+2010-08-20 Jakub Jelinek <jakub@redhat.com>
+
+ PR middle-end/44974
+ * builtins.c (expand_builtin): Don't optimize away
+ calls to DECL_LOOPING_CONST_OR_PURE_P builtins.
+
2010-08-20 Uros Bizjak <ubizjak@gmail.com>
* config/i386/i386.md (ashift RSP splitter): Remove splitter.
none of its arguments are volatile, we can avoid expanding the
built-in call and just evaluate the arguments for side-effects. */
if (target == const0_rtx
- && (DECL_PURE_P (fndecl) || TREE_READONLY (fndecl)))
+ && (DECL_PURE_P (fndecl) || TREE_READONLY (fndecl))
+ && !DECL_LOOPING_CONST_OR_PURE_P (fndecl))
{
bool volatilep = false;
tree arg;
2010-08-20 Jakub Jelinek <jakub@redhat.com>
+ PR middle-end/44974
+ * gcc.dg/pr44974.c: New test.
+
PR rtl-optimization/45353
* gcc.dg/pr45353.c: New test.
--- /dev/null
+/* PR middle-end/44974 */
+/* { dg-do compile } */
+/* { dg-options "-O -fno-optimize-sibling-calls" } */
+
+extern void foo (int status) __attribute__ ((__noreturn__));
+extern void bar (int status) __attribute__ ((__noreturn__));
+extern void _Exit (int status) __attribute__ ((__noreturn__));
+
+void
+foo (int status)
+{
+ _Exit (status);
+}
+
+void
+_Exit (int status)
+{
+ bar (status);
+}
+
+/* { dg-final { scan-assembler "call\[^\n\]*_Exit" { target i?86-*-* x86_64-*-* ia64-*-* sparc*-*-* } } } */
+/* { dg-final { scan-assembler "bl\[^\n\]*_Exit" { target powerpc*-*-* } } } */
+/* { dg-final { scan-assembler "brasl\[^\n\]*_Exit" { target { s390*-*-* && lp64 } } } } */