arm: Fix ICE on glibc compilation after my DIVMOD optimization [PR97322]

The arm target hook for divmod wasn't prepared to handle constants passed to
the function.

2020-10-08  Jakub Jelinek  <jakub@redhat.com>

	PR target/97322
	* config/arm/arm.c (arm_expand_divmod_libfunc): Pass mode instead of
	GET_MODE (op0) or GET_MODE (op1) to emit_library_call_value.

	* gcc.dg/pr97322.c: New test.

diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 5fdc143..5d9c995 100644 (file)
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -33275,9 +33275,7 @@ arm_expand_divmod_libfunc (rtx libfunc, machine_mode mode,
     = smallest_int_mode_for_size (2 * GET_MODE_BITSIZE (mode));
 
   rtx libval = emit_library_call_value (libfunc, NULL_RTX, LCT_CONST,
-                                       libval_mode,
-                                       op0, GET_MODE (op0),
-                                       op1, GET_MODE (op1));
+                                       libval_mode, op0, mode, op1, mode);
 
   rtx quotient = simplify_gen_subreg (mode, libval, libval_mode, 0);
   rtx remainder = simplify_gen_subreg (mode, libval, libval_mode,

diff --git a/gcc/testsuite/gcc.dg/pr97322.c b/gcc/testsuite/gcc.dg/pr97322.c
new file mode 100644 (file)
index 0000000..f253c0d
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr97322.c
@@ -0,0 +1,17 @@
+/* PR target/97322 */
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+void
+foo (unsigned long long x, unsigned long long *y)
+{
+  y[0] = x / 10;
+  y[1] = x % 10;
+}
+
+void
+bar (unsigned int x, unsigned int *y)
+{
+  y[0] = x / 10;
+  y[1] = x % 10;
+}