http://llvm.org/bugs/show_bug.cgi?id=4170
Summary: llc crashes when emitting code for variable sized (zero
length) array
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]
Created an attachment (id=2967)
--> (http://llvm.org/bugs/attachment.cgi?id=2967)
test case
Hi
llc crashes on this test case with an assertion failure (.bc file is attached)
define void @test([0 x i32] %x) {
entry:
%y = extractvalue [0 x i32] %x, 0
ret void
}
llc:
/home/julian/rcs-data/llvm-svn/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:4011:
llvm::SDVTList llvm::SelectionDAG::getVTList(const llvm::MVT*, unsigned int):
Assertion `0 && "Cannot have nodes without results!"' failed.
I am using a fresh SVN checkout:
$ llc --version
Low Level Virtual Machine (http://llvm.org/):
llvm version 2.6svn
Optimized build with assertions.
Built May 7 2009(01:19:30).
I am not very familiar with the internals of LLVM but the problem might be that
ComputeValueVTs in SelectionDAGBuild.cpp thinks that a zero length array
comprises of no types.
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