http://llvm.org/bugs/show_bug.cgi?id=16457
Bug ID: 16457
Summary: sccp miscompile (t8499 case from PR16431)
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Scalar Optimizations
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 10768
--> http://llvm.org/bugs/attachment.cgi?id=10768&action=edit
bugpoint reduced test case and input file
SCCP miscompiles the attached input (there is an input text file read by the
program which demonstrates the problem). This is the t8499 case from PR16431.
Specifically, if you run:
opt -sccp -mcpu=x86-64 bugpoint-passinput.ll
Then the resulting program segmentation faults.
whereas compiling it without running sccp, the resulting program outputs:
res = 953903788
Unfortunately, bugpoint crashes when attempting to further reduce the test case
:(
-- but at least it was able to isolate the relevant pass.
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