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| author | Jakub Jelinek <jakub@redhat.com> | 2022-10-19 11:29:44 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2022-10-19 11:29:44 +0200 |
| commit | 65b98fc763d14d371fcf37a17e33519012ec2bac (patch) | |
| tree | e9961f79899f56a602bb92e27a76505844b96aba | |
| parent | 07cc4c1da1046f0ffda241d59df796417c122ff5 (diff) | |
| download | gcc-65b98fc763d14d371fcf37a17e33519012ec2bac.zip gcc-65b98fc763d14d371fcf37a17e33519012ec2bac.tar.gz gcc-65b98fc763d14d371fcf37a17e33519012ec2bac.tar.bz2 | |
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 <jakub@redhat.com>
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.
| -rw-r--r-- | gcc/expr.cc | 11 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr107262.c | 13 |
2 files changed, 22 insertions, 2 deletions
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) diff --git a/gcc/testsuite/gcc.dg/pr107262.c b/gcc/testsuite/gcc.dg/pr107262.c new file mode 100644 index 0000000..2ced047 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr107262.c @@ -0,0 +1,13 @@ +/* PR middle-end/107262 */ +/* { dg-do compile } */ +/* { dg-options "-O2 -ffast-math" } */ +/* { dg-add-options bfloat16 } */ +/* { dg-require-effective-target bfloat16_runtime } */ + +__bf16 +foo (__bf16 a) +{ + __bf16 b = 0; + b /= a; + return b; +} |