The Fortran front-end has a bug in which it uses "int" values for "size_t" parameters. I don't know why this isn't problem for all 64-bit architectures, but GCN ends up with the data in the wrong argument register and/or stack slot, and bad things happen.
This patch corrects the issue by setting the correct type. 2018-09-05 Kwok Cheung Yeung <k...@codesourcery.com> gcc/fortran/ * trans-expr.c (gfc_trans_structure_assign): Ensure that integer_zero_node is of sizetype when used as the first argument of a call to _gfortran_caf_register. * trans-intrinsic.c (conv_intrinsic_event_query): Convert computed index to a size_t type. * trans-stmt.c (gfc_trans_event_post_wait): Likewise. --- gcc/fortran/trans-expr.c | 2 +- gcc/fortran/trans-intrinsic.c | 3 ++- gcc/fortran/trans-stmt.c | 3 ++- 3 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/gcc/fortran/trans-expr.c b/gcc/fortran/trans-expr.c index 56ce98c..91be3fb 100644 --- a/gcc/fortran/trans-expr.c +++ b/gcc/fortran/trans-expr.c @@ -7729,7 +7729,7 @@ gfc_trans_structure_assign (tree dest, gfc_expr * expr, bool init, bool coarray) suffices to recognize the data as array. */ if (rank < 0) rank = 1; - size = integer_zero_node; + size = fold_convert (sizetype, integer_zero_node); desc = field; gfc_add_modify (&block, gfc_conv_descriptor_rank (desc), build_int_cst (signed_char_type_node, rank)); diff --git a/gcc/fortran/trans-intrinsic.c b/gcc/fortran/trans-intrinsic.c index b2cea93..23c13da 100644 --- a/gcc/fortran/trans-intrinsic.c +++ b/gcc/fortran/trans-intrinsic.c @@ -10732,7 +10732,8 @@ conv_intrinsic_event_query (gfc_code *code) tmp = fold_build2_loc (input_location, MULT_EXPR, integer_type_node, extent, tmp); index = fold_build2_loc (input_location, PLUS_EXPR, - integer_type_node, index, tmp); + size_type_node, index, + fold_convert (size_type_node, tmp)); if (i < ar->dimen - 1) { ubound = gfc_conv_descriptor_ubound_get (desc, gfc_rank_cst[i]); diff --git a/gcc/fortran/trans-stmt.c b/gcc/fortran/trans-stmt.c index 795d3cc..2c59675 100644 --- a/gcc/fortran/trans-stmt.c +++ b/gcc/fortran/trans-stmt.c @@ -1096,7 +1096,8 @@ gfc_trans_event_post_wait (gfc_code *code, gfc_exec_op op) tmp = fold_build2_loc (input_location, MULT_EXPR, integer_type_node, extent, tmp); index = fold_build2_loc (input_location, PLUS_EXPR, - integer_type_node, index, tmp); + size_type_node, index, + fold_convert (size_type_node, tmp)); if (i < ar->dimen - 1) { ubound = gfc_conv_descriptor_ubound_get (desc, gfc_rank_cst[i]);