diff --git a/gcc/regrename.cc b/gcc/regrename.cc
index 10271e1b17d..f65135151d8 100644
--- a/gcc/regrename.cc
+++ b/gcc/regrename.cc
@@ -324,8 +324,7 @@ static bool
 check_new_reg_p (int reg ATTRIBUTE_UNUSED, int new_reg,
 		 class du_head *this_head, HARD_REG_SET this_unavailable)
 {
-  machine_mode mode = GET_MODE (*this_head->first->loc);
-  int nregs = hard_regno_nregs (new_reg, mode);
+  int nregs = this_head->nregs;
   int i;
   struct du_chain *tmp;
 
diff --git a/gcc/testsuite/gcc.target/powerpc/pr105041.c b/gcc/testsuite/gcc.target/powerpc/pr105041.c
new file mode 100644
index 00000000000..e5144b293a3
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/pr105041.c
@@ -0,0 +1,22 @@
+/* { dg-options "-mdejagnu-cpu=power4 -O2 -fcompare-debug -fharden-compares -frename-registers" } */
+
+double m;
+int n;
+
+unsigned int
+foo (unsigned int x, int y)
+{
+  long long int a = y, b = !a;
+  int c = 0;
+
+  if (b != x)
+    while ((int) m == a)
+      {
+        c = a;
+        a = 0;
+      }
+
+  n = b = y;
+
+  return x + c;
+}