rtl.h (struct rtx_def): Add comment for field jump.

[gcc.git] / gcc / rtl.h

diff --git a/gcc/rtl.h b/gcc/rtl.h
index eea80ef399c71af62649506d45e938c99706e9f9..e9013ec4a084ce977667e7301067cc92df0305c1 100644 (file)
--- a/gcc/rtl.h
+++ b/gcc/rtl.h
@@ -265,7 +265,8 @@ struct GTY((chain_next ("RTX_NEXT (&%h)"),
      1 in a SET that is for a return.
      In a CODE_LABEL, part of the two-bit alternate entry field.
      1 in a CONCAT is VAL_EXPR_IS_COPIED in var-tracking.c.
-     1 in a VALUE is SP_BASED_VALUE_P in cselib.c.  */
+     1 in a VALUE is SP_BASED_VALUE_P in cselib.c.
+     1 in a SUBREG generated by LRA for reload insns.  */
   unsigned int jump : 1;
   /* In a CODE_LABEL, part of the two-bit alternate entry field.
      1 in a MEM if it cannot trap.
@@ -1411,6 +1412,11 @@ do {                                                                     \
   ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
    ? -1 : (int) (RTX)->unchanging)
 
+/* True if the subreg was generated by LRA for reload insns.  Such
+   subregs are valid only during LRA.  */
+#define LRA_SUBREG_P(RTX)      \
+  (RTL_FLAG_CHECK1("LRA_SUBREG_P", (RTX), SUBREG)->jump)
+
 /* Access various components of an ASM_OPERANDS rtx.  */
 
 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)