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[PATCH] rs6000: Fix logic for when to emit .machine (PR71216)

The current logic determining whether to use .machine in the generated
asm code puts it there if the compiler is not configured with a default
target cpu, _or_ no -mcpu= was given on the command line.  It should
be "and" instead.

Tested on powerpc64-linux (-m32 as well).  Also tested manually with
the testcase in the PR (not included in the patch, it depends on your GCC

Is this okay for trunk?  And backports later?


2016-07-22  Segher Boessenkool  <>

	* config/rs6000/rs6000.c (rs6000_file_start): Fix condition for
	when to emit a ".machine" pseudo-op.

 gcc/config/rs6000/rs6000.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 6fe94d5..7d47f45 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -5794,8 +5794,8 @@ rs6000_file_start (void)
-  if (rs6000_default_cpu == 0 || rs6000_default_cpu[0] == '\0'
-      || !global_options_set.x_rs6000_cpu_index)
+  if (!(rs6000_default_cpu && rs6000_default_cpu[0])
+      && !global_options_set.x_rs6000_cpu_index)
       fputs ("\t.machine ", asm_out_file);
       if ((rs6000_isa_flags & OPTION_MASK_MODULO) != 0)

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