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|
Fix jump table support. currently it uses 64bit absolute address.
gcc uses gprel32. This way I won't keep fighting Evan as he keeps
breaking 64bit entries in jump tables...
#include <string.h>
#include <setjmp.h>
int main(int x, char** y)
{
char* foo;
switch(x) {
case 1:
foo = "1";
break;
case 2:
foo = "2";
break;
case 3:
foo = "3";
break;
case 4:
foo = "4";
break;
case 5:
foo = "5";
break;
case 6:
foo = "6";
break;
case 7:
foo = "7";
break;
case 8:
foo = "8";
break;
};
print(foo);
return 0;
}
.set noreorder
.set volatile
.set noat
.set nomacro
.section .rodata.str1.1,"aMS",@progbits,1
$LC6:
.ascii "7\0"
$LC7:
.ascii "8\0"
$LC0:
.ascii "1\0"
$LC1:
.ascii "2\0"
$LC2:
.ascii "3\0"
$LC3:
.ascii "4\0"
$LC4:
.ascii "5\0"
$LC5:
.ascii "6\0"
.text
.align 2
.align 4
.globl main
.ent main
main:
.frame $30,16,$26,0
.mask 0x4000000,-16
ldah $29,0($27) !gpdisp!1
lda $29,0($29) !gpdisp!1
$main..ng:
zapnot $16,15,$16
lda $30,-16($30)
cmpule $16,8,$1
stq $26,0($30)
.prologue 1
beq $1,$L2
ldah $6,$L11($29) !gprelhigh
lda $5,$L11($6) !gprellow
s4addq $16,$5,$0
ldl $2,0($0)
addq $29,$2,$3
jmp $31,($3),$L2
.section .rodata
.align 2
.align 2
$L11:
.gprel32 $L2
.gprel32 $L3
.gprel32 $L4
.gprel32 $L5
.gprel32 $L6
.gprel32 $L7
.gprel32 $L8
.gprel32 $L9
.gprel32 $L10
.text
$L9:
ldah $20,$LC6($29) !gprelhigh
lda $4,$LC6($20) !gprellow
.align 4
$L2:
mov $4,$16
ldq $27,print($29) !literal!2
jsr $26,($27),print !lituse_jsr!2
ldah $29,0($26) !gpdisp!3
mov $31,$0
bis $31,$31,$31
lda $29,0($29) !gpdisp!3
ldq $26,0($30)
lda $30,16($30)
ret $31,($26),1
$L10:
ldah $21,$LC7($29) !gprelhigh
lda $4,$LC7($21) !gprellow
br $31,$L2
$L3:
ldah $7,$LC0($29) !gprelhigh
lda $4,$LC0($7) !gprellow
br $31,$L2
$L4:
ldah $8,$LC1($29) !gprelhigh
lda $4,$LC1($8) !gprellow
br $31,$L2
$L5:
ldah $16,$LC2($29) !gprelhigh
lda $4,$LC2($16) !gprellow
br $31,$L2
$L6:
ldah $17,$LC3($29) !gprelhigh
lda $4,$LC3($17) !gprellow
br $31,$L2
$L7:
ldah $18,$LC4($29) !gprelhigh
lda $4,$LC4($18) !gprellow
br $31,$L2
$L8:
ldah $19,$LC5($29) !gprelhigh
lda $4,$LC5($19) !gprellow
br $31,$L2
.end main
.section .note.GNU-stack,"",@progbits
.ident "GCC: (GNU) 3.4.4 20050314 (prerelease) (Debian 3.4.3-13)"
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Fix Ordered/Unordered FP stuff
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
improve bytezap opertunities
ulong %foo(ulong %y) {
entry:
%tmp = and ulong %y, 65535
%tmp2 = shr ulong %tmp, ubyte 3
ret ulong %tmp2
}
compiles to a 3 instruction sequence without instcombine
zapnot $16,3,$0
srl $0,3,$0
ret $31,($26),1
After instcombine you get
ulong %foo(ulong %y) {
entry:
%tmp = shr ulong %y, ubyte 3 ; <ulong> [#uses=1]
%tmp2 = and ulong %tmp, 8191 ; <ulong> [#uses=1]
ret ulong %tmp2
}
which compiles to
lda $0,8191($31)
srl $16,3,$1
and $1,$0,$0
ret $31,($26),1
|
