[PATCH] Fix ICE with -fopt-info-inline (PR ipa/87955)

[David Malcolm]

PR ipa/87955 reports a problem I introduced in r265920, where I converted
the guard in report_inline_failed_reason from using:
  if (dump_file)
to using
  if (dump_enabled_p ()).
without updating the calls to cl_target_option_print_diff and
cl_optimization_print_diff, which assume that dump_file is non-NULL.

The functions are auto-generated.  Rather than porting them to the dump
API, this patch applies the workaround of adding the missing checks on
dump_file before calling them.

Successfully bootstrapped & regrtested on x86_64-pc-linux-gnu.

OK for trunk?

gcc/ChangeLog:
        PR ipa/87955
        * ipa-inline.c (report_inline_failed_reason): Guard calls to
        cl_target_option_print_diff and cl_optimization_print_diff with
        if (dump_file).

gcc/testsuite/ChangeLog:
        PR ipa/87955
        * gcc.target/i386/pr87955.c: New test.
---
 gcc/ipa-inline.c                        | 14 ++++++++------
 gcc/testsuite/gcc.target/i386/pr87955.c | 10 ++++++++++
 2 files changed, 18 insertions(+), 6 deletions(-)
 create mode 100644 gcc/testsuite/gcc.target/i386/pr87955.c

diff --git a/gcc/ipa-inline.c b/gcc/ipa-inline.c
index e04ede7..173808a 100644
--- a/gcc/ipa-inline.c
+++ b/gcc/ipa-inline.c
@@ -244,13 +244,15 @@ report_inline_failed_reason (struct cgraph_edge *e)
                           e->callee->ultimate_alias_target 
()->lto_file_data->file_name);
        }
       if (e->inline_failed == CIF_TARGET_OPTION_MISMATCH)
-       cl_target_option_print_diff
-        (dump_file, 2, target_opts_for_fn (e->caller->decl),
-          target_opts_for_fn (e->callee->ultimate_alias_target ()->decl));
+       if (dump_file)
+         cl_target_option_print_diff
+           (dump_file, 2, target_opts_for_fn (e->caller->decl),
+            target_opts_for_fn (e->callee->ultimate_alias_target ()->decl));
       if (e->inline_failed == CIF_OPTIMIZATION_MISMATCH)
-       cl_optimization_print_diff
-         (dump_file, 2, opts_for_fn (e->caller->decl),
-          opts_for_fn (e->callee->ultimate_alias_target ()->decl));
+       if (dump_file)
+         cl_optimization_print_diff
+           (dump_file, 2, opts_for_fn (e->caller->decl),
+            opts_for_fn (e->callee->ultimate_alias_target ()->decl));
     }
 }
 
diff --git a/gcc/testsuite/gcc.target/i386/pr87955.c 
b/gcc/testsuite/gcc.target/i386/pr87955.c
new file mode 100644
index 0000000..ed87da6
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr87955.c
@@ -0,0 +1,10 @@
+/* { dg-options "-O2 -fopt-info-inline-missed" } */
+
+float a;
+
+__attribute__((__target__("fpmath=387")))
+int b() {
+  return a;
+}
+
+int c() { return b(); } /* { dg-missed "not inlinable: c/\[0-9\]* -> 
b/\[0-9\]*, target specific option mismatch" } */
-- 
1.8.5.3