re PR target/45070 (Miscompiled c++ class with packed attribute on ARM with -Os…

re PR target/45070 (Miscompiled c++ class with packed attribute on ARM with -Os optimizations (Qt 4.6.2))


	PR target/45070
	* config/arm/arm.c (thumb1_extra_regs_pushed): Handle return value of size
	less than 4 bytes by using macro ARM_NUM_INTS.
	(thumb1_unexpanded_epilogue): Use macro ARM_NUM_INTS.

From-SVN: r190919

gcc/config/arm/arm.c

@@ -21862,7 +21862,7 @@ thumb1_extra_regs_pushed (arm_stack_offsets *offsets, bool for_prologue)
   unsigned long l_mask = live_regs_mask & (for_prologue ? 0x40ff : 0xff);
   /* Then count how many other high registers will need to be pushed.  */
   unsigned long high_regs_pushed = bit_count (live_regs_mask & 0x0f00);
-  int n_free, reg_base;
+  int n_free, reg_base, size;
 
   if (!for_prologue && frame_pointer_needed)
     amount = offsets->locals_base - offsets->saved_regs;
@@ -21901,7 +21901,8 @@ thumb1_extra_regs_pushed (arm_stack_offsets *offsets, bool for_prologue)
   n_free = 0;
   if (!for_prologue)
     {
-      reg_base = arm_size_return_regs () / UNITS_PER_WORD;
+      size = arm_size_return_regs ();
+      reg_base = ARM_NUM_INTS (size);
       live_regs_mask >>= reg_base;
     }
 
@@ -21955,8 +21956,7 @@ thumb1_unexpanded_epilogue (void)
   if (extra_pop > 0)
     {
       unsigned long extra_mask = (1 << extra_pop) - 1;
-      live_regs_mask |= extra_mask << ((size + UNITS_PER_WORD - 1) 
-				       / UNITS_PER_WORD);
+      live_regs_mask |= extra_mask << ARM_NUM_INTS (size);
     }
 
   /* The prolog may have pushed some high registers to use as