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| author | Richard Biener <rguenther@suse.de> | 2022-03-09 10:55:49 +0100 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2022-03-09 14:37:02 +0100 |
| commit | ba3ff5e35144e2afff4ccef4ccbbbbaba9870afb (patch) | |
| tree | fdf8174d9102c27fa84675b72b93098080525cd1 | |
| parent | 1c7b110e1e44da0c93d0d011f5109c5d09bf4399 (diff) | |
| download | gcc-ba3ff5e35144e2afff4ccef4ccbbbbaba9870afb.zip gcc-ba3ff5e35144e2afff4ccef4ccbbbbaba9870afb.tar.gz gcc-ba3ff5e35144e2afff4ccef4ccbbbbaba9870afb.tar.bz2 | |
middle-end/104786 - ICE with asm and VLA
The following fixes an ICE observed with a MEM_REF allows_mem asm
operand referencing a VLA. The following makes sure to not attempt
to go the temporary creation way when we cannot.
2022-03-09 Richard Biener <rguenther@suse.de>
PR middle-end/104786
* cfgexpand.cc (expand_asm_stmt): Do not generate a copy
for VLAs without an upper size bound.
* gcc.dg/pr104786.c: New testcase.
| -rw-r--r-- | gcc/cfgexpand.cc | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr104786.c | 8 |
2 files changed, 11 insertions, 1 deletions
diff --git a/gcc/cfgexpand.cc b/gcc/cfgexpand.cc index 87536ec..4f99f04 100644 --- a/gcc/cfgexpand.cc +++ b/gcc/cfgexpand.cc @@ -3297,7 +3297,9 @@ expand_asm_stmt (gasm *stmt) && GET_MODE (DECL_RTL (val)) != TYPE_MODE (type))) || ! allows_reg || is_inout - || TREE_ADDRESSABLE (type)) + || TREE_ADDRESSABLE (type) + || (!tree_fits_poly_int64_p (TYPE_SIZE (type)) + && !known_size_p (max_int_size_in_bytes (type)))) { op = expand_expr (val, NULL_RTX, VOIDmode, !allows_reg ? EXPAND_MEMORY : EXPAND_WRITE); diff --git a/gcc/testsuite/gcc.dg/pr104786.c b/gcc/testsuite/gcc.dg/pr104786.c new file mode 100644 index 0000000..3076d23 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr104786.c @@ -0,0 +1,8 @@ +/* { dg-do compile } */ +/* { dg-options "-std=gnu90" } */ + +void h(void *di, int num) +{ + char (*t)[num] = di; + __asm__ ("" : "=X"( *t)); +} |