[LLVMbugs] [Bug 17555] New: Clang does not define __ARM_ARCH_EXT_IDIV__ for cortex-a15

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=17555

            Bug ID: 17555
           Summary: Clang does not define __ARM_ARCH_EXT_IDIV__ for
                    cortex-a15
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: srhines at google.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Clang should be defining __ARM_ARCH_EXT_IDIV__ to enable hardware division on
ARM cortex-a15 processors. Without this define, compiler-rt cannot be used to
generate sdiv/udiv instructions. The current version of compiler-rt actually
predicates hardware division on an APPLE-only macro for V7S (which is only for
their Swift part).

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