From f507a0704432f434b19063ced39f4e5cba986a5d Mon Sep 17 00:00:00 2001 From: Richard Kenner Date: Mon, 10 Apr 1995 07:57:09 -0400 Subject: [PATCH] (simplify_set): Don't move a SUBREG to dest if it is changing the size of a hard reg in CLASS_CANNOT_CHANGE_SIZE. From-SVN: r9346 --- gcc/combine.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/gcc/combine.c b/gcc/combine.c index 48e5a87c2ac..2bb00d41bfd 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -4334,6 +4334,14 @@ simplify_set (x) && (GET_MODE_SIZE (GET_MODE (src)) < GET_MODE_SIZE (GET_MODE (SUBREG_REG (src)))) #endif +#ifdef CLASS_CANNOT_CHANGE_SIZE + && ! (GET_CODE (dest) == REG && REGNO (dest) < FIRST_PSEUDO_REGISTER + && (TEST_HARD_REG_BIT + (reg_class_contents[(int) CLASS_CANNOT_CHANGE_SIZE], + REGNO (dest))) + && (GET_MODE_SIZE (GET_MODE (src)) + != GET_MODE_SIZE (GET_MODE (SUBREG_REG (src))))) +#endif && (GET_CODE (dest) == REG || (GET_CODE (dest) == SUBREG && GET_CODE (SUBREG_REG (dest)) == REG))) -- 2.30.2