------- Comment #2 from janis at gcc dot gnu dot org 2009-01-30 20:44 ------- Created an attachment (id=17214) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17214&action=view) expanded testcase
I expanded the testcase to test both constant folding and runtime calculations for all three decimal float types. The problem occurs with 4.3.3 but not with mainline. I can track down the patch that fixed it if anyone is interested. Test results for trunk and 4.3 for powerpc64-linux and x86-linux (bid and dpd): elm3b187% uname -m ppc64 elm3b187% /opt/gcc-nightly/trunk/bin/gcc -DDBG -O2 -std=gnu99 39034.c && ./a.out elm3b187% /opt/gcc-nightly/4.3/bin/gcc -DDBG -O2 -std=gnu99 39034.c && ./a.out line 29: runtime: d32 should be zero line 42: runtime: d64 should be zero line 56: runtime: d128 should be zero Aborted laptop% uname -m i686 laptop% /home/janis/tools/gcc-trunk-bid/bin/gcc -DDBG -O2 -std=gnu99 39034.c && ./a.out laptop% /home/janis/tools/gcc-trunk-dpd/bin/gcc -DDBG -O2 -std=gnu99 39034.c && ./a.out laptop% /home/janis/tools/gcc-4.3.3-bid/bin/gcc -DDBG -O2 -std=gnu99 39034.c && ./a.out line 29: runtime: d32 should be zero line 42: runtime: d64 should be zero line 56: runtime: d128 should be zero Aborted (core dumped) laptop% /home/janis/tools/gcc-4.3.3-dpd/bin/gcc -DDBG -O2 -std=gnu99 39034.c && ./a.out line 29: runtime: d32 should be zero line 42: runtime: d64 should be zero line 56: runtime: d128 should be zero Aborted (core dumped) -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39034
