https://llvm.org/bugs/show_bug.cgi?id=25859
Bug ID: 25859
Summary: MSVC: Segfault witch cleanupret to catchswitch
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Backend: X86
Assignee: unassignedbugs at nondot.org
Reporter: alex at crichton.co
CC: llvm-bugs at lists.llvm.org
Classification: Unclassified
The following IR is reduced greatly from a Rust program, and I'm not 100% sure
if it's legal. Currently when compiled, however, it will segfault. When the
call to GetProcessHeap is omitted it will not segfault oddly enough.
target triple = "i686-pc-windows-msvc"
declare i32 @_except_handler3(...)
declare x86_stdcallcc void @RaiseException(i32, i32, i32, i64*)
declare x86_stdcallcc i8* @GetProcessHeap()
define i32 @main() personality i32 (...)* @_except_handler3 {
top:
invoke x86_stdcallcc void @RaiseException(i32 5395284, i32 0, i32 0, i64*
null)
to label %impossible unwind label %cleanup
impossible:
unreachable
cleanup:
%cleanuppad = cleanuppad within none []
%t = tail call x86_stdcallcc i8* @GetProcessHeap()
cleanupret from %cleanuppad unwind label %catchswitch
catchswitch:
%cs = catchswitch within none [label %catchpad] unwind to caller
catchpad:
%cp = catchpad within %cs [i8* bitcast (i32 ()* @filter to i8*)]
catchret from %cp to label %exit
exit:
ret i32 101
}
define internal i32 @filter() {
entry-block:
ret i32 1
}
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