Re: gcc 2.1 bug with frame ptr handling

Thread View: gnu.gcc.bug

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1 total messages Started by Jim Wilson Wed, 15 Apr 1992 23:53

#432

Author: Jim Wilson
Date: Wed, 15 Apr 1992 23:53

20 lines
866 bytes

	The code below on a sparc produces bad code when no opimization is
	turned on---note that it uses %fp *after* it's been zero'd out.  A

	register long int sp asm("%sp"), fp asm("%fp");
	foo ()
	{
	  int a;
	  fp = 0;
	  a = ((int *)sp)[4];
	  return a;
	}

You can't have an `auto' variable if there is no frame pointer to access
it off of.

I suggest adding `register' (or `static') to a's declaration.  This solves
the problem very nicely.

Jim
wilson@cygnus.com

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