Put llvm.powi in the dev list of intrinsics.

lib/Analysis/NaCl/PNaClABIVerifyModule.cpp

 //===- PNaClABIVerifyModule.cpp - Verify PNaCl ABI rules --------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // Verify module-level PNaCl ABI requirements (specifically those that do not
@@ skipping 156 matching lines @@
     case Intrinsic::eh_dwarf_cfa: // For EH tests.
     case Intrinsic::exp: // Rounding not defined: support with fast-math?
     case Intrinsic::exp2: // Rounding not defined: support with fast-math?
     case Intrinsic::expect: // From __builtin_expect.
     case Intrinsic::flt_rounds:
     case Intrinsic::frameaddress: // Support for 0-level or not?
     case Intrinsic::log: // Rounding not defined: support with fast-math?
     case Intrinsic::log2: // Rounding not defined: support with fast-math?
     case Intrinsic::log10: // Rounding not defined: support with fast-math?
     case Intrinsic::nacl_target_arch: // Used by translator self-build.
-    case Intrinsic::pow: // Rounding not defined: support with fast-math?
+    case Intrinsic::pow: // Rounding is supposed to be the same as libm.
+    case Intrinsic::powi: // Rounding not defined: support with fast-math?
     case Intrinsic::prefetch: // Could ignore if target doesn't support?
     case Intrinsic::returnaddress: // Support for 0-level or not?
     case Intrinsic::sin: // Rounding not defined: support with fast-math?
     case Intrinsic::sqrt:
     case Intrinsic::stackrestore: // Used to support C99 VLAs.
     case Intrinsic::stacksave:
     // the *_with_overflow return struct types, so we'll need to fix these.
     case Intrinsic::sadd_with_overflow: // Introduced by -ftrapv
     case Intrinsic::ssub_with_overflow:
     case Intrinsic::uadd_with_overflow:
@@ skipping 113 matching lines @@
 }
 
 char PNaClABIVerifyModule::ID = 0;
 INITIALIZE_PASS(PNaClABIVerifyModule, "verify-pnaclabi-module",
                 "Verify module for PNaCl", false, true)
 
 ModulePass *llvm::createPNaClABIVerifyModulePass(
     PNaClABIErrorReporter *Reporter) {
   return new PNaClABIVerifyModule(Reporter);
 }