MPX: fix PR middle-end/79753

2017-03-20  Martin Liska  <mliska@suse.cz>

	PR middle-end/79753
	* tree-chkp.c (chkp_build_returned_bound): Do not build
	returned bounds for a LHS that's not a BOUNDED_P type.
2017-03-20  Martin Liska  <mliska@suse.cz>

	PR middle-end/79753
	* gcc.target/i386/mpx/pr79753.c: New test.

From-SVN: r246276

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 57adde8f388b890d323028ec23a29958b6446f22..5024c0f56c7c68631b276fb9e4387c9efafd46ef 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2017-03-20  Martin Liska  <mliska@suse.cz>
+
+       PR middle-end/79753
+       * tree-chkp.c (chkp_build_returned_bound): Do not build
+       returned bounds for a LHS that's not a BOUNDED_P type.
+
 2017-03-20  Martin Liska  <mliska@suse.cz>
 
        PR target/79769

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 280e5e949c368fb2ab11b43719778b948470ade9..2a767588727208d0cfb7fc39a53991c4e32ea3f5 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2017-03-20  Martin Liska  <mliska@suse.cz>
+
+       PR middle-end/79753
+       * gcc.target/i386/mpx/pr79753.c: New test.
+
 2017-03-20  Martin Liska  <mliska@suse.cz>
 
        PR target/79769

diff --git a/gcc/testsuite/gcc.target/i386/mpx/pr79753.c b/gcc/testsuite/gcc.target/i386/mpx/pr79753.c
new file mode 100644 (file)
index 0000000..9b7bc52
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/mpx/pr79753.c
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-options "-fcheck-pointer-bounds -mmpx -O2" } */
+
+int
+foo (void)
+{
+  return 0;
+}
+
+void
+bar (int **p)
+{
+  *p = (int *) (__UINTPTR_TYPE__) foo ();
+}

diff --git a/gcc/tree-chkp.c b/gcc/tree-chkp.c
index c9c8c233eb9a02d5eb2349b8928b0e4c8ccd6b2a..b1ff21851c6a0aa2602c7a658944cf200bcaa0af 100644 (file)
--- a/gcc/tree-chkp.c
+++ b/gcc/tree-chkp.c
@@ -2218,6 +2218,7 @@ chkp_build_returned_bound (gcall *call)
   gimple *stmt;
   tree fndecl = gimple_call_fndecl (call);
   unsigned int retflags;
+  tree lhs = gimple_call_lhs (call);
 
   /* To avoid fixing alloca expands in targets we handle
      it separately.  */
@@ -2227,9 +2228,8 @@ chkp_build_returned_bound (gcall *call)
          || DECL_FUNCTION_CODE (fndecl) == BUILT_IN_ALLOCA_WITH_ALIGN))
     {
       tree size = gimple_call_arg (call, 0);
-      tree lb = gimple_call_lhs (call);
       gimple_stmt_iterator iter = gsi_for_stmt (call);
-      bounds = chkp_make_bounds (lb, size, &iter, true);
+      bounds = chkp_make_bounds (lhs, size, &iter, true);
     }
   /* We know bounds returned by set_bounds builtin call.  */
   else if (fndecl
@@ -2282,9 +2282,10 @@ chkp_build_returned_bound (gcall *call)
 
       bounds = chkp_find_bounds (gimple_call_arg (call, argno), &iter);
     }
-  else if (chkp_call_returns_bounds_p (call))
+  else if (chkp_call_returns_bounds_p (call)
+          && BOUNDED_P (lhs))
     {
-      gcc_assert (TREE_CODE (gimple_call_lhs (call)) == SSA_NAME);
+      gcc_assert (TREE_CODE (lhs) == SSA_NAME);
 
       /* In general case build checker builtin call to
         obtain returned bounds.  */
@@ -2311,7 +2312,7 @@ chkp_build_returned_bound (gcall *call)
       print_gimple_stmt (dump_file, call, 0, TDF_VOPS|TDF_MEMSYMS);
     }
 
-  bounds = chkp_maybe_copy_and_register_bounds (gimple_call_lhs (call), bounds);
+  bounds = chkp_maybe_copy_and_register_bounds (lhs, bounds);
 
   return bounds;
 }