[llvm-bugs] [Bug 28751] New: MI Parser can't read in block frequencies

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=28751

            Bug ID: 28751
           Summary: MI Parser can't read in block frequencies
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Common Code Generator Code
          Assignee: unassignedbugs at nondot.org
          Reporter: diana.picus at linaro.org
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 16829
  --> https://llvm.org/bugs/attachment.cgi?id=16829&action=edit
mir file that can't be read by llc

llc -mtriple=aarch64-unknown buggy.mir              
error: buggy.mir:50:39: unexpected character '/'
    successors: %bb.1.true(0x40000000 / 0x80000000 = 50.00%),
%bb.2.false(0x40000000 / 0x80000000 = 50.00%)
                                      ^

LLVM ERROR: Unable to initialize machine function


The input mir file was obtained by running llc -mtriple=aarch64-unknown
-stop-after=block-placement <some .ll file> -o buggy.mir.

If we remove the block frequencies from the file, it manages to read it, but
the output that it produces also contains block frequencies, so it can't be
read back in.

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