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Overview
Comment: | Bug fixes to make all the 'expandtest' cases work |
---|---|
Timelines: | family | ancestors | descendants | both | notworking | kbk-refactor-callframe |
Files: | files | file ages | folders |
SHA3-256: |
4f7b3a4d01211450fd3d4b4e993cd17c |
User & Date: | kbk 2019-01-22 02:35:48 |
Context
2019-01-22
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02:36 | Run dead code elimination before copy propagation because copyprop explodes otherwise. check-in: 9e16d3b8d6 user: kbk tags: notworking, kbk-refactor-callframe | |
02:35 | Bug fixes to make all the 'expandtest' cases work check-in: 4f7b3a4d01 user: kbk tags: notworking, kbk-refactor-callframe | |
2019-01-21
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22:33 | Enough partial implementation for expandtest::test1-test3 check-in: 89030dcc42 user: kbk tags: notworking, kbk-refactor-callframe | |
Changes
Changes to quadcode/varargs.tcl.
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# Any leading plain arguments that do not have {*} can simply be retained # in the parameter list of [invoke]. # $pos will be the position in the parameter list of the first # parameter that needs special handling. set argl [lrange $q 4 end] set pos 0 while {$pos < $nPlainParams} { if {[my va_NonExpandedArgument newq $arginfo $pos $argl]} break incr pos } my debug-varargs { puts "varargs: $b:$pc: matched $pos out of $nPlainParams\ ................................................................................ info default $callee [lindex $arginfo $i] defaultVal my debug-varargs { puts "Emit length check and extraction for optional param \ $i: [lindex $arginfo $i] (default=$defaultVal)" } lassign [my va_UnpackOptional $B $newq $j] \ newq fromBlock argLoc lappend optInfo [list $fromBlock $defaultVal $argLoc] incr i incr j } error "NOT FINISHED - Close out the optional params." # Close out the last basic block, switch to the 'finish' block # and emit 'phi' instructions to get the correct parameter set my va_FinishOptional b bb newq $finishB $optInfo } # If the procedure has 'args', then fill it in with the remainder of the # arg list. if {$haveargs} { my va_DoArgs $B newq $j } else { error "NOT DONE - varargs needs to check for excess args" my va_CheckTooMany b bb $lenLoc $compTemp $j $notokb } return $newq } # quadcode::transformer method va_NonExpandedArgument -- # ................................................................................ # end of the possible static transfers. oo::define quadcode::transformer method va_NonExpandedArgument {newqVar arginfo pos argl} { upvar 1 $newqVar newq set param [lindex $arginfo $pos] set arg [lindex $argl $pos] my debug-varargs { puts "varargs: transfer actual arg [list $arg] into formal arg\ \"$param\"" } switch -exact -- [lindex $arg 0] { "literal" { } "temp" - "var" { lassign [my findDef $arg] defb defpc defstmt if {[lindex $defstmt 0] eq "expand"} { return 1 } } default { return 1 } } lappend newq $arg return 0 } # quadcode::transformer method va_MakeArgList -- # # Takes the non-fixed-position arguments of 'invokeExpanded' ................................................................................ # and 0 otherwise. oo::define quadcode::transformer method va_MakeArgList {B argl pos cfin} { my debug-varargs { puts "varargs: make arg list for [list $argl] from position $pos" } # Handle the first arg. 'listloc' will be the variable holding the # expanded arglist. 'mightThrow' will be 1 if 'listloc' # might be a non-list and 0 otherwise. if {$pos >= [llength $argl]} { my debug-varargs { puts "varargs: there are no args to list" } set listLoc "literal {}" set mightThrow 0 } else { set arg [lindex $argl $pos] my debug-varargs { puts "varargs: transfer first arg [list $arg]" } switch -exact -- [lindex $arg 0] { "literal" { set listloc [$B maketemp arglist] $B emit [list list $listloc $arg] my debug-varargs { $B log-last } set mightThrow 0 } "temp" - "var" { lassign [my findDef $arg] defb defpc defstmt if {[lindex $defstmt 0] eq "expand"} { my debug-varargs { puts " (which is expanded!)" } set listLoc [$B maketemp arglist] $B emit [list copy $listLoc [lindex $defstmt 2]] my debug-varargs { $B log-last } set mightThrow 1 } else { set intLoc [$B maketemp arglist] set listLoc [$B maketemp arglist] my debug-varargs { puts " (which is not expanded)" } $B emit [list list $listLoc $arg] my debug-varargs { $B log-last } ................................................................................ set listLoc [$B maketemp arglist] $B emit [list extractMaybe $listLoc $nloc] my debug-varargs { $B log-last } } return $mightThrow } # quadcode::transformer method va_UnpackMandatory -- # # Unpacks the mandatory args to a proc from the list created ................................................................................ # quadcode::transformer method va_UnpackOptional -- # # Emits code to unpack one optional parameter in an invokeExpanded # # Parameters: # B - Builder that is emitting the invocation sequence # newq - 'invoke' instruction under construction # j - Position of the parameter being unpacked # # Results: # Returns a two-element list giving the block number that jumps # to the finish if the parameter is not supplied and the # location of a temporary holding the unpacked value if it is. # # Side effects: # Emits code to unpack one value, or jump to the finish block if # there is nothing to unpack. oo::define quadcode::transformer method va_UnpackOptional {tempIdxVar bVar bbVar finishB compTemp listLoc lenLoc j} { upvar 1 $tempIdxVar tempIndex $bVar b $bbVar bb set pos [list literal $j] set compLoc [my newVarInstance $compTemp] set argTemp [list temp [incr tempIndex]] set argLoc1 [my newVarInstance $argTemp] set argLoc2 [my newVarInstance $argTemp] # Emit the list length comparison my va_EmitAndTrack $b bb [list ge $compLoc $pos $lenLoc] # Emit the jump to the finish block We need to make an intermediate block # because otherwise the flowgraph edge would be critical set intb [llength $bbcontent] lappend bbcontent {} lappend bbpred {} my va_EmitAndTrack $b bb [list jumpTrue [list bb $intb] $compLoc] # Create the next block and jump to it set newb [llength $bbcontent] lappend bbcontent {} lappend bbpred {} my va_EmitAndTrack $b bb [list jump [list bb $newb]] lset bbcontent $b $bb # Make the intermediate block set b $intb set bb {} my va_EmitAndTrack $b bb [list jump [list bb $finishB]] lset bbcontent $b $bb # Advance to the new block set b $newb set bb {} # Emit the 'listIndex' to unpack the arg my va_EmitAndTrack $b bb [list listIndex $argLoc1 $listLoc $pos] # Emit the 'extractMaybe' on the 'listIndex' result my va_EmitAndTrack $b bb [list extractMaybe $argLoc2 $argLoc1] # Return the place where we stored the arg return [list $intb $argLoc2] } # quadcode::transformer method va_FinishOptional -- # # Finish transmitting the args that have default values when # compiling {*} # # Parameters: # bVar - Variable in caller holding the current basic block number # bbVar - Variable in caller's scope holding basic block content # newqVar - Variable in caller's scope holding the 'invoke' # quadcode under construction # finishB - Basic block number reserved for the 'finish' block # optInfo - List of triples: fromBlock defaultValue tempLoc # giving the phi inputs for the block under construction # # Results: # None. # # Side effects: # Closes out the current basic block, opens the finish block, # and emits phi instructions into the finish block. Adds the # outputs of the phi instructions to the 'invoke' instruction # under construction. oo::define quadcode::transformer method va_FinishOptional {bVar bbVar newqVar finishB optInfo} { error "va_FinishOptional: not refactored or tested yet" upvar 1 $bVar b $bbVar bb $newqVar newq # Finish the current block and start building into 'finishB' my va_EmitAndTrack $b bb [list jump [list bb $finishB]] lset bbcontent $b $bb set bb {} set fromb $b set b $finishB # Emit the phi instructions set n 0 foreach tuple $optInfo { lassign $tuple - defaultVal tempLoc set defaultLit [list literal $defaultVal] set newTemp [my newVarInstance $tempLoc] incr n set q [list phi $newTemp] set k -1 foreach tuple2 $optInfo { lassign $tuple2 fromBlock ................................................................................ if {$k >= $n} { lappend q $tempLoc } else { lappend q $defaultLit } } lappend q [list bb $fromb] $tempLoc my va_EmitAndTrack $b bb $q lappend newq $newTemp } } # quadcode::transformer method va_DoArgs -- # # Emits code to extract the parameter sequence needed to fill '$args' # from the parameter list. # ................................................................................ # the error block if needed # # The assumption is made that the 'arglen' temporary in $B has the # length of the oo::define quadcode::transformer method va_CheckEnough {B callee minLength} { set compLoc [my newVarInstance {temp @toofew}] set lenLoc [$B gettemp arglen] # compare args provided to args needed $B emit [list gt $compLoc [list literal $minLength] $lenLoc] my debug-varargs { $B log-last } # jump to a 'wrong # args' error if wrong set errb [my va_MakeWrongArgs $B $callee] $B emit [list jumpTrue [list bb $errb] $compLoc] my debug-varargs { $B log-last } # jump to okb if right set okb [$B makeblock] $B emit [list jump [list bb $okb]] my debug-varargs { $B log-last } # return to the 'no failure' branch $B buildin $okb } # quadcode::transformer method va_CheckTooMany -- # # Emits a codeburst to check whether an 'invokeExpanded' has # too many args # # Parameters: # bVar - Variable holding the basic block number # bbVar - Variable holding the content of the current basic block # lenLoc - LLVM location holding the argument list length # compTemp - Name of a temporary to use as a comparison result # i - Index of the next unclaimed argument # errorB - Basic block number to jump to if there are too many args # # Results: # None # # Side effects: # Emits code and closes the basic block oo::define quadcode::transformer method va_CheckTooMany {bVar bbVar lenLoc compTemp i errorB} { upvar 1 $bVar b $bbVar bb set compLoc [my newVarInstance $compTemp] my va_EmitAndTrack $b bb [list gt $compLoc $lenLoc [list literal $i]] set intb [llength $bbcontent] lappend bbcontent {} lappend bbpred {} my va_EmitAndTrack $b bb [list jumpTrue [list bb $intb] $compLoc] set newb [llength $bbcontent] lappend bbcontent {} lappend bbpred {} my va_EmitAndTrack $b bb [list jump [list bb $newb]] lset bbcontent $b $bb set b $intb set bb {} my va_EmitAndTrack $b bb [list jump [list bb $errorB]] lset bbcontent $b $bb set b $newb set bb {} } # quadcode::transformer method va_MakeWrongArgs -- # # Generates code to throw the 'wrong # args' error when needed # ................................................................................ my debug-varargs { $B log-last } set errorb [my va_MakeErrorBlock $B] $B emit [list jump [list bb $errorb]] # Add phis for the error result ant the callframe to the error block set errorInPhi [$B gettemp error] $B updatephi $errorb $errorInPhi $excloc $B buildin $currentb return $wrongb } ................................................................................ set errortemp [$B maketemp error] $B emit [list phi $errortemp] my debug-varargs { $B log-last } $B buildin $currentb return } # oo::transformer method va_ConvergeErrorPath -- # # Converges the code for the error and normal paths after an 'invoke'. # # Parameters: ................................................................................ my debug-varargs { $B log-last } # Move to the finalization block, and emit phis for the callframe # and the result puts "* cfin = $cfin" $B buildin $finalb $B emit [list phi $cf \ [list bb $errorb] $cfin [list bb $normb] $normcf] my debug-varargs { $B log-last } $B emit [list phi $result \ |
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# Any leading plain arguments that do not have {*} can simply be retained # in the parameter list of [invoke]. # $pos will be the position in the parameter list of the first # parameter that needs special handling. set argl [lrange $q 4 end] set pos 0 my debug-varargs { puts "varargs: pos = $pos (of $nPlainParams)" puts " argl = $argl" } while {$pos < $nPlainParams} { if {[my va_NonExpandedArgument newq $arginfo $pos $argl]} break incr pos } my debug-varargs { puts "varargs: $b:$pc: matched $pos out of $nPlainParams\ ................................................................................ info default $callee [lindex $arginfo $i] defaultVal my debug-varargs { puts "Emit length check and extraction for optional param \ $i: [lindex $arginfo $i] (default=$defaultVal)" } lassign [my va_UnpackOptional $B $j] fromBlock argLoc lappend optInfo [list $fromBlock $defaultVal $argLoc] incr i incr j } # Close out the last basic block, switch to the 'finish' block # and emit 'phi' instructions to get the correct parameter set set newq [my va_FinishOptional $B $newq $optInfo] } # If the procedure has 'args', then fill it in with the remainder of the # arg list. if {$haveargs} { my va_DoArgs $B newq $j } else { my va_CheckTooMany $B $callee $j } return $newq } # quadcode::transformer method va_NonExpandedArgument -- # ................................................................................ # end of the possible static transfers. oo::define quadcode::transformer method va_NonExpandedArgument {newqVar arginfo pos argl} { upvar 1 $newqVar newq # If the list is exhausted, return. if {$pos >= [llength $argl]} { return 1 } # Extract the parameter and its name set param [lindex $arginfo $pos] set arg [lindex $argl $pos] my debug-varargs { puts "varargs: transfer actual arg [list $arg] into formal arg\ \"$param\"" } # Quit at the first {*} expansion or on a parameter that is not understood switch -exact -- [lindex $arg 0] { "literal" { } "temp" - "var" { lassign [my findDef $arg] defb defpc defstmt if {[lindex $defstmt 0] eq "expand"} { return 1 } } default { return 1 } } # Put the parameter on the new 'invoke' instruction lappend newq $arg return 0 } # quadcode::transformer method va_MakeArgList -- # # Takes the non-fixed-position arguments of 'invokeExpanded' ................................................................................ # and 0 otherwise. oo::define quadcode::transformer method va_MakeArgList {B argl pos cfin} { my debug-varargs { puts "varargs: make arg list for [list $argl] from position $pos" } set listLoc [$B maketemp arglist] # Handle the first arg. 'listloc' will be the variable holding the # expanded arglist. 'mightThrow' will be 1 if 'listloc' # might be a non-list and 0 otherwise. if {$pos >= [llength $argl]} { my debug-varargs { puts "varargs: there are no args to list" } $B emit [list copy $listLoc {literal {}}] my debug-varargs { $B log-last } set mightThrow 0 } else { set arg [lindex $argl $pos] my debug-varargs { puts "varargs: transfer first arg [list $arg]" } switch -exact -- [lindex $arg 0] { "literal" { $B emit [list list $listLoc $arg] my debug-varargs { $B log-last } set mightThrow 0 } "temp" - "var" { lassign [my findDef $arg] defb defpc defstmt if {[lindex $defstmt 0] eq "expand"} { my debug-varargs { puts " (which is expanded!)" } $B emit [list copy $listLoc [lindex $defstmt 2]] my debug-varargs { $B log-last } set mightThrow 1 } else { my debug-varargs { puts " (which is not expanded)" } $B emit [list list $listLoc $arg] my debug-varargs { $B log-last } ................................................................................ set listLoc [$B maketemp arglist] $B emit [list extractMaybe $listLoc $nloc] my debug-varargs { $B log-last } } my debug-varargs { puts "varargs: arg list assembled in [$B gettemp arglist]" puts " mightThrow = $mightThrow" } return $mightThrow } # quadcode::transformer method va_UnpackMandatory -- # # Unpacks the mandatory args to a proc from the list created ................................................................................ # quadcode::transformer method va_UnpackOptional -- # # Emits code to unpack one optional parameter in an invokeExpanded # # Parameters: # B - Builder that is emitting the invocation sequence # j - Position of the parameter being unpacked # # Results: # # Returns a two-element list: the block number that will jump to the # finish if there are too few arguments to match all optional # parameters, and the location of the argument if one was successfully # unpacked # # Side effects: # Emits code to unpack one value, or jump to the finish block if # there is nothing to unpack. oo::define quadcode::transformer method va_UnpackOptional {B j} { set compLoc [$B maketemp arg${j}found] $B emit [list ge $compLoc [list literal $j] [$B gettemp arglen]] my debug-varargs { $B log-last } set intb [$B makeblock] set nextb [$B makeblock] $B emit [list jumpTrue [list bb $intb] $compLoc] my debug-varargs { $B log-last } $B emit [list jump [list bb $nextb]] my debug-varargs { $B log-last } $B buildin $nextb set intLoc [$B maketemp arg$j] set argLoc [$B maketemp arg$j] $B emit [list listIndex $intLoc [$B gettemp arglist] [list literal $j]] my debug-varargs { $B log-last } $B emit [list extractMaybe $argLoc $intLoc] my debug-varargs { $B log-last } # Return the place where we stored the arg return [list $intb $argLoc] } # quadcode::transformer method va_FinishOptional -- # # Finish transmitting the args that have default values when # compiling {*} # # Parameters: # B - Builder that is emitting the quadcode invocation sequence # newq - 'invoke' instruction under construction # optInfo - List of triples: fromBlock defaultValue tempLoc # giving the phi inputs for the block under construction # # Results: # None. # # Side effects: # Closes out the current basic block, opens the finish block, # and emits phi instructions into the finish block. Adds the # outputs of the phi instructions to the 'invoke' instruction # under construction. oo::define quadcode::transformer method va_FinishOptional {B newq optInfo} { # Finish the current block and make the join point set finishB [$B makeblock] $B emit [list jump [list bb $finishB]] set fromb [$B curblock] $B buildin $finishB # Emit the phi instructions set n 0 foreach tuple $optInfo { lassign $tuple fblk defaultVal tempLoc $B buildin $fblk $B emit [list jump [list bb $finishB]] my debug-varargs { $B log-last } $B buildin $finishB set defaultLit [list literal $defaultVal] set newTemp [my newVarInstance $tempLoc] incr n set q [list phi $newTemp] set k -1 foreach tuple2 $optInfo { lassign $tuple2 fromBlock ................................................................................ if {$k >= $n} { lappend q $tempLoc } else { lappend q $defaultLit } } lappend q [list bb $fromb] $tempLoc $B emit $q my debug-varargs { $B log-last } lappend newq $newTemp } return $newq } # quadcode::transformer method va_DoArgs -- # # Emits code to extract the parameter sequence needed to fill '$args' # from the parameter list. # ................................................................................ # the error block if needed # # The assumption is made that the 'arglen' temporary in $B has the # length of the oo::define quadcode::transformer method va_CheckEnough {B callee minLength} { set currentb [$B curblock] set compLoc [my newVarInstance {temp @toofew}] set lenLoc [$B gettemp arglen] # compare args provided to args needed $B emit [list gt $compLoc [list literal $minLength] $lenLoc] my debug-varargs { $B log-last } my va_JumpTrueToWrongArgs $B $callee $compLoc return } # quadcode::transformer method va_CheckTooMany -- # # Emits a codeburst to check whether an 'invokeExpanded' has # too many args # # Parameters: # B - Builder that is emitting the quadcode sequence # callee - Name of the called procedure # maxLength - Maximum length of the arg list # # Results: # None. # # Side effects: # Emits the check. # # Results: # None # # Side effects: # Emits code and closes the basic block oo::define quadcode::transformer method va_CheckTooMany {B callee maxLength} { set compLoc [my newVarInstance {temp @toomany}] set lenLoc [$B gettemp arglen] # Compare args provided against maximum $B emit [list gt $compLoc $lenLoc [list literal $maxLength]] my debug-varargs { $B log-last } my va_JumpTrueToWrongArgs $B $callee $compLoc return } # quadcode::transformer method va_JumpTrueToWrongArgs # # Common logic for va_CheckEnough and va_CheckTooMany # # Parameters: # B - Builder that is emitting an invocation sequence. # callee - Name of the called command # compLoc - Quadcode location that contains a true value iff # the wrong number of arguments is supplied. # # Results: # None. # # Side effects: # Emits a 'jumpTrue' instruction to code that reports the wrong # number of arguments, and a 'jump' to the following block, and # builds in the following block oo::define quadcode::transformer method va_JumpTrueToWrongArgs {B callee compLoc} { set intb [$B makeblock] set okb [$B makeblock] $B emit [list jumpTrue [list bb $intb] $compLoc] my debug-varargs { $B log-last } $B emit [list jump [list bb $okb]] my debug-varargs { $B log-last } set errb [my va_MakeWrongArgs $B $callee] $B buildin $intb $B emit [list jump [list bb $errb]] my debug-varargs { $B log-last } # return to the 'no failure' branch $B buildin $okb } # quadcode::transformer method va_MakeWrongArgs -- # # Generates code to throw the 'wrong # args' error when needed # ................................................................................ my debug-varargs { $B log-last } set errorb [my va_MakeErrorBlock $B] $B emit [list jump [list bb $errorb]] # Add phis for the error result and the callframe to the error block set errorInPhi [$B gettemp error] $B updatephi $errorb $errorInPhi $excloc $B buildin $currentb return $wrongb } ................................................................................ set errortemp [$B maketemp error] $B emit [list phi $errortemp] my debug-varargs { $B log-last } $B buildin $currentb return $errorb } # oo::transformer method va_ConvergeErrorPath -- # # Converges the code for the error and normal paths after an 'invoke'. # # Parameters: ................................................................................ my debug-varargs { $B log-last } # Move to the finalization block, and emit phis for the callframe # and the result $B buildin $finalb $B emit [list phi $cf \ [list bb $errorb] $cfin [list bb $normb] $normcf] my debug-varargs { $B log-last } $B emit [list phi $result \ |