[Bug fortran/38044] -O1/-O2/-O3 -fgraphite-identity causes ICE when compiling induct.f90 Polyhedron 2005 benchmark

[howarth at nitro dot med dot uc dot edu]

------- Comment #1 from howarth at nitro dot med dot uc dot edu  2008-11-07 02:36 -------
The nf.f90 Polyhedron 2005 benchmark ICEs with "-O2 -fgraphite-identity" and
"-O3 -fgraphite-identity" with the same error...

nf.f90: In function ‘mattest’:
nf.f90:95: error: definition in block 43 does not dominate use in block 106
for SSA_NAME: HEAP.730_727 in statement:
HEAP.730_116 = PHI <HEAP.730_727(106)>
PHI argument
HEAP.730_727
for PHI node
HEAP.730_116 = PHI <HEAP.730_727(106)>
nf.f90:95: internal compiler error: verify_ssa failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

At "-O1 -fgraphite-identity", the ICE is a bus error...

nf.f90: In function ‘nfcg’:
nf.f90:150: internal compiler error: Bus error
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

The ICE doesn't occur at "-O0 -fgraphite-identity"


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38044