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i386 fix
- To: gcc-patches at gcc dot gnu dot org, rth at cygnus dot com
- Subject: i386 fix
- From: Jan Hubicka <jh at suse dot cz>
- Date: Fri, 21 Jul 2000 01:35:33 +0200
Hi
This patch marks dirflag and fp status word as fixed regsiters. This
prevents gcc from saving and loading them across the function calls.
Perhaps I am missing something here, because I think the flags register
should be fixed too, but it isn't and making it so produces longer executable.
Anyway this patch fixed crash while compiling spec benchmarks.
Pá červenec 21 01:32:44 CEST 2000 Jan Hubicka <jh@suse.cz>
* i386.h (FIXED_REGS): flags and fpsr is fixed.
*** i386.h.old Mon Jul 10 15:51:23 2000
--- i386.h Thu Jul 20 23:16:00 2000
*************** extern int ix86_arch;
*** 629,635 ****
/*ax,dx,cx,bx,si,di,bp,sp,st,st1,st2,st3,st4,st5,st6,st7*/ \
{ 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, \
/*arg,flags,fpsr,dir,frame*/ \
! 1, 0, 0, 0, 1, \
/*xmm0,xmm1,xmm2,xmm3,xmm4,xmm5,xmm6,xmm7*/ \
0, 0, 0, 0, 0, 0, 0, 0, \
/*mmx0,mmx1,mmx2,mmx3,mmx4,mmx5,mmx6,mmx7*/ \
--- 629,635 ----
/*ax,dx,cx,bx,si,di,bp,sp,st,st1,st2,st3,st4,st5,st6,st7*/ \
{ 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, \
/*arg,flags,fpsr,dir,frame*/ \
! 1, 0, 1, 1, 1, \
/*xmm0,xmm1,xmm2,xmm3,xmm4,xmm5,xmm6,xmm7*/ \
0, 0, 0, 0, 0, 0, 0, 0, \
/*mmx0,mmx1,mmx2,mmx3,mmx4,mmx5,mmx6,mmx7*/ \