[Bug 449] New: Shark generates bogus phi instruction LLVM IR for java.lang.Shutdown::shutdown

[bugzilla-daemon at icedtea.classpath.org]

http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=449

           Summary: Shark generates bogus phi instruction LLVM IR for
                    java.lang.Shutdown::shutdown
           Product: IcedTea
           Version: 6-hg
          Platform: all
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Shark
        AssignedTo: unassigned at icedtea.classpath.org
        ReportedBy: xerxes at zafena.se


Run any program with JIT CompileThreshold=1

xerxes at xerxes-J464X:~/cm30$
/home/xerxes/icedtea6-build-shark-sharedllvm/openjdk/build/linux-i586/bin/java
-XX:+PrintCompilation -XX:CompileThreshold=1 -Xbatch CaffeineMarkEmbeddedApp

then type Ctrl-c to make the jvm start jitting java.lang.Shutdown::shutdown
Snd shark will fail with:
573  !b   java.lang.Shutdown::shutdown (73 bytes)
574  !b   java.lang.Shutdown::sequence (61 bytes)
java: /usr/local/include/llvm/Instructions.h:1848: void
llvm::PHINode::addIncoming(llvm::Value*, llvm::BasicBlock*): Assertion
`getType() == V->getType() && "All operands to PHI node must be the same type
as the PHI node!"' failed.
Avbruten (SIGABRT) (minnesutskrift skapad)

If you dump the LLVM IR for java.lang.Shutdown::shutdown and try to assemble it
then you can see that shark have inserted bogus phi instructions.

xerxes at xerxes-J464X:~$ llvm-as < java.lang.Shutdown::shutdown.ll
llvm-as: <stdin>:234:3: error: expected '[' in phi value list
  %local_0_33 = phi [8 x i8]*                     ; <[8 x i8]*> [#uses=2]


the problematic LLVM IR are:
bci_48:                                           ; No predecessors!
  %method32 = phi [84 x i8]*                      ; <[84 x i8]*> [#uses=2] <-
here
  %local_0_33 = phi [8 x i8]*                     ; <[8 x i8]*> [#uses=2] <-
here
  %stack_0_ = phi [8 x i8]*                       ; <[8 x i8]*> [#uses=2]    <-
 and here!
  %108 = getelementptr inbounds [13 x i32]* %frame, i32 0, i32 2 ; <i32*>
[#uses=1]

the phi instructions needs a argument 
http://www.llvm.org/docs/LangRef.html#i_phi


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