V4 JIT: add some documentation and literature references.

Change-Id: I67667b74672b94b951361bf2a446476edf44b826
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/qml/jit/qv4regalloc.cpp b/src/qml/jit/qv4regalloc.cpp
index 2a3a1cd1bc..cb24db36b9 100644
--- a/src/qml/jit/qv4regalloc.cpp
+++ b/src/qml/jit/qv4regalloc.cpp
@@ -1272,6 +1272,8 @@ LifeTimeInterval *RegisterAllocator::cloneFixedInterval(int reg, bool isFP, cons
     return lti;
 }
 
+// Creates the intervals with fixed ranges. See [Wimmer2]. Note that this only applies to callee-
+// saved registers.
 void RegisterAllocator::prepareRanges()
 {
     LifeTimeInterval ltiWithCalls = createFixedInterval(_info->calls().size());
@@ -1779,3 +1781,13 @@ void RegisterAllocator::dump(IR::Function *function) const
 
     printer.print(function);
 }
+
+// References:
+//  [Wimmer1] C. Wimmer and M. Franz. Linear Scan Register Allocation on SSA Form. In Proceedings of
+//            CGO’10, ACM Press, 2010
+//  [Wimmer2] C. Wimmer and H. Mossenbock. Optimized Interval Splitting in a Linear Scan Register
+//            Allocator. In Proceedings of the ACM/USENIX International Conference on Virtual
+//            Execution Environments, pages 132–141. ACM Press, 2005.
+//  [Traub]   Omri Traub, Glenn Holloway, and Michael D. Smith. Quality and Speed in Linear-scan
+//            Register Allocation. In Proceedings of the ACM SIGPLAN 1998 Conference on Programming
+//            Language Design and Implementation, pages 142–151, June 1998.