[llvm-bugs] [Bug 34847] New: Csmith program gives bad checksum with -optimize-regalloc=false
llvm-bugs at lists.llvm.org
Thu Oct 5 08:55:05 PDT 2017
Bug ID: 34847
Summary: Csmith program gives bad checksum with
Component: Register Allocator
Assignee: unassignedbugs at nondot.org
Reporter: paulsson at linux.vnet.ibm.com
CC: llvm-bugs at lists.llvm.org
Created attachment 19241
I have reduced a csmith program that prints
bin/clang -O3 -march=z13 tc_regalloc.bc -o a.out -w ; ./a.out
checksum = 3FB78BC1
bin/clang -O3 -march=z13 tc_regalloc.bc -o a.out -w -mllvm
-optimize-regalloc=false ; ./a.out
checksum = 9E0D2F27
I had originally made a batch run with 14 different compilations with many
randomized options, which all had the 3FB... checksum, so therefore I would
guess that any other checksum is wrong.
I have used bugpoint with a script that checks the checksums for every bugpoint
program, so I am not sure if doing so is the best thing, but the checksums are
the same as for the original program.
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