http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53774
Bug #: 53774
Summary: Reassociator generates non-canonical addition
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: wschm...@gcc.gnu.org
CC: berg...@vnet.ibm.com, rguent...@suse.de
There is one test in the regression testsuite for which the reassociator
generates a GIMPLE addition that is not canonical. Specifically, it generates
an add where rhs1 is a constant and rhs2 is an SSA name. The test is:
gcc.c-torture/compiler/pr41634.c
The generated GIMPLE includes:
D.1393_7 = 4294967293 + fp_6(D);
Probably best just to run this test from the testsuite to reproduce, but here
is the command I used.
/home/wschmidt/gcc/build/gcc-mainline-slsrpt1a/gcc/xgcc
-B/home/wschmidt/gcc/build/gcc-mainline-slsrpt1a/gcc/
-fno-diagnostics-show-caret -O0 -w -c -m32 -o pr41634.o
/home/wschmidt/gcc/gcc-mainline-slsrpt1a/gcc/testsuite/gcc.c-torture/compile/pr41634.c
