From: Martin Liska Date: Thu, 28 Jul 2016 08:45:29 +0000 (+0200) Subject: Introduce no_profile_instrument_function attribute X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1225d6b1134b5eb31bcb592ac46a4d479dcb62b1;p=gcc.git Introduce no_profile_instrument_function attribute PR gcov-profile/68025 * tree-profile.c (tree_profiling): Respect no_profile_instrument_function attribute. * doc/extend.texi: Document no_profile_instrument_function attribute. PR gcov-profile/68025 * c-common.c (handle_no_profile_instrument_function_attribute): PR gcov-profile/68025 * gcc.dg/no_profile_instrument_function-attr-1.c: New test. From-SVN: r238811 --- diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 919f3f8bacb..7e3ac320cf0 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,11 @@ +2016-07-28 Martin Liska + + PR gcov-profile/68025 + * tree-profile.c (tree_profiling): Respect + no_profile_instrument_function attribute. + * doc/extend.texi: Document no_profile_instrument_function + attribute. + 2016-07-28 Martin Liska PR rtl-optimization/70944 diff --git a/gcc/c-family/ChangeLog b/gcc/c-family/ChangeLog index 34c65ecc7f8..10073406963 100644 --- a/gcc/c-family/ChangeLog +++ b/gcc/c-family/ChangeLog @@ -1,3 +1,8 @@ +2016-07-28 Martin Liska + + PR gcov-profile/68025 + * c-common.c (handle_no_profile_instrument_function_attribute): + 2016-07-27 Bernd Edlinger * c-common.c (check_user_alignment): Use LOG2_BITS_PER_UNIT instead of diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c index 38a7b2e383d..16e3965cbd0 100644 --- a/gcc/c-family/c-common.c +++ b/gcc/c-family/c-common.c @@ -353,6 +353,8 @@ static tree handle_tls_model_attribute (tree *, tree, tree, int, bool *); static tree handle_no_instrument_function_attribute (tree *, tree, tree, int, bool *); +static tree handle_no_profile_instrument_function_attribute (tree *, tree, + tree, int, bool *); static tree handle_malloc_attribute (tree *, tree, tree, int, bool *); static tree handle_returns_twice_attribute (tree *, tree, tree, int, bool *); static tree handle_no_limit_stack_attribute (tree *, tree, tree, int, @@ -717,6 +719,9 @@ const struct attribute_spec c_common_attribute_table[] = { "no_instrument_function", 0, 0, true, false, false, handle_no_instrument_function_attribute, false }, + { "no_profile_instrument_function", 0, 0, true, false, false, + handle_no_profile_instrument_function_attribute, + false }, { "malloc", 0, 0, true, false, false, handle_malloc_attribute, false }, { "returns_twice", 0, 0, true, false, false, @@ -8293,6 +8298,22 @@ handle_no_instrument_function_attribute (tree *node, tree name, return NULL_TREE; } +/* Handle a "no_profile_instrument_function" attribute; arguments as in + struct attribute_spec.handler. */ + +static tree +handle_no_profile_instrument_function_attribute (tree *node, tree name, tree, + int, bool *no_add_attrs) +{ + if (TREE_CODE (*node) != FUNCTION_DECL) + { + warning (OPT_Wattributes, "%qE attribute ignored", name); + *no_add_attrs = true; + } + + return NULL_TREE; +} + /* Handle a "malloc" attribute; arguments as in struct attribute_spec.handler. */ diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index ad8898c4485..70636c1bf4f 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -2853,6 +2853,12 @@ If @option{-finstrument-functions} is given, profiling function calls are generated at entry and exit of most user-compiled functions. Functions with this attribute are not so instrumented. +@item no_profile_instrument_function +@cindex @code{no_profile_instrument_function} function attribute +The @code{no_profile_instrument_function} attribute on functions is used +to inform the compiler that it should not process any profile feedback based +optimization code instrumentation. + @item no_reorder @cindex @code{no_reorder} function attribute Do not reorder functions or variables marked @code{no_reorder} diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 4becb4afcd1..6123f100dad 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2016-07-28 Martin Liska + + PR gcov-profile/68025 + * gcc.dg/no_profile_instrument_function-attr-1.c: New test. + 2016-07-28 Martin Liska * g++.dg/vect/pr70944.cc: New test. diff --git a/gcc/testsuite/gcc.dg/no_profile_instrument_function-attr-1.c b/gcc/testsuite/gcc.dg/no_profile_instrument_function-attr-1.c new file mode 100644 index 00000000000..c93d1718b64 --- /dev/null +++ b/gcc/testsuite/gcc.dg/no_profile_instrument_function-attr-1.c @@ -0,0 +1,23 @@ +/* { dg-options "-O2 -fprofile-generate -fdump-tree-optimized" } */ + +__attribute__ ((no_profile_instrument_function)) +int foo() +{ + return 0; +} + +__attribute__ ((no_profile_instrument_function)) +int bar() +{ + return 1; +} + +int main () +{ + return foo (); +} + +/* { dg-final { scan-tree-dump-times "__gcov0\\.main.* = PROF_edge_counter" 1 "optimized"} } */ +/* { dg-final { scan-tree-dump-times "__gcov_indirect_call_profiler_v2" 1 "optimized" } } */ +/* { dg-final { scan-tree-dump-times "__gcov_time_profiler" 1 "optimized" } } */ +/* { dg-final { scan-tree-dump-times "__gcov_init" 1 "optimized" } } */ diff --git a/gcc/tree-profile.c b/gcc/tree-profile.c index 1f3a726988a..39fe15fae9b 100644 --- a/gcc/tree-profile.c +++ b/gcc/tree-profile.c @@ -524,6 +524,9 @@ tree_profiling (void) if (DECL_SOURCE_LOCATION (node->decl) == BUILTINS_LOCATION) continue; + if (lookup_attribute ("no_profile_instrument_function", + DECL_ATTRIBUTES (node->decl))) + continue; /* Do not instrument extern inline functions when testing coverage. While this is not perfectly consistent (early inlined extern inlines will get acocunted), testsuite expects that. */