Hi,
This patches fixes one of the problems noted in PR d/87824, where
exception chaining does not work as per expected semantics if
-forder-blocks-and-partition is enabled on i386.
Having it default off if not explicitly given seems the most
reasonable thing to do, as there's no alternative way to determine if
two in-flight exceptions should be chained at run-time if this
optimization is turned on.
Bootstrapped and tested on x86_64-linux-gnu /
RUNTESTFLAGS="--target_board=unix/-m32"
Committed to trunk as r267985.
--
Iain
---
gcc/d/ChangeLog:
2019-01-16 Iain Buclaw <ibuc...@gdcproject.org>
PR d/87824
* d-lang.cc (d_post_options): Disable implicit
-forder-blocks-and-partition.
---
diff --git a/gcc/d/d-lang.cc b/gcc/d/d-lang.cc
index 109bf4bf139..b53e56e65a2 100644
--- a/gcc/d/d-lang.cc
+++ b/gcc/d/d-lang.cc
@@ -725,6 +725,12 @@ d_post_options (const char ** fn)
global.params.useSwitchError = false;
}
+ /* Turn off partitioning unless it was explicitly requested, as it doesn't
+ work with D exception chaining, where EH handler uses LSDA to determine
+ whether two thrown exception are in the same context. */
+ if (!global_options_set.x_flag_reorder_blocks_and_partition)
+ global_options.x_flag_reorder_blocks_and_partition = 0;
+
/* Error about use of deprecated features. */
if (global.params.useDeprecated == DIAGNOSTICinform
&& global.params.warnings == DIAGNOSTICerror)
