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Add a 'count' field to the DWARF subrange.

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The count field is necessary because there isn't a difference between the 'lo'
and 'hi' attributes for a one-element array and a zero-element array. When the
count is '0', we know that this is a zero-element array. When it's >=1, then
it's a normal constant sized array. When it's -1, then the array is unbounded.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169218 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling
2012-12-04 06:20:49 +00:00
parent 319d594e22
commit a7645a3c66
19 changed files with 158 additions and 18 deletions
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6
lib/VMCore/DIBuilder.cpp
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@@ -741,11 +741,13 @@ DIArray DIBuilder::getOrCreateArray(ArrayRef<Value *> Elements) {
/// getOrCreateSubrange - Create a descriptor for a value range. This
/// implicitly uniques the values returned.
DISubrange DIBuilder::getOrCreateSubrange(int64_t Lo, int64_t Hi) {
DISubrange DIBuilder::getOrCreateSubrange(int64_t Lo, int64_t Hi,
int64_t Count) {
Value *Elts[] = {
GetTagConstant(VMContext, dwarf::DW_TAG_subrange_type),
ConstantInt::get(Type::getInt64Ty(VMContext), Lo),
ConstantInt::get(Type::getInt64Ty(VMContext), Hi)
ConstantInt::get(Type::getInt64Ty(VMContext), Hi),
ConstantInt::get(Type::getInt64Ty(VMContext), Count)
};
return DISubrange(MDNode::get(VMContext, Elts));