Handle internal functions in is_tm_pure_call

The upcoming changes to use internal functions for things like sqrt
caused a failure in gcc.dg/tm/20100610.c, because we were trying to get
call flags from the null gimple_call_fn of an IFN_SQRT call.  We've been
making fairly heavy use of internal functions for a while now so I think
this might be latent.

Tested on x86_64-linux-gnu, aarch64-linux-gnu and arm-linux-gnueabi.

gcc/
	* trans-mem.c (is_tm_pure_call): Use gimple_call_flags for
	internal functions.

From-SVN: r229925

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 6ffc9aa..5d9d2f8 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,10 @@
 2015-11-07  Richard Sandiford  <richard.sandiford@arm.com>
 
+       * trans-mem.c (is_tm_pure_call): Use gimple_call_flags for
+       internal functions.
+
+2015-11-07  Richard Sandiford  <richard.sandiford@arm.com>
+
        * builtins.def: #undef DEF_BUILTIN and DEF_BUILTIN_CHKP
        * builtins.c, genmatch.c, tree-core.h: Don't undef them here.
 

diff --git a/gcc/trans-mem.c b/gcc/trans-mem.c
index 45bc759..4583bd5 100644 (file)
--- a/gcc/trans-mem.c
+++ b/gcc/trans-mem.c
@@ -266,6 +266,9 @@ is_tm_safe (const_tree x)
 static bool
 is_tm_pure_call (gimple *call)
 {
+  if (gimple_call_internal_p (call))
+    return (gimple_call_flags (call) & (ECF_CONST | ECF_TM_PURE)) != 0;
+
   tree fn = gimple_call_fn (call);
 
   if (TREE_CODE (fn) == ADDR_EXPR)