obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 45 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.c-torture/compile/pr39845.c b/gcc/testsuite/gcc.c-torture/compile/pr39845.c
new file mode 100644
index 000000000..bd731989d
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/pr39845.c
@@ -0,0 +1,45 @@
+
+/* { dg-options "-fno-short-enums" {target short_enums} } */
+typedef union tree_node *tree;
+enum tree_code { EXCESS_PRECISION_EXPR };
+enum built_in_function { BUILT_IN_ACOS, BUILT_IN_FPCLASSIFY, BUILT_IN_ISFINITE };
+struct tree_base {
+    __extension__ enum tree_code code : 16;
+    unsigned side_effects_flag : 1;
+};
+struct tree_exp {
+    tree     operands[1];
+};
+struct tree_function_decl {
+    __extension__ enum built_in_function function_code : 11;
+    unsigned static_ctor_flag : 1;
+};
+union tree_node {
+    struct tree_base base;
+    struct tree_function_decl function_decl;
+    struct tree_exp exp;
+};
+static tree
+convert_arguments (tree fundecl)
+{
+  tree val = (void *)0;
+  unsigned int parmnum;
+  unsigned char type_generic_remove_excess_precision = 0;
+  switch (((fundecl)->function_decl.function_code))
+    {
+      case BUILT_IN_ISFINITE:
+      case BUILT_IN_FPCLASSIFY:
+	  type_generic_remove_excess_precision = 1;
+    }
+  for (parmnum = 0;; ++parmnum)
+    if (((enum tree_code) (val)->base.code) == EXCESS_PRECISION_EXPR
+	&& !type_generic_remove_excess_precision)
+      val = ((val)->exp.operands[0]);
+  return val;
+}
+tree
+build_function_call_vec (tree function)
+{
+  return convert_arguments (function);
+}
+