PR optimization/6177

	* expr.c (expand_expr) [COMPONENT_REF]: Handle op0 CONCAT if
	bitpos is 0 and bitsize CONCAT size.

	* gcc.c-torture/execute/20020411-1.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@52178 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 34c0f0f..58f921d 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,11 @@
 2002-04-11  Jakub Jelinek  <jakub@redhat.com>
 
+       PR optimization/6177
+       * expr.c (expand_expr) [COMPONENT_REF]: Handle op0 CONCAT if
+       bitpos is 0 and bitsize CONCAT size.
+
+2002-04-11  Jakub Jelinek  <jakub@redhat.com>
+
        PR c/6223
        * combine.c (if_then_else_cond): Use trunc_int_for_mode on nz.
 

diff --git a/gcc/expr.c b/gcc/expr.c
index 3e0add2..a9ca3f6 100644 (file)
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -6954,6 +6954,16 @@ expand_expr (exp, target, tmode, modifier)
            MEM_VOLATILE_P (op0) = 1;
          }
 
+       /* The following code doesn't handle CONCAT.
+          Assume only bitpos == 0 can be used for CONCAT, due to
+          one element arrays having the same mode as its element.  */
+       if (GET_CODE (op0) == CONCAT)
+         {
+           if (bitpos != 0 || bitsize != GET_MODE_BITSIZE (GET_MODE (op0)))
+             abort ();
+           return op0;
+         }
+
        /* In cases where an aligned union has an unaligned object
           as a field, we might be extracting a BLKmode value from
           an integer-mode (e.g., SImode) object.  Handle this case

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index df40cb4..ccabe18 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,10 +1,9 @@
 2002-04-11  Jakub Jelinek  <jakub@redhat.com>
 
-       PR c/6223
-       * combine.c (if_then_else_cond): Use trunc_int_for_mode on nz.
-
        * gcc.dg/20020411-1.c: New test.
 
+       * gcc.c-torture/execute/20020411-1.c: New test.
+
 2002-04-10  Janis Johnson  <janis187@us.ibm.com>
 
        * g77.f-torture/execute/6177.f: New test.

diff --git a/gcc/testsuite/gcc.c-torture/execute/20020411-1.c b/gcc/testsuite/gcc.c-torture/execute/20020411-1.c
new file mode 100644 (file)
index 0000000..89e2bae
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/20020411-1.c
@@ -0,0 +1,25 @@
+/* PR optimization/6177
+   This testcase ICEd because expr.c did not expect to see a CONCAT
+   as array rtl.  */
+
+extern void abort (void);
+extern void exit (int);
+
+__complex__ float foo (void)
+{
+  __complex__ float f[1];
+  __real__ f[0] = 1.0;
+  __imag__ f[0] = 1.0;
+  f[0] = __builtin_conjf (f[0]);
+  return f[0];
+}
+
+int main (void)
+{
+  __complex__ double d[1];
+  d[0] = foo ();
+  if (__real__ d[0] != 1.0
+      || __imag__ d[0] != -1.0)
+    abort ();
+  exit (0);
+}