diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7e482f488517..a0f9fada96b6 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2008-09-07  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
+
+	* pa32-regs.h (IRA_COVER_CLASSES): Define.
+	* pa64-regs.h (IRA_COVER_CLASSES): Define.
+
 2008-09-07  Helge Deller  <deller@gmx.de>
 
         * pa/linux-atomic.c: New file.
diff --git a/gcc/config/pa/pa32-regs.h b/gcc/config/pa/pa32-regs.h
index 89cbb9b75521..4463c631d38a 100644
--- a/gcc/config/pa/pa32-regs.h
+++ b/gcc/config/pa/pa32-regs.h
@@ -287,6 +287,19 @@ enum reg_class { NO_REGS, R1_REGS, GENERAL_REGS, FPUPPER_REGS, FP_REGS,
   {0x00000000, 0x00000000, 0x01000000},	/* SHIFT_REGS */		\
   {0xfffffffe, 0xffffffff, 0x01ffffff}}	/* ALL_REGS */
 
+/* The following macro defines cover classes for Integrated Register
+   Allocator.  Cover classes is a set of non-intersected register
+   classes covering all hard registers used for register allocation
+   purpose.  Any move between two registers of a cover class should be
+   cheaper than load or store of the registers.  The macro value is
+   array of register classes with LIM_REG_CLASSES used as the end
+   marker.  */
+
+#define IRA_COVER_CLASSES						\
+{									\
+  GENERAL_REGS, FP_REGS, SHIFT_REGS, LIM_REG_CLASSES			\
+}
+
 /* Defines invalid mode changes.  */
 
 #define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \
diff --git a/gcc/config/pa/pa64-regs.h b/gcc/config/pa/pa64-regs.h
index 828265f23b83..ec865606d5f8 100644
--- a/gcc/config/pa/pa64-regs.h
+++ b/gcc/config/pa/pa64-regs.h
@@ -235,12 +235,25 @@ enum reg_class { NO_REGS, R1_REGS, GENERAL_REGS, FPUPPER_REGS, FP_REGS,
  {{0x00000000, 0x00000000},	/* NO_REGS */			\
   {0x00000002, 0x00000000},	/* R1_REGS */			\
   {0xfffffffe, 0x00000000},	/* GENERAL_REGS */		\
-  {0x00000000, 0x00000000},	/* FPUPPER_REGS */			\
+  {0x00000000, 0x00000000},	/* FPUPPER_REGS */		\
   {0x00000000, 0x0fffffff},	/* FP_REGS */			\
   {0xfffffffe, 0x0fffffff},	/* GENERAL_OR_FP_REGS */	\
   {0x00000000, 0x10000000},	/* SHIFT_REGS */		\
   {0xfffffffe, 0x1fffffff}}	/* ALL_REGS */
 
+/* The following macro defines cover classes for Integrated Register
+   Allocator.  Cover classes is a set of non-intersected register
+   classes covering all hard registers used for register allocation
+   purpose.  Any move between two registers of a cover class should be
+   cheaper than load or store of the registers.  The macro value is
+   array of register classes with LIM_REG_CLASSES used as the end
+   marker.  */
+
+#define IRA_COVER_CLASSES						\
+{									\
+  GENERAL_REGS, FP_REGS, SHIFT_REGS, LIM_REG_CLASSES			\
+}
+
 /* Defines invalid mode changes.  */
 
 #define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \