[PATCH 1/4] [RS6000] Simplify setting of fixed_regs[RS6000_PIC_OFFSET_TABLE_REGNUM]

[Alan Modra]

This makes the conditions look the same as other places that deal with
RS6000_PIC_OFFSET_TABLE_REGNUM, eg. first_reg_to_save.  No functional
changes.

        * config/rs6000/rs6000.c (rs6000_conditional_register_usage):
        Remove redundant PIC_OFFSET_TABLE_REGNUM test.  Replace with
        flag_pic test for Darwin.

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index fd4b7cc..0e570e4 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -8629,21 +8629,16 @@ rs6000_conditional_register_usage (void)
   if (DEFAULT_ABI == ABI_AIX || DEFAULT_ABI == ABI_ELFv2)
     call_really_used_regs[2] = 0;
 
-  if (DEFAULT_ABI == ABI_V4
-      && PIC_OFFSET_TABLE_REGNUM != INVALID_REGNUM
-      && flag_pic == 2)
+  if (DEFAULT_ABI == ABI_V4 && flag_pic == 2)
     fixed_regs[RS6000_PIC_OFFSET_TABLE_REGNUM] = 1;
 
-  if (DEFAULT_ABI == ABI_V4
-      && PIC_OFFSET_TABLE_REGNUM != INVALID_REGNUM
-      && flag_pic == 1)
+  if (DEFAULT_ABI == ABI_V4 && flag_pic == 1)
     fixed_regs[RS6000_PIC_OFFSET_TABLE_REGNUM]
       = call_used_regs[RS6000_PIC_OFFSET_TABLE_REGNUM]
       = call_really_used_regs[RS6000_PIC_OFFSET_TABLE_REGNUM] = 1;
 
-  if (DEFAULT_ABI == ABI_DARWIN
-      && PIC_OFFSET_TABLE_REGNUM != INVALID_REGNUM)
-      fixed_regs[RS6000_PIC_OFFSET_TABLE_REGNUM]
+  if (DEFAULT_ABI == ABI_DARWIN && flag_pic)
+    fixed_regs[RS6000_PIC_OFFSET_TABLE_REGNUM]
       = call_used_regs[RS6000_PIC_OFFSET_TABLE_REGNUM]
       = call_really_used_regs[RS6000_PIC_OFFSET_TABLE_REGNUM] = 1;
 

-- 
Alan Modra
Australia Development Lab, IBM