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From: "dje at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/53300] [4.8 Regression] AIX bootstrap related to varpool patch
Date: Fri, 11 May 2012 15:46:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53300

--- Comment #16 from David Edelsohn <dje at gcc dot gnu.org> 2012-05-11 15:11:59 UTC ---
The mis-compiled file is libcpp/line-map.c.  I have attached the pre-processed
output for line-map.c on AIX. I also have attached assembly files showing the
correct and incorrect output.  The difference is:

--- line-map.s.good     2012-05-11 11:01:33.000000000 -0400
+++ line-map.s.bad      2012-05-11 11:00:43.000000000 -0400
@@ -4536,26 +4536,6 @@
        .byte 10
        .byte "Macro line maps"
        .byte 10, 0
-       .space 2
-LC..0:
-       .byte "LC_ENTER"
-       .byte 0
-       .space 3
-LC..1:
-       .byte "LC_LEAVE"
-       .byte 0
-       .space 3
-LC..2:
-       .byte "LC_RENAME"
-       .byte 0
-       .space 2
-LC..3:
-       .byte "LC_RENAME_VERBATIM"
-       .byte 0
-       .space 1
-LC..4:
-       .byte "LC_ENTER_MACRO"
-       .byte 0
        .csect _linemap.rw_[RW],4
        .align 2
        .set LANCHOR..1,$ + 0

which corresponds to

enum lc_reason
{
  LC_ENTER = 0,
  LC_LEAVE,
  LC_RENAME,
  LC_RENAME_VERBATIM,
  LC_ENTER_MACRO

};