[Bug rtl-optimization/50063] [4.6/4.7 Regression] DSE: wrong code for gcc.dg/torture/pta-ptrarith-3.c

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50063

--- Comment #19 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2012-02-20 13:41:39 UTC ---
FYI, after updating to SVN 184386 (2012-02-20) I see 14 new FAILs in the avr
test suite; all of which can be cured with -fno-dse:

FAIL: gcc.c-torture/execute/20020215-1.c execution,  -O1 
FAIL: gcc.c-torture/execute/20020215-1.c execution,  -Os 

FAIL: gcc.c-torture/execute/930126-1.c execution,  -O1 

FAIL: gcc.c-torture/execute/991118-1.c execution,  -O1 
FAIL: gcc.c-torture/execute/991118-1.c execution,  -Os 

FAIL: gcc.c-torture/execute/bf64-1.c execution,  -O1 
FAIL: gcc.c-torture/execute/bf64-1.c execution,  -Os 

FAIL: gcc.c-torture/execute/pr51877.c execution,  -O1 
FAIL: gcc.c-torture/execute/pr51877.c execution,  -O2 
FAIL: gcc.c-torture/execute/pr51877.c execution,  -O3 -fomit-frame-pointer 
FAIL: gcc.c-torture/execute/pr51877.c execution,  -O3 -g 
FAIL: gcc.c-torture/execute/pr51877.c execution,  -Os 
plugin -flto-partition=none 
FAIL: gcc.c-torture/execute/pr51877.c execution,  -O2 -flto
-fno-use-linker-plugin -flto-partition=none 
FAIL: gcc.c-torture/execute/pr51877.c execution,  -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects