From 65b98fc763d14d371fcf37a17e33519012ec2bac Mon Sep 17 00:00:00 2001 From: Jakub Jelinek Date: Wed, 19 Oct 2022 11:29:44 +0200 Subject: expr: Fix ICE on BFmode -> SFmode conversion of constant [PR107262] I forgot to handle the case where lowpart_subreg returns a VOIDmode CONST_INT, in that case convert_mode_scalar obviously doesn't work. The following patch fixes that. 2022-10-19 Jakub Jelinek PR middle-end/107262 * expr.cc (convert_mode_scalar): For BFmode -> SFmode conversions of constants, use simplify_unary_operation if fromi has VOIDmode instead of recursive convert_mode_scalar. * gcc.dg/pr107262.c: New test. --- gcc/expr.cc | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) (limited to 'gcc/expr.cc') diff --git a/gcc/expr.cc b/gcc/expr.cc index 4c892d6..efe387e 100644 --- a/gcc/expr.cc +++ b/gcc/expr.cc @@ -416,8 +416,15 @@ convert_mode_scalar (rtx to, rtx from, int unsignedp) rtx tof = NULL_RTX; if (fromi) { - rtx toi = gen_reg_rtx (toi_mode); - convert_mode_scalar (toi, fromi, 1); + rtx toi; + if (GET_MODE (fromi) == VOIDmode) + toi = simplify_unary_operation (ZERO_EXTEND, toi_mode, + fromi, fromi_mode); + else + { + toi = gen_reg_rtx (toi_mode); + convert_mode_scalar (toi, fromi, 1); + } toi = maybe_expand_shift (LSHIFT_EXPR, toi_mode, toi, GET_MODE_PRECISION (to_mode) -- cgit v1.1