazard0.s" {

                set warnpattern "operand references R10 of previous load"

            }

            "hazard1.s" {

                set warnpattern "operand references R1 of previous load"

            }

            "hazard2.s" {

                set warnpattern "operand references R2 of previous load"

            }

            "hazard3.s" {

                set warnpattern "instruction implicitly accesses R31 of previous load"

            }

            "hazard4.s" {

                set warnpattern "operand references R10 of previous load"

            }

            "hazard5.s" {

                set warnpattern "operand references R8 of previous load"

            }

            default {

                error "no expected result specified for $file"

                return

            }

        }

        iq2000_warning_test $file "assembler emits load hazard warning for $file" $warnpattern

    }

    set testname "assembler emits no warnings when there are no load hazards"

    iq2000_warning_test nohazard.s $testname

}