[llvm-bugs] [Bug 37952] New: Miscompile with -basicaa-recphi=1 -gvn
via llvm-bugs
llvm-bugs at lists.llvm.org
Wed Jun 27 04:44:36 PDT 2018
https://bugs.llvm.org/show_bug.cgi?id=37952
Bug ID: 37952
Summary: Miscompile with -basicaa-recphi=1 -gvn
Product: new-bugs
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: new bugs
Assignee: unassignedbugs at nondot.org
Reporter: bjorn.a.pettersson at ericsson.com
CC: llvm-bugs at lists.llvm.org
Created attachment 20473
--> https://bugs.llvm.org/attachment.cgi?id=20473&action=edit
reproducer
The attached llvm-lit adapted test case fails for the RUN line using
"-basicaa-recphi=1 -gvn". Afaict it is a miscompile.
Note that -basicaa-recphi seems to have been defaulted to 0 since it was
introduced in 2015 (r242320). If it turns out that the fault is related to that
option, maybe the easy solution is to remove it?
The problem was detected when doing fuzzy testing using randomized options
(normally we don't use -basicaa-recphi=1).
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