[IR] Make getParamAttributes take argument numbers, not ArgNo+1

Add hasParamAttribute() and use it instead of hasAttribute(ArgNo+1,
Kind) everywhere.

The fact that the AttributeList index for an argument is ArgNo+1 should
be a hidden implementation detail.

NFC

llvm-svn: 300272

1 files changed, 7 insertions, 2 deletions

diff --git a/llvm/lib/IR/Attributes.cpp b/llvm/lib/IR/Attributes.cpp
index 2e3d7bdf709..2b7359dab80 100644
--- a/llvm/lib/IR/Attributes.cpp
+++ b/llvm/lib/IR/Attributes.cpp
@@ -1170,8 +1170,8 @@ AttributeList::addAllocSizeAttr(LLVMContext &C, unsigned Index,
 
 LLVMContext &AttributeList::getContext() const { return pImpl->getContext(); }
 
-AttributeSet AttributeList::getParamAttributes(unsigned Index) const {
-  return getAttributes(Index);
+AttributeSet AttributeList::getParamAttributes(unsigned ArgNo) const {
+  return getAttributes(ArgNo + 1);
 }
 
 AttributeSet AttributeList::getRetAttributes() const {
@@ -1203,6 +1203,11 @@ bool AttributeList::hasFnAttribute(StringRef Kind) const {
   return hasAttribute(AttributeList::FunctionIndex, Kind);
 }
 
+bool AttributeList::hasParamAttribute(unsigned ArgNo,
+                                      Attribute::AttrKind Kind) const {
+  return hasAttribute(ArgNo + 1, Kind);
+}
+
 bool AttributeList::hasAttrSomewhere(Attribute::AttrKind Attr,
                                      unsigned *Index) const {
   if (!pImpl) return false;