From 1e20cd1b583347cb2ea8591a45d99df143f7c41a Mon Sep 17 00:00:00 2001 From: Harald Anlauf Date: Sun, 24 May 2020 21:35:04 +0200 Subject: [PATCH] PR fortran/95106 - truncation of long symbol names with EQUIVALENCE For long module names, the generated name-mangled symbol was truncated, leading to bogus warnings about COMMON block mismatches. Provide sufficiently large temporaries. gcc/fortran/ 2020-05-24 Harald Anlauf PR fortran/95106 * trans-common.c (gfc_sym_mangled_common_id): Enlarge temporaries for name-mangling. gcc/testsuite/ 2020-05-24 Harald Anlauf PR fortran/95106 * gfortran.dg/equiv_11.f90: New test. --- gcc/fortran/trans-common.c | 5 +++-- gcc/testsuite/gfortran.dg/equiv_11.f90 | 12 ++++++++++++ 2 files changed, 15 insertions(+), 2 deletions(-) create mode 100644 gcc/testsuite/gfortran.dg/equiv_11.f90 diff --git a/gcc/fortran/trans-common.c b/gcc/fortran/trans-common.c index 24d842d4da7f..1acc336eacfe 100644 --- a/gcc/fortran/trans-common.c +++ b/gcc/fortran/trans-common.c @@ -242,8 +242,9 @@ static tree gfc_sym_mangled_common_id (gfc_common_head *com) { int has_underscore; - char mangled_name[GFC_MAX_MANGLED_SYMBOL_LEN + 1]; - char name[GFC_MAX_SYMBOL_LEN + 1]; + /* Provide sufficient space to hold "symbol.eq.1234567890__". */ + char mangled_name[GFC_MAX_MANGLED_SYMBOL_LEN + 1 + 16]; + char name[GFC_MAX_SYMBOL_LEN + 1 + 16]; /* Get the name out of the common block pointer. */ strcpy (name, com->name); diff --git a/gcc/testsuite/gfortran.dg/equiv_11.f90 b/gcc/testsuite/gfortran.dg/equiv_11.f90 new file mode 100644 index 000000000000..0f4a1ab5c320 --- /dev/null +++ b/gcc/testsuite/gfortran.dg/equiv_11.f90 @@ -0,0 +1,12 @@ +! { dg-do compile } +! { dg-options "-fsecond-underscore" } +! PR fortran/95106 + +module m2345678901234567890123456789012345678901234567890123456789_123 + implicit none + real :: a(4), u(3,2) + real :: b(4), v(4,2) + equivalence (a(1),u(1,1)), (b(1),v(1,1)) +end +! { dg-final { scan-assembler {m2345678901234567890123456789012345678901234567890123456789_123.eq.0__} } } +! { dg-final { scan-assembler {m2345678901234567890123456789012345678901234567890123456789_123.eq.1__} } } -- 2.47.2