http://llvm.org/bugs/show_bug.cgi?id=16528
Bug ID: 16528
Summary: llc -O0 producing incorrect binary where llc -O2 and
gcc produce correct code
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Backend: X86
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 10810
--> http://llvm.org/bugs/attachment.cgi?id=10810&action=edit
csmith-produced testcase
Attached testcase produced by csmith; this is claimed to not have any undefined
behavior. A correct binary produces
checksum = 55A8B9C3
gcc produces a correct binary, as does clang with any optimizations, as does
clang test.c -O0 -emit-llvm | llc -O1 - | clang -x assembler -
but llc -O0 produces an incorrect binary.
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