[Bug rtl-optimization/41862] [4.5 Regression] -fgcse-sm causes bootstrap comparison failures

[zsojka at seznam dot cz]

------- Comment #7 from zsojka at seznam dot cz  2009-11-27 11:23 -------
My fault for not using -fgcse-sm in BOOT_CFLAGS. With that, it gets worse:
$ nice -n 19 make -j3 BOOT_CFLAGS="-O2 -fgcse-sm"

Comparing stages 2 and 3
warning: gcc/cc1plus-checksum.o differs
warning: gcc/cc1-checksum.o differs
Bootstrap comparison failure!
gcc/cp/pt.o differs
gcc/explow.o differs
gcc/tree-into-ssa.o differs
gcc/bitmap.o differs
gcc/dwarf2out.o differs
gcc/double-int.o differs
gcc/ipa-prop.o differs
gcc/stor-layout.o differs
libdecnumber/decimal128.o differs
libdecnumber/decimal32.o differs
libdecnumber/decimal64.o differs
libdecnumber/decNumber.o differs
x86_64-unknown-linux-gnu/32/libgcc/trunctfxf2_s.o differs
x86_64-unknown-linux-gnu/32/libgcc/multf3_s.o differs
x86_64-unknown-linux-gnu/32/libgcc/multf3.o differs
x86_64-unknown-linux-gnu/32/libgcc/fixtfsi_s.o differs
x86_64-unknown-linux-gnu/32/libgcc/bid128_div.o differs


-- 

zsojka at seznam dot cz changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|valgrind warns about using  |[4.5 Regression] -fgcse-sm
                   |uninitialized variable with |causes bootstrap comparison
                   |-fgcse-sm                   |failures


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41862