* [COMMITTED] ada: Suppress warning about Subprogram_Variant failing at run time
@ 2023-05-23 8:07 Marc Poulhiès
0 siblings, 0 replies; only message in thread
From: Marc Poulhiès @ 2023-05-23 8:07 UTC (permalink / raw)
To: gcc-patches; +Cc: Piotr Trojanek
From: Piotr Trojanek <trojanek@adacore.com>
Warning about check failing at run time is likely spurious for mutually
recursive subprograms with multiple variant clauses. These will be
non-trivial to detect, so we simply suppress the warning altogether for
all subprogram variants.
gcc/ada/
* exp_prag.adb (Expand_Pragma_Check): Suppress warning for checks of
subprogram variants.
Tested on x86_64-pc-linux-gnu, committed on master.
---
gcc/ada/exp_prag.adb | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/gcc/ada/exp_prag.adb b/gcc/ada/exp_prag.adb
index ceb27848dad..c6b3bed5425 100644
--- a/gcc/ada/exp_prag.adb
+++ b/gcc/ada/exp_prag.adb
@@ -564,6 +564,13 @@ package body Exp_Prag is
then
null;
+ -- For Subprogram_Variant suppress the warning altogether, because
+ -- for mutually recursive subprograms with multiple variant clauses
+ -- some of the clauses might have expressions that are only meant for
+ -- verification and would always fail when executed.
+
+ elsif Nam = Name_Subprogram_Variant then
+ null;
elsif Nam = Name_Assert then
Error_Msg_N ("?.a?assertion will fail at run time", N);
else
--
2.40.0
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2023-05-23 8:07 [COMMITTED] ada: Suppress warning about Subprogram_Variant failing at run time Marc Poulhiès
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