[llvm-bugs] [Bug 49638] New: [BasicAA] @llvm.annotation implies MustMod

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=49638

            Bug ID: 49638
           Summary: [BasicAA] @llvm.annotation implies MustMod
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: clement.courbet at gmail.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org

@llvm.annotation is supposed to be ignored by code generation and optimization:
https://llvm.org/docs/LangRef.html#llvm-annotation-intrinsic

However BasicAA considers that it may write to memory, so loads cannot be moved
across annotations.

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