re PR bootstrap/59496 (Bootstrap fails on powerpc-apple-darwin9 after r205685)

gcc:

	PR bootstrap/59496
	* config/rs6000/darwin.h (ADJUST_FIELD_ALIGN): Fix unused variable
	warning.  Amend comment to reflect current functionality.

Co-Authored-By: Iain Sandoe <iain@codesourcery.com>
From-SVN: r206802

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index deac3c39d4ee4245bd2e55ad17225374dfd0ea4b..df6ab6918f31e157367b356cafa4689fe94e85c2 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2014-01-20  Jan-Benedict Glaw  <jbglaw@lug-owl.de>
+           Iain Sandoe  <iain@codesourcery.com>
+
+       PR bootstrap/59496
+       * config/rs6000/darwin.h (ADJUST_FIELD_ALIGN): Fix unused variable
+       warning.  Amend comment to reflect current functionality.
+
 2014-01-20  Richard Biener  <rguenther@suse.de>
 
        PR middle-end/59860

diff --git a/gcc/config/rs6000/darwin.h b/gcc/config/rs6000/darwin.h
index 43a2ab514dc74a2ee80ed18da8f5a482a2ac12c2..0329f3f621b40d021d39d80a45032eb8c93f6f3b 100644 (file)
--- a/gcc/config/rs6000/darwin.h
+++ b/gcc/config/rs6000/darwin.h
@@ -321,16 +321,19 @@ extern int darwin_emit_branch_islands;
    ? GENERAL_REGS                                              \
    : (CLASS))
 
-/* Compute field alignment.  This is similar to the version of the
-   macro in the Apple version of GCC, except that version supports
-   'mac68k' alignment, and that version uses the computed alignment
-   always for the first field of a structure.  The first-field
-   behavior is dealt with by
-   darwin_rs6000_special_round_type_align.  */
-#define ADJUST_FIELD_ALIGN(FIELD, COMPUTED)    \
-  (TARGET_ALIGN_NATURAL ? (COMPUTED)           \
-   : (COMPUTED) == 128 ? 128                   \
-   : MIN ((COMPUTED), 32))
+/* Compute field alignment.
+   This implements the 'power' alignment rule by pegging the alignment of
+   items (beyond the first aggregate field) to 32 bits.  The pegging is
+   suppressed for vector and long double items (both 128 in size).
+   There is a dummy use of the FIELD argument to avoid an unused variable
+   warning (see PR59496).  */
+#define ADJUST_FIELD_ALIGN(FIELD, COMPUTED)                    \
+  ((void) (FIELD),                                             \
+    (TARGET_ALIGN_NATURAL                                      \
+     ? (COMPUTED)                                              \
+     : (COMPUTED) == 128                                       \
+       ? 128                                                   \
+       : MIN ((COMPUTED), 32)))
 
 /* Darwin increases natural record alignment to doubleword if the first
    field is an FP double while the FP fields remain word aligned.  */