http://llvm.org/bugs/show_bug.cgi?id=4366
Summary: instcombine and simplifycfg mishandle stores to null in
non-zero address-space
Product: new-bugs
Version: unspecified
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: new bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Testcase:
define void @a() {
store i32 0, i32 addrspace(1)* null
ret void
}
simplifycfg illegally turns this into "unreachable", and instcombine illegally
turns this into a store of an undef value. Neither transformation should touch
this store: there should be a check for the address-space, similar to the check
in InstCombiner::visitLoadInst.
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