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[PowerPC] Add comment explaining preprocessor directive. 

llvm-svn: 187320
This commit is contained in:
Bill Schmidt 2013-07-28 03:23:32 +00:00
parent 20573225ed
commit 40f78a2a86
1 changed files with 2 additions and 0 deletions
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2
llvm/lib/Target/PowerPC/PPCJITInfo.cpp
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@ -71,6 +71,8 @@ static void EmitBranchToAt(uint64_t At, uint64_t To, bool isCall, bool is64Bit){
extern "C" void PPC32CompilationCallback();
extern "C" void PPC64CompilationCallback();
// The first clause of the preprocessor directive looks wrong, but it is
// necessary when compiling this code on non-PowerPC hosts.
#if (!defined(__ppc__) && !defined(__powerpc__)) || defined(__powerpc64__) || defined(__ppc64__)
void PPC32CompilationCallback() {
llvm_unreachable("This is not a 32bit PowerPC, you can't execute this!");