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Make the host endianness check an integer constant expression.

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I will remove the isBigEndianHost function once I update clang.

The ifdef logic is designed to
* not use configure/cmake to avoid breaking -arch i686 -arch ppc.
* default to little endian
* be as small as possible

It looks like sys/endian.h is the preferred header on most modern BSD systems,
but it is better to change this in a followup patch as machine/endian.h is
available on FreeBSD, OpenBSD, NetBSD and OS X.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179527 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2013-04-15 14:44:24 +00:00
parent 604b3573f9
commit 21a01d1ea8
8 changed files with 30 additions and 22 deletions
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4
include/llvm/ADT/Hashing.h
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@@ -151,7 +151,7 @@ namespace detail {
inline uint64_t fetch64(const char *p) {
uint64_t result;
memcpy(&result, p, sizeof(result));
if (sys::isBigEndianHost())
if (sys::IsBigEndianHost)
return sys::SwapByteOrder(result);
return result;
}
@@ -159,7 +159,7 @@ inline uint64_t fetch64(const char *p) {
inline uint32_t fetch32(const char *p) {
uint32_t result;
memcpy(&result, p, sizeof(result));
if (sys::isBigEndianHost())
if (sys::IsBigEndianHost)
return sys::SwapByteOrder(result);
return result;
}