Blame SOURCES/gcc48-pr79439.patch

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2017-03-01  Michael Meissner  <meissner@linux.vnet.ibm.com>
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	PR target/79439
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	* config/rs6000/predicates.md (current_file_function_operand): Do
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	not allow self calls to be local if the function is replaceable.
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	* gcc.target/powerpc/pr79439.c: New test.
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--- gcc/config/rs6000/predicates.md	(revision 245812)
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+++ gcc/config/rs6000/predicates.md	(revision 245813)
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@@ -1086,8 +1086,8 @@
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 			 && ((DEFAULT_ABI != ABI_AIX
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 			      && DEFAULT_ABI != ABI_ELFv2)
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 			     || !SYMBOL_REF_EXTERNAL_P (op)))
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-		        || (op == XEXP (DECL_RTL (current_function_decl),
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-						  0)))")))
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+		        || (op == XEXP (DECL_RTL (current_function_decl), 0)
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+			    && !decl_replaceable_p (current_function_decl)))")))
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 ;; Return 1 if this operand is a valid input for a move insn.
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 (define_predicate "input_operand"
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--- gcc/testsuite/gcc.target/powerpc/pr79439.c	(nonexistent)
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+++ gcc/testsuite/gcc.target/powerpc/pr79439.c	(revision 245813)
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@@ -0,0 +1,29 @@
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+/* { dg-do compile { target { powerpc64*-*-linux* && lp64 } } } */
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+/* { dg-options "-O2 -fpic" } */
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+
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+/* On the Linux 64-bit ABIs, we should not eliminate NOP in the 'rec' call if
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+   -fpic is used because rec can be interposed at link time (since it is
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+   external), and the recursive call should call the interposed function.  The
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+   Linux 32-bit ABIs do not require NOPs after the BL instruction.  */
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+
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+int f (void);
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+
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+void
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+g (void)
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+{
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+}
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+
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+int
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+rec (int a)
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+{
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+  int ret = 0;
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+  if (a > 10 && f ())
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+    ret += rec (a - 1);
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+  g ();
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+  return a + ret;
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+}
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+
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+/* { dg-final { scan-assembler-times {\mbl f\M}   1 } } */
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+/* { dg-final { scan-assembler-times {\mbl g\M}   2 } } */
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+/* { dg-final { scan-assembler-times {\mbl rec\M} 1 } } */
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+/* { dg-final { scan-assembler-times {\mnop\M}    4 } } */