Code review comment for lp://staging/~christophe-lyon/gcc-linaro/backport_bswap16_perf_regression

cbuild successfully built this on x86_64-precise-cbuild449-oort1-xcortexa15hfr1.

The build results are available at:
 http://cbuild.validation.linaro.org/build/gcc-linaro-4.7+bzr115042~christophe-lyon~backport_bswap16_perf_regression/logs/x86_64-precise-cbuild449-oort1-xcortexa15hfr1

-FAIL: gcc.dg/di-sync-multithread.c execution test
+PASS: gcc.dg/di-sync-multithread.c execution test
-UNSUPPORTED: gcc.dg/lower-subreg-1.c
+PASS: gcc.dg/lower-subreg-1.c scan-rtl-dump subreg1 "Splitting reg"
+PASS: gcc.dg/lower-subreg-1.c (test for excess errors)
+PASS: gcc.target/arm/builtin-bswap16-1.c scan-assembler-not orr[ \t]
+PASS: gcc.target/arm/builtin-bswap16-1.c (test for excess errors)
+PASS: gcc.target/arm/builtin-bswap-1.c scan-assembler-not orr[ \t]
+FAIL: gcc.target/arm/builtin-bswap-1.c scan-assembler-times rev16\\t 2
+FAIL: gcc.target/arm/builtin-bswap-1.c scan-assembler-times revsh\\t 2
+PASS: gcc.target/arm/builtin-bswap-1.c scan-assembler-times rev\\t 4
+PASS: gcc.target/arm/builtin-bswap-1.c (test for excess errors)
-PASS: gcc.target/arm/neon-extend-1.c scan-assembler vdup.32
-PASS: gcc.target/arm/neon-extend-1.c scan-assembler vshr.u64
-PASS: gcc.target/arm/neon-extend-1.c (test for excess errors)
-PASS: gcc.target/arm/neon-extend-2.c scan-assembler vdup.32
-PASS: gcc.target/arm/neon-extend-2.c scan-assembler vshr.s64
-PASS: gcc.target/arm/neon-extend-2.c (test for excess errors)
-PASS: 21_strings/basic_string/pthread4.cc execution test
+FAIL: 21_strings/basic_string/pthread4.cc execution test
-FAIL: 30_threads/call_once/39909.cc execution test
+PASS: 30_threads/call_once/39909.cc execution test

The full diff is at:
 http://cbuild.validation.linaro.org/build/gcc-linaro-4.7+bzr115042~christophe-lyon~backport_bswap16_perf_regression/logs/x86_64-precise-cbuild449-oort1-xcortexa15hfr1/testsuite-diff.txt

The full testsuite results are at:
 http://cbuild.validation.linaro.org/build/gcc-linaro-4.7+bzr115042~christophe-lyon~backport_bswap16_perf_regression/logs/x86_64-precise-cbuild449-oort1-xcortexa15hfr1/gcc-testsuite.txt

cbuild-checked: x86_64-precise-cbuild449-oort1-xcortexa15hfr1