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Re: [PATCH, rtl-optimization]: Fix PR rtl-optimization/33846, ICE in trunc_int_for_mode, at explow.c:55


A couple of lines above (line 9345 in combine.c), where we have:

	case NOT:
	  /* Make this fit the case below.  */
	  varop = gen_rtx_XOR (mode, XEXP (varop, 0),
			       GEN_INT (GET_MODE_MASK (mode)));

You should try fixing this to create a CONST_VECTOR if the mode is a vector mode. I'd hope the fix is as easy as

  varop = gen_rtx_XOR (mode, XEXP (varop, 0),
                       simplify_const_unary_operation
                       (NOT, mode, CONST0_RTX (mode), mode));

Or, you could create a CONSTM1_RTX set of constants too.

Paolo

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