Regressions on trunk (power7) at revision 234978 vs revision 234958 on yavin3.rch.stglabs.ibm.com

[Bill Seurer on yavin3 (POWER7)]

New failures:

New passes:
FAIL: StackTrace2 -O3 output - source compiled test
FAIL: StackTrace2 -findirect-dispatch output - source compiled test
FAIL: StackTrace2 output - source compiled test
FAIL: getlocalvartable output
FAIL: go.test/test/ken/cplx2.go execution,  -O2 -g 
FAIL: go.test/test/ken/cplx2.go execution,  -O2 -g 
FAIL: libgomp.c++/for-13.C execution test
FAIL: libgomp.fortran/allocatable1.f90   -O0  execution test
FAIL: libgomp.fortran/cancel-do-1.f90   -O2  execution test
FAIL: runtime
FAIL: sync/atomic