Pass alignment on ByVal parameters, from FE, all

the way through.  It is now used for codegen.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47484 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 13 insertions, 0 deletions

diff --git a/include/llvm/ParameterAttributes.h b/include/llvm/ParameterAttributes.h
index c3a52fb..33cc95c 100644
--- a/include/llvm/ParameterAttributes.h
+++ b/include/llvm/ParameterAttributes.h
@@ -69,6 +69,12 @@ const Attributes MutuallyIncompatible[3] = {
 /// @brief Which attributes cannot be applied to a type.
 Attributes typeIncompatible (const Type *Ty);
 
+/// This turns an int alignment (a power of 2, normally) into the
+/// form used internally in ParameterAttributes.
+ParamAttr::Attributes inline constructAlignmentFromInt(uint32_t i) {
+  return (i << 16);
+}
+
 } // end namespace ParamAttr
 
 /// @brief A more friendly way to reference the attributes.
@@ -176,6 +182,13 @@ class ParamAttrsList : public FoldingSetNode {
     bool paramHasAttr(uint16_t i, ParameterAttributes attr) const {
       return getParamAttrs(i) & attr;
     }
+  
+    /// This extracts the alignment for the \p ith function parameter.
+    /// @returns 0 if unknown, else the alignment in bytes
+    /// @brief Extract the Alignment
+    uint16_t getParamAlignment(uint16_t i) const {
+      return (getParamAttrs(i) & ParamAttr::Alignment) >> 16;
+    }
 
     /// This returns whether the given attribute is set for at least one
     /// parameter or for the return value.