[llvm-bugs] [Bug 40743] New: [MIR] Bad MF Property with -start-before=codegenprepare

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=40743

            Bug ID: 40743
           Summary: [MIR]  Bad MF Property with
                    -start-before=codegenprepare
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Common Code Generator Code
          Assignee: unassignedbugs at nondot.org
          Reporter: paulsson at linux.vnet.ibm.com
                CC: llvm-bugs at lists.llvm.org

The llc input file is under test/CodeGen/SystemZ/

This works fine:

llc -mtriple=s390x-linux-gnu -mcpu=z10 fp-conv-18.ll -o - -verify-machineinstrs

But this results in an error:

llc -mtriple=s390x-linux-gnu -mcpu=z10 fp-conv-18.ll -o tc.mir
-stop-before=codegenprepare

llc -mtriple=s390x-linux-gnu -mcpu=z10 tc.mir -o - -verify-machineinstrs
-start-before=codegenprepare


# After Instruction Selection
# Machine code for function fun1: IsSSA, NoPHIs, TracksLiveness, NoVRegs

bb.0.bb:
  %1:addr64bit = IMPLICIT_DEF
  %0:fp64bit = LDEB killed %1:addr64bit, 0, $noreg :: (load 4 from `<4 x
float>* undef` + 12, align 16)
  %2:gr64bit = LARL @.str
  $r2d = COPY %2:gr64bit
  $f0d = COPY %0:fp64bit
  %3:fp64bit = IMPLICIT_DEF
  $f2d = COPY %3:fp64bit
  $f4d = COPY %0:fp64bit
  %4:fp64bit = IMPLICIT_DEF
  $f6d = COPY %4:fp64bit
  CallJG @printf, <regmask $f8d $f9d $f10d $f11d $f12d $f13d $f14d $f15d $f8q
$f9q $f12q $f13q $f8s $f9s $f10s $f11s $f12s $f13s $f14s $f15s $r6d $r7d $r8d
$r9d $r10d $r11d $r12d $r13d $r14d $r15d $r6h $r7h $r8h and 22 more...>,
implicit $r2d, implicit $f0d, implicit $f2d, implicit $f4d, implicit $f6d

# End machine code for function fun1.

*** Bad machine code: Function has NoVRegs property but there are VReg operands
***
- function:    fun1
LLVM ERROR: Found 1 machine code errors.

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