[LLVMbugs] [Bug 22859] New: LLVM ERROR: Cannot select: 0x3aafd10: ch = brind 0x3a59270, 0x3aaf9e0 [ORD=3] [ID=3]

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=22859

            Bug ID: 22859
           Summary: LLVM ERROR: Cannot select: 0x3aafd10: ch = brind
                    0x3a59270, 0x3aaf9e0 [ORD=3] [ID=3]
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: hjl.tools at gmail.com
                CC: llvmbugs at cs.uiuc.edu, michael.m.kuperstein at intel.com
    Classification: Unclassified

[hjl at gnu-6 bin]$ cat /tmp/x.ll 
define i8 @test1() nounwind ssp {
entry:
  %0 = select i1 undef, i8* blockaddress(@test1, %bb), i8* blockaddress(@test1,
%bb6) ; <i8*> [#uses=1]
  indirectbr i8* %0, [label %bb, label %bb6]

bb:                                               ; preds = %entry
  ret i8 1

bb6:                                              ; preds = %entry
  ret i8 2
}

[hjl at gnu-6 bin]$ ./llc -mtriple=x86_64-linux-gnux32 -O2 < /tmp/x.ll
    .text
    .file    "<stdin>"
LLVM ERROR: Cannot select: 0x3aafd10: ch = brind 0x3a59270, 0x3aaf9e0 [ORD=3]
[ID=3]
  0x3aaf9e0: i32 = X86ISD::Wrapper 0x3aaff30 [ID=2]
    0x3aaff30: i32 = TargetBlockAddress<@test1, %bb6> 0 [ID=1]
In function: test1
[hjl at gnu-6 bin]$ 

Since x32 programs run in the 64-bit mode, there is no 32-bit indirect
branch. X32 should lower 32-bit indirect branch by loading the destination
of indirect branch into a 32-bit register first, which is zero-extended to
64 bits by hardware, and perform indirect branch via 64-bit register.

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