dist/gcc/cse.c

2089 /* Remove from the hash table any expression that is a call-clobbered
2101   /* Go through all the hard registers.  For each that might be clobbered
2106      ??? We could be more precise for partially-clobbered registers,
2107      and only invalidate values that actually occupy the clobbered part
2125   /* In the case where we have no call-clobbered hard registers in the
2127      entry that overlaps a call-clobbered register.  */
4435 	 This does nothing when a register is clobbered
4586   /* Find all regs explicitly clobbered in this insn,
6240 	      rtx clobbered = XEXP (y, 0);
6242 	      if (REG_P (clobbered)
6243 		  || GET_CODE (clobbered) == SUBREG)
6244 		invalidate (clobbered, VOIDmode);
6245 	      else if (GET_CODE (clobbered) == STRICT_LOW_PART
6246 		       || GET_CODE (clobbered) == ZERO_EXTRACT)
6247 		invalidate (XEXP (clobbered, 0), GET_MODE (clobbered));