Add stack protector support to clang. This generates the 'ssp' and 'sspreq'
function attributes. There are predefined macros that are defined when stack
protectors are used: __SSP__=1 with -fstack-protector and __SSP_ALL__=2 with
-fstack-protector-all.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@74405 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/ArgList.cpp b/lib/Driver/ArgList.cpp
index 593694c..54dd4bb 100644
--- a/lib/Driver/ArgList.cpp
+++ b/lib/Driver/ArgList.cpp
@@ -49,6 +49,35 @@
return Res;
}
+Arg *ArgList::getLastArg(options::ID Id0, options::ID Id1, options::ID Id2,
+ bool Claim) const {
+ Arg *Res = 0;
+ Arg *A0 = getLastArg(Id0, false);
+ Arg *A1 = getLastArg(Id1, false);
+ Arg *A2 = getLastArg(Id2, false);
+
+ int A0Idx = A0 ? A0->getIndex() : -1;
+ int A1Idx = A1 ? A1->getIndex() : -1;
+ int A2Idx = A2 ? A2->getIndex() : -1;
+
+ if (A0Idx > A1Idx) {
+ if (A0Idx > A2Idx)
+ Res = A0;
+ else if (A2Idx != -1)
+ Res = A2;
+ } else {
+ if (A1Idx > A2Idx)
+ Res = A1;
+ else if (A2Idx != -1)
+ Res = A2;
+ }
+
+ if (Claim && Res)
+ Res->claim();
+
+ return Res;
+}
+
bool ArgList::hasFlag(options::ID Pos, options::ID Neg, bool Default) const {
if (Arg *A = getLastArg(Pos, Neg))
return A->getOption().matches(Pos);