$T_DOT_WORD = '\.(long|value|byte|zero)';
$T_DOT_GLOBAL = '\.global';
$T_HDR_literal = "\.section\t\.rodata\n";
- $T_HDR_misc = "\.text\n\t\.align 8\n";
+ $T_HDR_misc = "\.text\n\t\.align 16\n"; # May contain code; align like 'entry'
$T_HDR_data = "\.data\n\t\.align 8\n";
$T_HDR_rodata = "\.section\t\.rodata\n\t\.align 8\n";
$T_HDR_closure = "\.data\n\t\.align 8\n";
$p =~ s/^\t\.save ar\.pfs, r\d+\n\talloc r\d+ = ar\.pfs, 0, 3[12], \d+, 0\n//;
$p =~ s/^\t\.fframe \d+\n\tadds r12 = -\d+, r12\n//;
$p =~ s/^\t\.save rp, r\d+\n\tmov r\d+ = b0\n//;
- $p =~ s/^\t\.(mii|mmi)\n//g; # bundling is no longer sensible
+
+ # Remove .proc and .body directives
+ $p =~ s/^\t\.proc [a-zA-Z0-9_#.]+\n//;
+ $p =~ s/^\t\.body\n//;
+ # If there's a label, move it to the body
+ if ($p =~ /^[a-zA-Z0-9#.]+:\n/) {
+ $p = $` . $';
+ $r = $& . $r;
+ }
+ # Remove floating-point spill instructions. This is actually a bad
+ # thing to remove, because we will be putting junk into the floating-point
+ # registers and this will be visible to the caller.
+ # Only fp registers 2-5 and 16-31 may be spilled.
+ if ($p =~ s/^\tstf\.spill \[r1[4-9]\] = f([2-5]|1[6-9]|2[0-9]|30|31)(, [0-9]+)?\n//g) {
+ # Being paranoid, only try to remove these if we saw a spill
+ # operation.
+ $p =~ s/^\tmov r1[4-9] = r12\n//;
+ $p =~ s/^\tadds r1[4-9] = -[0-9]+, r12\n//g;
+ $p =~ s/^\t\.save\.f 0x[0-9a-fA-F]\n//g;
+ }
+
+ $p =~ s/^\tnop\.[mifb]\s+0\n//g; # remove nop instructions
+ $p =~ s/^\t\.(mii|mmi|mfi)\n//g; # bundling is no longer sensible
$p =~ s/^\t;;\n//g; # discard stops
$p =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
- # GCC 3.3 saves r1 in the prologue, move this to the body
- if ($p =~ /^\tmov r\d+ = r1\n/) {
- $p = $` . $';
- $r = $& . $r;
- }
+ # GCC 3.3 saves r1 in the prologue, move this to the body
+ if ($p =~ /^\tmov r\d+ = r1\n/) {
+ $p = $` . $';
+ $r = $& . $r;
+ }
+ # GCC 3.2 saves pr in the prologue, move this to the body
+ if ($p =~ /^\tmov r\d+ = pr\n/) {
+ $p = $` . $';
+ $r = $& . $r;
+ }
} elsif ($TargetPlatform =~ /^m68k-/) {
$p =~ s/^\tlink a6,#-?\d.*\n//;
$p =~ s/^\tpea a6@\n\tmovel sp,a6\n//;
# toss all epilogue stuff; again, paranoidly
if ( $c =~ /--- END ---/ ) {
if (($r, $e) = split(/--- END ---/, $c)) {
+ # rtail holds code that is after the epilogue in the assembly-code
+ # layout and should not be filtered as part of the epilogue.
+ $rtail = "";
if ($TargetPlatform =~ /^i386-/) {
$e =~ s/^\tret\n//;
$e =~ s/^\tpopl\s+\%edi\n//;
$e =~ s/^\taddl\s+\$\d+,\s*\%esp\n//;
$e =~ s/^\tsubl\s+\$-\d+,\s*\%esp\n//;
} elsif ($TargetPlatform =~ /^ia64-/) {
+ # GCC may have put the function's epilogue code in the _middle_
+ # of the function. We try to detect that here and extract the
+ # code that belongs to the body of the function. We'll put that
+ # code back after cleaning up the epilogue.
+ # The epilogue is first split into:
+ # $e, the epilogue code (up to the return instruction)
+ # $rtail, the rest of the function body
+ # $edir, the directives following the function
+ # (everything starting with .endp)
+ # The return instruction and endp directive are stripped in the
+ # process.
+ if (!(($e, $rtail) = split(/^\tbr\.ret\.sptk\.many b0\n/, $e))) {
+ die "Epilogue doesn't seem to have one return instruction: $e\n";
+ }
+ if (!(($rtail, $edir) = split(/^\t\.endp [a-zA-Z0-9_#.]+\n/, $rtail))) {
+ die "Epilogue doesn't seem to have one endp directive: $e\n";
+ }
+ # print STDERR "Epilogue: $e\n";
+ # print STDERR "Code tail: $rtail\n";
+ # print STDERR "Directives: $edir\n";
+
+ # If a return value is saved here, move it to the function body
+ if ($e =~ /^\tmov r8 = r14\n/) {
+ $e = $` . $';
+ $r = $r . $&;
+ }
+
+ # Remove floating-point fill instructions. This is actually a bad
+ # thing to remove, because we will be putting junk into the
+ # floating-point registers and this will be visible to the caller.
+ # Only fp registers 2-5 and 16-31 may be restored.
+ if ($e =~ s/^\tldf\.fill f([2-5]|1[6-9]|2[0-9]|30|31) = \[r1[4-9]\](, [0-9]+)?\n//g) {
+ # Being paranoid, only try to remove this if we saw a fill
+ # operation.
+ $e =~ s/^\tadds r1[4-9] = [0-9]+, r12//g;
+ }
+
+ $e =~ s/^\tnop\.[mifb]\s+0\n//g; # remove nop instructions
+
$e =~ s/^\tmov ar\.pfs = r\d+\n//;
$e =~ s/^\tmov b0 = r\d+\n//;
$e =~ s/^\t\.restore sp\n\tadds r12 = \d+, r12\n//;
- $e =~ s/^\tbr\.ret\.sptk\.many b0\n//;
- $e =~ s/^\t\.(mii|mmi|mib)\n//g; # bundling is no longer sensible
- $e =~ s/^\t;;\n//g; # discard stops - stop at end of body is sufficient
- $e =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
+ #$e =~ s/^\tbr\.ret\.sptk\.many b0\n//; # already removed
+ $e =~ s/^\t\.(mii|mmi|mfi|mib)\n//g; # bundling is no longer sensible
+ $e =~ s/^\t;;\n//g; # discard stops - stop at end of body is sufficient
+ $e =~ s/^\t\/\/.*\n//g; # gcc inserts timings in // comments
+
+ # Tack edir onto the end of rtail. Some of the directives in
+ # edir are relevant to the next chunk.
+ $rtail .= $edir;
} elsif ($TargetPlatform =~ /^m68k-/) {
$e =~ s/^\tunlk a6\n//;
$e =~ s/^\trts\n//;
print STDERR "WARNING: Epilogue junk?: $e\n" if $e =~ /^\t\s*[^\.\s\n]/;
# glue together what's left
- $c = $r . $e;
+ $c = $r . $e . $rtail;
$c =~ s/\n\t\n/\n/; # junk blank line
}
}
# IA64: mangle tailcalls into jumps here
if ($TargetPlatform =~ /^ia64-/) {
- while ($c =~ s/^\tbr\.call\.sptk\.many b0 = (.*)\n(?:^\.L([0-9]*):\n)?(?:\t;;\n)?(?:\tmov r1 = r\d+\n)?(?:\t;;\n)?\t--- TAILCALL ---\n(?:\t;;\n\tbr \.L\d+\n)?/\tbr\.few $1\n/) {
+ # Example of what is mangled:
+ # br.call.sptk.many b0 = b6
+ #.L211
+ # ;;
+ # .mmi
+ # mov r1 = r32
+ # ;;
+ # nop.m 0
+ # nop.i 0
+ # ;;
+ # --- TAILCALL --
+ # ;;
+ #.L123
+ while ($c =~ s/^\tbr\.call\.sptk\.many b0 = (.*)\n(?:^\.L([0-9]*):\n)?(?:\t;;\n)?(?:\t\.(?:mii|mmi|mfi|mfb)\n)?(?:\tmov r1 = r\d+\n)?(?:\t;;\n)?(?:\tnop\.[mifb] \d+\n)*\t--- TAILCALL ---\n(?:\t;;\n\tbr \.L\d+\n)?/\tbr\.few $1\n/) {
# Eek, the gcc optimiser is getting smarter... if we see a jump to the --- TAILCALL ---
# marker then we reapply the substitution at the source sites
$c =~ s/^\tbr \.L$2\n/\t--- TAILCALL ---\n/g if ($2);
}
+
+ # Verify that all instances of TAILCALL were processed
+ if ($c =~ /^\t--- TAILCALL ---\n/) {
+ die "Unmangled TAILCALL tokens remain after mangling"
+ }
}
# MIPS: that may leave some gratuitous asm macros around
projects / ghc-hetmet.git / commitdiff