http://llvm.org/bugs/show_bug.cgi?id=8624
Summary: Possible llvm problem when ModulePass requires
FunctionPasses
Product: new-bugs
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: new bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Created an attachment (id=5786)
--> (http://llvm.org/bugs/attachment.cgi?id=5786)
Experimental Pass
Consider a case when a module pass requires two function passes fp1, fp2. When
getAnalysis<fp1>() is called, both fp1 and fp2 are executed. That is fine. In
the worst case, we just spend lots of time running the analysis passes many
times.
But it should not crash. In the experimental pass, command "opt" got an
assertion.
The experimental pass is attached. Using the following command:
$ opt -load LLVMTestPass.so -mpass x.bc -o y.bc
got:
MyFPass running on __cxx_global_var_init
MyFPass2 running on __cxx_global_var_init
opt:
/developer/home2/zsth/projects/llvm.org/llvm/include/llvm/PassAnalysisSupport.h:239:
AnalysisType& llvm::Pass::getAnalysisID(const void*, llvm::Function&) [with
AnalysisType = MyFPass]: Assertion `ResultPass && "Unable to find requested
analysis info"' failed.
Seems the function pass fp1 and fp2 were correctly invoked by the module pass,
but why it dumped the assertion at last.
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