cbuild successfully built this on x86_64-natty-cbuild238-oort1-x86_64r1.

The build results are available at:
 http://ex.seabright.co.nz/build/gcc-linaro-4.5+bzr99560~ams-codesourcery~merge-from-fsf-4.5-20120201/logs/x86_64-natty-cbuild238-oort1-x86_64r1

+PASS: g++.dg/ipa/pr51759.C (test for excess errors)
+PASS: g++.dg/ipa/pr51759.C execution test
+PASS: g++.dg/torture/pr51344.C  -O0  (test for excess errors)
+PASS: g++.dg/torture/pr51344.C  -O1  (test for excess errors)
+PASS: g++.dg/torture/pr51344.C  -O2  (test for excess errors)
+PASS: g++.dg/torture/pr51344.C  -O2 -flto  (test for excess errors)
+PASS: g++.dg/torture/pr51344.C  -O2 -fwhopr  (test for excess errors)
+PASS: g++.dg/torture/pr51344.C  -O3 -fomit-frame-pointer  (test for excess errors)
+PASS: g++.dg/torture/pr51344.C  -O3 -g  (test for excess errors)
+PASS: g++.dg/torture/pr51344.C  -Os  (test for excess errors)
+PASS: gcc.c-torture/execute/20120111-1.c compilation,  -O0
+PASS: gcc.c-torture/execute/20120111-1.c compilation,  -O1
+PASS: gcc.c-torture/execute/20120111-1.c compilation,  -O2
+PASS: gcc.c-torture/execute/20120111-1.c compilation,  -O2 -flto
+PASS: gcc.c-torture/execute/20120111-1.c compilation,  -O2 -fwhopr
+PASS: gcc.c-torture/execute/20120111-1.c compilation,  -O3 -fomit-frame-pointer
+PASS: gcc.c-torture/execute/20120111-1.c compilation,  -O3 -g
+PASS: gcc.c-torture/execute/20120111-1.c compilation,  -Os
+PASS: gcc.c-torture/execute/20120111-1.c execution,  -O0
+PASS: gcc.c-torture/execute/20120111-1.c execution,  -O1
+PASS: gcc.c-torture/execute/20120111-1.c execution,  -O2
+PASS: gcc.c-torture/execute/20120111-1.c execution,  -O2 -flto
+PASS: gcc.c-torture/execute/20120111-1.c execution,  -O2 -fwhopr
+PASS: gcc.c-torture/execute/20120111-1.c execution,  -O3 -fomit-frame-pointer
+PASS: gcc.c-torture/execute/20120111-1.c execution,  -O3 -g
+PASS: gcc.c-torture/execute/20120111-1.c execution,  -Os
+PASS: gcc.c-torture/execute/doloop-1.c compilation,  -O0
+PASS: gcc.c-torture/execute/doloop-1.c compilation,  -O1
+PASS: gcc.c-torture/execute/doloop-1.c compilation,  -O2
+PASS: gcc.c-torture/execute/doloop-1.c compilation,  -O2 -flto
+PASS: gcc.c-torture/execute/doloop-1.c compilation,  -O2 -fwhopr
+PASS: gcc.c-torture/execute/doloop-1.c compilation,  -O3 -fomit-frame-pointer
+PASS: gcc.c-torture/execute/doloop-1.c compilation,  -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions
+PASS: gcc.c-torture/execute/doloop-1.c compilation,  -O3 -fomit-frame-pointer -funroll-loops
+PASS: gcc.c-torture/execute/doloop-1.c compilation,  -O3 -g
+PASS: gcc.c-torture/execute/doloop-1.c compilation,  -Os
+PASS: gcc.c-torture/execute/doloop-1.c execution,  -O0
+PASS: gcc.c-torture/execute/doloop-1.c execution,  -O1
+PASS: gcc.c-torture/execute/doloop-1.c execution,  -O2
+PASS: gcc.c-torture/execute/doloop-1.c execution,  -O2 -flto
+PASS: gcc.c-torture/execute/doloop-1.c execution,  -O2 -fwhopr
+PASS: gcc.c-torture/execute/doloop-1.c execution,  -O3 -fomit-frame-pointer
+PASS: gcc.c-torture/execute/doloop-1.c execution,  -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions
+PASS: gcc.c-torture/execute/doloop-1.c execution,  -O3 -fomit-frame-pointer -funroll-loops
+PASS: gcc.c-torture/execute/doloop-1.c execution,  -O3 -g
+PASS: gcc.c-torture/execute/doloop-1.c execution,  -Os
+PASS: gcc.c-torture/execute/doloop-2.c compilation,  -O0
+PASS: gcc.c-torture/execute/doloop-2.c compilation,  -O1
+PASS: gcc.c-torture/execute/doloop-2.c compilation,  -O2
+PASS: gcc.c-torture/execute/doloop-2.c compilation,  -O2 -flto
...and 36 more

The full diff is at:
 http://ex.seabright.co.nz/build/gcc-linaro-4.5+bzr99560~ams-codesourcery~merge-from-fsf-4.5-20120201/logs/x86_64-natty-cbuild238-oort1-x86_64r1/testsuite-diff.txt

The full testsuite results are at:
 http://ex.seabright.co.nz/build/gcc-linaro-4.5+bzr99560~ams-codesourcery~merge-from-fsf-4.5-20120201/logs/x86_64-natty-cbuild238-oort1-x86_64r1/gcc-testsuite.txt

cbuild-checked: x86_64-natty-cbuild238-oort1-x86_64r1