defaults.h (HONOR_REG_ALLOC_ORDER): Change HONOR_REG_ALLOC_ORDER to a C expression...

[platform/upstream/gcc.git] / gcc / doc / tm.texi.in

diff --git a/gcc/doc/tm.texi.in b/gcc/doc/tm.texi.in
index d793d26..a5c3741 100644 (file)
--- a/gcc/doc/tm.texi.in
+++ b/gcc/doc/tm.texi.in
@@ -1849,8 +1849,8 @@ Normally, IRA tries to estimate the costs for saving a register in the
 prologue and restoring it in the epilogue.  This discourages it from
 using call-saved registers.  If a machine wants to ensure that IRA
 allocates registers in the order given by REG_ALLOC_ORDER even if some
-call-saved registers appear earlier than call-used ones, this macro
-should be defined.
+call-saved registers appear earlier than call-used ones, then define this
+macro as a C expression to nonzero. Default is 0.
 @end defmac
 
 @defmac IRA_HARD_REGNO_ADD_COST_MULTIPLIER (@var{regno})