re PR target/43643 (gcc -m64 -pg corrupts %rdx / %rcx register)

	gcc:
	PR target/43643
	* config/i386/gmon-sol2.c [__x86_64__]: Properly restore %rcx.

	gcc/testsuite:
	PR target/43643
	* gcc.dg/pr43643.c: New test.

From-SVN: r158130

gcc/ChangeLog

 2010-04-08  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
+	PR target/43643
+	* config/i386/gmon-sol2.c [__x86_64__]: Properly restore %rcx.
+
+2010-04-08  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
 	* doc/install.texi (Specific, i?86-*-solaris2.10): Fix grammar.
 	(Specific, *-*-solaris2*): Likewise.
 	Don't prefer Sun as over GNU as.

gcc/config/i386/gmon-sol2.c

@@ -275,7 +275,7 @@ asm(".globl _mcount\n"
     "\tmovq\t0x20(%rsp),%rdi\n"
     "\tmovq\t0x18(%rsp),%rsi\n"
     "\tmovq\t0x10(%rsp),%rdx\n"
-    "\tmovq\t0x08(%rsp),%rdx\n"
+    "\tmovq\t0x08(%rsp),%rcx\n"
     "\tmovq\t(%rsp),%rax\n"
     "\taddq\t$0x38,%rsp\n"
     "\tretq\n"

gcc/testsuite/ChangeLog

+2010-04-08  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	PR target/43643
+	* gcc.dg/pr43643.c: New test.
+
 2010-04-08  Tobias Burnus  <burnus@net-b.de>
 
 	* gfortran.dg/iso_fortran_env_6.f90: Add more checks.

gcc/testsuite/gcc.dg/pr43643.c

+/* Contributed by Jürgen Keil <jrgn.keil@googlemail.com> */
+
+/* { dg-do run } */
+/* { dg-require-profiling "-pg" } */
+/* { dg-options "-O2 -pg" } */
+
+extern char *strdup (const char *);
+
+void
+func(char *a, char *b, char *c)
+{
+  strdup(a);
+  strdup(b);
+  strdup(c);
+}
+
+int
+main(void)
+{
+  func("a", "b", "c");
+  return 0;
+}
+
+/* { dg-final { cleanup-profile-file } } */