cbuild successfully built this on i686-precise-cbuild445-oort4-i686r1.

The build results are available at:
 http://cbuild.validation.linaro.org/build/gcc-linaro-4.7+bzr115045~christophe-lyon~backport_bswap16/logs/i686-precise-cbuild445-oort4-i686r1

+PASS: gcc.c-torture/compile/20121107-1.c  -O0  (test for excess errors)
+PASS: gcc.c-torture/compile/20121107-1.c  -O1  (test for excess errors)
+PASS: gcc.c-torture/compile/20121107-1.c  -O2 -flto -fno-use-linker-plugin -flto-partition=none  (test for excess errors)
+PASS: gcc.c-torture/compile/20121107-1.c  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  (test for excess errors)
+PASS: gcc.c-torture/compile/20121107-1.c  -O2  (test for excess errors)
+PASS: gcc.c-torture/compile/20121107-1.c  -O3 -fomit-frame-pointer  (test for excess errors)
+PASS: gcc.c-torture/compile/20121107-1.c  -O3 -g  (test for excess errors)
+PASS: gcc.c-torture/compile/20121107-1.c  -Os  (test for excess errors)
+PASS: gcc.dg/pr55570.c  (test for errors, line 4)
+PASS: gcc.dg/pr55570.c (test for excess errors)
+PASS: gcc.dg/torture/pr53663-1.c  -O0  execution test
+PASS: gcc.dg/torture/pr53663-1.c  -O0  (test for excess errors)
+PASS: gcc.dg/torture/pr53663-1.c  -O1  execution test
+PASS: gcc.dg/torture/pr53663-1.c  -O1  (test for excess errors)
+PASS: gcc.dg/torture/pr53663-1.c  -O2  execution test
+PASS: gcc.dg/torture/pr53663-1.c  -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution test
+PASS: gcc.dg/torture/pr53663-1.c  -O2 -flto -fno-use-linker-plugin -flto-partition=none  (test for excess errors)
+PASS: gcc.dg/torture/pr53663-1.c  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test
+PASS: gcc.dg/torture/pr53663-1.c  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  (test for excess errors)
+PASS: gcc.dg/torture/pr53663-1.c  -O2  (test for excess errors)
+PASS: gcc.dg/torture/pr53663-1.c  -O3 -fomit-frame-pointer  execution test
+PASS: gcc.dg/torture/pr53663-1.c  -O3 -fomit-frame-pointer  (test for excess errors)
+PASS: gcc.dg/torture/pr53663-1.c  -O3 -g  execution test
+PASS: gcc.dg/torture/pr53663-1.c  -O3 -g  (test for excess errors)
+PASS: gcc.dg/torture/pr53663-1.c  -Os  execution test
+PASS: gcc.dg/torture/pr53663-1.c  -Os  (test for excess errors)
+PASS: gcc.dg/torture/pr53663-2.c  -O0  execution test
+PASS: gcc.dg/torture/pr53663-2.c  -O0  (test for excess errors)
+PASS: gcc.dg/torture/pr53663-2.c  -O1  execution test
+PASS: gcc.dg/torture/pr53663-2.c  -O1  (test for excess errors)
+PASS: gcc.dg/torture/pr53663-2.c  -O2  execution test
+PASS: gcc.dg/torture/pr53663-2.c  -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution test
+PASS: gcc.dg/torture/pr53663-2.c  -O2 -flto -fno-use-linker-plugin -flto-partition=none  (test for excess errors)
+PASS: gcc.dg/torture/pr53663-2.c  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test
+PASS: gcc.dg/torture/pr53663-2.c  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  (test for excess errors)
+PASS: gcc.dg/torture/pr53663-2.c  -O2  (test for excess errors)
+PASS: gcc.dg/torture/pr53663-2.c  -O3 -fomit-frame-pointer  execution test
+PASS: gcc.dg/torture/pr53663-2.c  -O3 -fomit-frame-pointer  (test for excess errors)
+PASS: gcc.dg/torture/pr53663-2.c  -O3 -g  execution test
+PASS: gcc.dg/torture/pr53663-2.c  -O3 -g  (test for excess errors)
+PASS: gcc.dg/torture/pr53663-2.c  -Os  execution test
+PASS: gcc.dg/torture/pr53663-2.c  -Os  (test for excess errors)
+PASS: gcc.dg/torture/pr53663-3.c  -O0  execution test
+PASS: gcc.dg/torture/pr53663-3.c  -O0  (test for excess errors)
+PASS: gcc.dg/torture/pr53663-3.c  -O1  execution test
+PASS: gcc.dg/torture/pr53663-3.c  -O1  (test for excess errors)
+PASS: gcc.dg/torture/pr53663-3.c  -O2  execution test
+PASS: gcc.dg/torture/pr53663-3.c  -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution test
+PASS: gcc.dg/torture/pr53663-3.c  -O2 -flto -fno-use-linker-plugin -flto-partition=none  (test for excess errors)
+PASS: gcc.dg/torture/pr53663-3.c  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test
...and 78 more

The full diff is at:
 http://cbuild.validation.linaro.org/build/gcc-linaro-4.7+bzr115045~christophe-lyon~backport_bswap16/logs/i686-precise-cbuild445-oort4-i686r1/testsuite-diff.txt

The full testsuite results are at:
 http://cbuild.validation.linaro.org/build/gcc-linaro-4.7+bzr115045~christophe-lyon~backport_bswap16/logs/i686-precise-cbuild445-oort4-i686r1/gcc-testsuite.txt

cbuild-checked: i686-precise-cbuild445-oort4-i686r1