Fix PowerPC tests in PR 81535.

gcc/testsuite/

2018-02-16  Yury Gribov  <tetra2005@gmail.com>

	PR target/81535
	* gcc.dg/pr56727-1.c: Prevent tailcalls and update for powerpc*-*-*.
	* gcc.dg/pr56727-2.c: Ditto.
	* gcc.target/powerpc/pr79439.c: Renamed to...
	* gcc.target/powerpc/pr79439-1.c: ...this.
	* gcc.target/powerpc/pr79439-2.c: New test.
	* gcc.target/powerpc/pr79439-3.c: New test.

From-SVN: r257760

gcc/testsuite/ChangeLog

+2018-02-16  Yury Gribov  <tetra2005@gmail.com>
+
+	PR target/81535
+	* gcc.dg/pr56727-1.c: Prevent tailcalls and update for powerpc*-*-*.
+	* gcc.dg/pr56727-2.c: Ditto.
+	* gcc.target/powerpc/pr79439.c: Renamed to...
+	* gcc.target/powerpc/pr79439-1.c: ...this.
+	* gcc.target/powerpc/pr79439-2.c: New test.
+	* gcc.target/powerpc/pr79439-3.c: New test.
+
 2018-02-16  Will Schmidt  <will_schmidt@vnet.ibm.com>
 
 	target/pr84371

gcc/testsuite/gcc.dg/pr56727-1.c

 /* { dg-do compile { target fpic } } */
 /* { dg-options "-O2 -fPIC" } */
-/* { dg-final { scan-assembler-not "@(PLT|plt)" { target i?86-*-* x86_64-*-* powerpc*-*-* } } } */
 
 #define define_func(type) \
   void f_ ## type (type b) { f_ ## type (0); } \
@@ -21,3 +20,7 @@ int __attribute__((noinline, noclone)) foo_noinline(int n)
 {
   return (n == 1 || n == 2) ? 1 : foo_noinline(n-1) * foo_noinline(n-2);
 }
+
+/* { dg-final { scan-assembler-not "@(PLT|plt)" { target i?86-*-* x86_64-*-* } } } */
+/* { dg-final { scan-assembler-not "@(PLT|plt)" { target { powerpc*-*-* && ilp32 } } } } */
+/* { dg-final { scan-assembler-not "bl \[a-z_\]*\n\\s*nop" { target { powerpc*-*-* && lp64 } } } } */

gcc/testsuite/gcc.dg/pr56727-2.c

 /* { dg-do compile { target fpic } } */
 /* { dg-options "-O2 -fPIC" } */
 /* { dg-require-alias "" } */
-/* { dg-final { scan-assembler "@(PLT|plt)" { target i?86-*-* x86_64-*-* powerpc*-*-linux* } } } */
 
 __attribute__((noinline, noclone))
 void f (short b)
 {
+  __builtin_setjmp (0);  /* Prevent tailcall */
   f (0);
 }
 
@@ -15,3 +15,7 @@ void h ()
 {
   g (0);
 }
+
+/* { dg-final { scan-assembler "@(PLT|plt)" { target i?86-*-* x86_64-*-* } } } */
+/* { dg-final { scan-assembler "@(PLT|plt)" { target { powerpc*-*-linux* && ilp32 } } } } */
+/* { dg-final { scan-assembler "bl f\n\\s*nop" { target { powerpc*-*-linux* && lp64 } } } } */

gcc/testsuite/gcc.target/powerpc/pr79439-1.c

+/* { dg-do compile { target { powerpc*-*-linux* && lp64 } } } */
+/* { dg-options "-O2 -fpic -fno-reorder-blocks" } */
+
+/* On the Linux 64-bit ABIs, we eliminate NOP in the 'rec' call even if
+   -fpic is used.  The recursive call should call the local alias.  The
+   Linux 32-bit ABIs do not require NOPs after the BL instruction.  */
+
+int f (void);
+
+void
+g (void)
+{
+}
+
+int
+rec (int a)
+{
+  int ret = 0;
+  if (a > 10 && f ())
+    ret += rec (a - 1);
+  g ();
+  return a + ret;
+}
+
+/* { dg-final { scan-assembler-times {\mbl f\M}   1 } } */
+/* { dg-final { scan-assembler-times {\mbl g\M}   1 } } */
+/* { dg-final { scan-assembler-times {\mbl rec\M} 1 } } */
+/* { dg-final { scan-assembler-times {\mnop\M}    2 } } */

gcc/testsuite/gcc.target/powerpc/pr79439.c → gcc/testsuite/gcc.target/powerpc/pr79439-2.c

-/* { dg-do compile { target { powerpc64*-*-linux* && lp64 } } } */
-/* { dg-options "-O2 -fpic" } */
+/* { dg-do compile { target { powerpc*-*-linux* && lp64 } } } */
+/* { dg-options "-O2 -fpic -fno-reorder-blocks" } */
 
 /* On the Linux 64-bit ABIs, we should not eliminate NOP in the 'rec' call if
-   -fpic is used because rec can be interposed at link time (since it is
-   external), and the recursive call should call the interposed function.  The
+   -fpic is used because rec can be interposed at link time (since it has an
+   alias), and the recursive call should call the interposed function.  The
    Linux 32-bit ABIs do not require NOPs after the BL instruction.  */
 
 int f (void);
@@ -23,6 +23,8 @@ rec (int a)
   return a + ret;
 }
 
+int rec_alias (int) __attribute__ ((alias ("rec")));
+
 /* { dg-final { scan-assembler-times {\mbl f\M}   1 } } */
 /* { dg-final { scan-assembler-times {\mbl g\M}   1 } } */
 /* { dg-final { scan-assembler-times {\mbl rec\M} 1 } } */

gcc/testsuite/gcc.target/powerpc/pr79439-3.c

+/* { dg-do compile { target { powerpc-*-linux* && ilp32 } } } */
+/* { dg-options "-O2 -fpic -fno-reorder-blocks" } */
+
+/* Analog of pr79439-1.c for 32-bit Linux.  */
+
+int f (void);
+
+void
+g (void)
+{
+}
+
+int
+rec (int a)
+{
+  int ret = 0;
+  if (a > 10 && f ())
+    ret += rec (a - 1);
+  g ();
+  return a + ret;
+}
+
+/* { dg-final { scan-assembler-times {\mbl f@plt\M}   1 } } */
+/* { dg-final { scan-assembler-times {\mbl g@plt\M}   1 } } */
+/* { dg-final { scan-assembler-times {\mbl rec@plt\M} 0 } } */