Add support to the C backend for llvm.prefetch. Patch contributed by
Justin Wick!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20378 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp
index 46f0335..e2431a2 100644
--- a/lib/Target/CBackend/CBackend.cpp
+++ b/lib/Target/CBackend/CBackend.cpp
@@ -807,6 +807,7 @@
<< "#define LLVM_NANSF(NanStr) __builtin_nansf(NanStr) /* Float */\n"
<< "#define LLVM_INF __builtin_inf() /* Double */\n"
<< "#define LLVM_INFF __builtin_inff() /* Float */\n"
+ << "#define LLVM_PREFETCH(addr,rw,locality) __builtin_prefetch(addr,rw,locality)\n"
<< "#else\n"
<< "#define LLVM_NAN(NanStr) ((double)0.0) /* Double */\n"
<< "#define LLVM_NANF(NanStr) 0.0F /* Float */\n"
@@ -814,6 +815,7 @@
<< "#define LLVM_NANSF(NanStr) 0.0F /* Float */\n"
<< "#define LLVM_INF ((double)0.0) /* Double */\n"
<< "#define LLVM_INFF 0.0F /* Float */\n"
+ << "#define LLVM_PREFETCH(addr,rw,locality) \n"
<< "#endif\n";
}
@@ -1430,6 +1432,7 @@
case Intrinsic::frameaddress:
case Intrinsic::setjmp:
case Intrinsic::longjmp:
+ case Intrinsic::prefetch:
// We directly implement these intrinsics
break;
default:
@@ -1504,6 +1507,16 @@
writeOperand(I.getOperand(2));
Out << ')';
return;
+ case Intrinsic::prefetch:
+ // This is only supported on GCC for now...
+ Out << "LLVM_PREFETCH((const void *)";
+ writeOperand(I.getOperand(1));
+ Out << ", ";
+ writeOperand(I.getOperand(2));
+ Out << ", ";
+ writeOperand(I.getOperand(3));
+ Out << ")";
+ return;
}
}