[LLVMbugs] [Bug 11685] New: clang ignores -funsafe-math-optimizations, -ffast-math, etc

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Sun Jan 1 09:28:08 PST 2012


             Bug #: 11685
           Summary: clang ignores -funsafe-math-optimizations,
                    -ffast-math, etc
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Driver
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: benny.kra at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

The clang driver currently doesn't pass information about unsafe fp
optimizations down into codegen (llvm-gcc got this right). Many benchmarks are
compiled with -ffast-math so this could be an easy perf win for clang.

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