[llvm-bugs] [Bug 25929] New: Reading and writing bitcode is slow

via llvm-bugs llvm-bugs at lists.llvm.org
Tue Dec 22 16:08:06 PST 2015


            Bug ID: 25929
           Summary: Reading and writing bitcode is slow
           Product: new-bugs
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: rafael.espindola at gmail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Doing a LTO link of clang with plugin-opt=emit-llvm takes 26 seconds on my

Just running "opt -disable-verify test.bc -o test2.bc
-preserve-bc-uselistorder=false" with the output of the clang lto takes 20

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