A couple more vector component access fixes.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@62443 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp
index 6540b2c..4dd06b9 100644
--- a/lib/AST/Expr.cpp
+++ b/lib/AST/Expr.cpp
@@ -1160,6 +1160,17 @@
bool ExtVectorElementExpr::containsDuplicateElements() const {
const char *compStr = Accessor.getName();
unsigned length = Accessor.getLength();
+
+ // Halving swizzles do not contain duplicate elements.
+ if (!strcmp(compStr, "hi") || !strcmp(compStr, "lo") ||
+ !strcmp(compStr, "even") || !strcmp(compStr, "odd"))
+ return false;
+
+ // Advance past s-char prefix on hex swizzles.
+ if (*compStr == 's') {
+ compStr++;
+ length--;
+ }
for (unsigned i = 0; i != length-1; i++) {
const char *s = compStr+i;