[llvm-bugs] [Bug 37565] New: [llvm-exegesis] Wrong serial chain generated.

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=37565

            Bug ID: 37565
           Summary: [llvm-exegesis] Wrong serial chain generated.
           Product: new-bugs
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: courbet at google.com
                CC: llvm-bugs at lists.llvm.org

CVTSS2SDrr_Int only reads from one operand and only writes to the other
operand. A serial chain requires the two operands to be the same.

I guess the instruction incorrectly specifies a read from the operand it writes
to.


---
key:             
  opcode_name:     CVTSS2SDrr_Int
  mode:            latency
  config:          ''
cpu_name:        haswell
llvm_triple:     x86_64-unknown-linux-gnu
num_repetitions: 10000
measurements:    
  - { key: latency, value: 1.0089, debug_string: '' }
error:           ''
info:            'explicit self cycles, selecting one aliasing configuration.
Snippet:
CVTSS2SDrr_Int XMM6, XMM6, XMM11
'
...

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