https://bugs.llvm.org/show_bug.cgi?id=37887
Bug ID: 37887
Summary: Scimark miscompile with instcombine+gvn
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: cs12b1...@iith.ac.in
CC: llvm-bugs@lists.llvm.org
Change directory to test-suite/MultiSource/Benchmarks/SciMark2-C
clang -m64 -O3 -flto -fuse-ld=lld -c *.c
clang -m64 -O3 -flto -fuse-ld=lld *.o -Wl,-save-temps -lm
opt -inline-threshold=1000000 -inline -instcombine -gvn
a.out.0.2.internalize.bc -o b.bc
llc -O3 -filetype=asm b.bc
clang b.s -lm
./a.out
Segmentation fault.
Program received signal SIGSEGV, Segmentation fault.
0x0000000000220468 in SOR_execute (omega=1.25, M=<optimized out>, N=<optimized
out>, G=<optimized out>, num_iterations=<optimized out>)
at /home/pbhatu/test-suite/MultiSource/Benchmarks/SciMark2-C/SOR.c:37
37 Gi[j] = omega_over_four * (Gim1[j] + Gip1[j] +
Gi[j-1]
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