From: Richard Kenner <kenner@gcc.gnu.org>
Date: Fri, 28 Jul 1995 13:39:56 +0000 (-0400)
Subject: (DO_GLOBAL_DTORS_BODY): Use an asm statement to keep the optimizer
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=185496bb2b6bd071b15c42c681b0c3d60390bce0;p=gcc.git

(DO_GLOBAL_DTORS_BODY): Use an asm statement to keep the optimizer
from deleting an assignment that it is dead.

From-SVN: r10187
---

diff --git a/gcc/config/pa/pa.h b/gcc/config/pa/pa.h
index 3f1504b02b3..485dbbce1a8 100644
--- a/gcc/config/pa/pa.h
+++ b/gcc/config/pa/pa.h
@@ -2190,13 +2190,17 @@ extern void hppa_encode_label ();
 #endif
 
 /* We want __gcc_plt_call to appear in every program built by
-   gcc, so we make a reference to it out of __main.  */
+   gcc, so we make a reference to it out of __main.
+   We use the asm statement to fool the optimizer into not
+   removing the dead (but important) initialization of
+   REFERENCE.  */
+
 #define DO_GLOBAL_DTORS_BODY \
 do { \
   extern void __gcc_plt_call (); \
   void (*reference)() = &__gcc_plt_call; \
   func_ptr *p; \
+  __asm__ ("" : : "r" (reference)); \
   for (p = __DTOR_LIST__ + 1; *p; ) \
     (*p++) (); \
 } while (0)
-