Add target hook CodeGen queries when generating builtin pow*.
Without fmath-errno, Clang currently generates calls to @llvm.pow.* intrinsics
when it sees pow*(). This may not be suitable for all targets (for
example le32/PNaCl), so the attached patch adds a target hook that CodeGen
queries. The target can state its preference for having or not having the
intrinsic generated. Non-PNaCl behavior remains unchanged;
PNaCl-specific test added.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@185568 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/TargetInfo.h b/lib/CodeGen/TargetInfo.h
index a7fb886..1be7f4d 100644
--- a/lib/CodeGen/TargetInfo.h
+++ b/lib/CodeGen/TargetInfo.h
@@ -74,6 +74,10 @@
/// through such registers.
virtual bool extendPointerWithSExt() const { return false; }
+ /// Controls whether BIpow* emit an intrinsic call instead of a library
+ /// function call.
+ virtual bool emitIntrinsicForPow() const { return true; }
+
/// Determines the DWARF register number for the stack pointer, for
/// exception-handling purposes. Implements __builtin_dwarf_sp_column.
///