https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115766
Bug ID: 115766
Summary: [12/13/14 Regression] wrong code at optimization
levels -O2, -O3
Product: gcc
Version: 12.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: bic60176 at gmail dot com
Target Milestone: ---
Created attachment 58579
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58579&action=edit
testcase
OS: Ubuntu 22.04.3 LTS
We found that there are discrepancies when compiling with gcc-14.1.0,
gcc-13.2.0, gcc-12.3.0 at optimization levels -O2 and -O3.
$ ../compiler-builds/gcc-12.3.0_build/bin/gcc -fsanitize=undefined
-fsanitize=address -g -lgcc_s -I/home/csmith/include/csmith-2.3.0 -O2
testcase.c -o exec
$ timeout 1s ./exec 2>exec.err
checksum = 3BA9B585
$ ../compiler-builds/gcc-12.3.0_build/bin/gcc -fsanitize=undefined
-fsanitize=address -g -lgcc_s -I/home/csmith/include/csmith-2.3.0 -O0
testcase.c -o exec
$ timeout 1s ./exec 2>exec.err
checksum = 8861541D
