6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-25 16:31:33 +00:00
Code Issues Projects Releases Wiki Activity

Add a comment explaining why this code is more complex than it

Browse Source 
initially seems it should require.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111913 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2010-08-24 14:31:06 +00:00
parent 55aebef654
commit 41d6ab4b88
1 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
lib/AsmParser/LLParser.h
View File

@ -80,6 +80,14 @@ namespace llvm {
// Instruction metadata resolution. Each instruction can have a list of
// MDRef info associated with them.
//
// The simpler approach of just creating temporary MDNodes and then calling
// RAUW on them when the definition is processed doesn't work because some
// instruction metadata kinds, such as dbg, get stored in the IR in an
// "optimized" format which doesn't participate in the normal value use
// lists. This means that RAUW doesn't work, even on temporary MDNodes
// which otherwise support RAUW. Instead, we defer resolving MDNode
// references until the definitions have been processed.
struct MDRef {
SMLoc Loc;
unsigned MDKind, MDSlot;