[LLVMbugs] [Bug 23832] New: Switch statement lowering leads to incorrect profile data.

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=23832

            Bug ID: 23832
           Summary: Switch statement lowering leads to incorrect profile
                    data.
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: LLVM Codegen
          Assignee: unassignedclangbugs at nondot.org
          Reporter: congh at google.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

In lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp, switch statements are
lowered to nested if statements or jump table. When building those if
statements, the original edge weights information are lost, leading to
incorrect block frequencies/branch probabilities in generated code.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20150612/84d19b7b/attachment.html>