http://llvm.org/bugs/show_bug.cgi?id=21433
Bug ID: 21433
Summary: Debug info IR: MDLocation
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Core LLVM classes
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
`MDLocation` is a first-class IR type that has two other representations:
`DILocation` (which now trivially wraps `MDLocation` instead of `MDNode`) and
`DebugLoc`. More details in the LLVMdev post [1].
[1]: http://lists.cs.uiuc.edu/pipermail/llvmdev/2014-October/078173.html
Aside from adding `MDLocation` itself, this PR includes adding general IR
support for non-MDNode metadata. In particular, a number of APIs expect only
`MDNode` instances. This affects metadata APIs such as
`Instruction::getMetadata()` and `NamedMDNode::getOperand()`, which need to use
`Value` instead of `MDNode`.
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