Revert: "i386: Remove REG_ALLOC_ORDER definition"

This reverts commit 4c61e35f20fe2ffeb9421dbd6f26c767a234a4a0.

diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h
index a34442e6b7e46a6420e51c5c2ee63cd2afa41db1..69fddcafd314dd9d077d3c6b9c334646704ec794 100644 (file)
--- a/gcc/config/i386/i386.h
+++ b/gcc/config/i386/i386.h
@@ -1163,6 +1163,22 @@ extern const char *host_detect_local_cpu (int argc, const char **argv);
  /* k0,  k1,  k2,  k3,  k4,  k5,  k6,  k7*/                    \
      1,   1,   1,   1,   1,   1,   1,   1 }
 
+/* Order in which to allocate registers.  Each register must be
+   listed once, even those in FIXED_REGISTERS.  List frame pointer
+   late and fixed registers last.  Note that, in general, we prefer
+   registers listed in CALL_USED_REGISTERS, keeping the others
+   available for storage of persistent values.
+
+   The ADJUST_REG_ALLOC_ORDER actually overwrite the order,
+   so this is just empty initializer for array.  */
+
+#define REG_ALLOC_ORDER                                                        \
+{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,                        \
+  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,      \
+  32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,      \
+  48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,      \
+  64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75 }
+
 /* ADJUST_REG_ALLOC_ORDER is a macro which permits reg_alloc_order
    to be rearranged based on a particular function.  When using sse math,
    we want to allocate SSE before x87 registers and vice versa.  */