From e1b43c3b4000ee7201fcac8d1c8e75bb9fb547e3 Mon Sep 17 00:00:00 2001 From: Jakob Stoklund Olesen Date: Tue, 12 Apr 2011 18:11:31 +0000 Subject: [PATCH] Add SplitKit API to query and select the current interval being worked on. This makes it possible to target multiple registers in one pass. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129374 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SplitKit.cpp | 9 ++++++++- lib/CodeGen/SplitKit.h | 10 +++++++++- 2 files changed, 17 insertions(+), 2 deletions(-) diff --git a/lib/CodeGen/SplitKit.cpp b/lib/CodeGen/SplitKit.cpp index 6195ab0f206..f85d5d358ab 100644 --- a/lib/CodeGen/SplitKit.cpp +++ b/lib/CodeGen/SplitKit.cpp @@ -557,7 +557,7 @@ VNInfo *SplitEditor::defFromParent(unsigned RegIdx, } /// Create a new virtual register and live interval. -void SplitEditor::openIntv() { +unsigned SplitEditor::openIntv() { assert(!OpenIdx && "Previous LI not closed before openIntv"); // Create the complement as index 0. @@ -567,6 +567,13 @@ void SplitEditor::openIntv() { // Create the open interval. OpenIdx = Edit->size(); Edit->create(LIS, VRM); + return OpenIdx; +} + +void SplitEditor::selectIntv(unsigned Idx) { + assert(Idx != 0 && "Cannot select the complement interval"); + assert(Idx < Edit->size() && "Can only select previously opened interval"); + OpenIdx = Idx; } SlotIndex SplitEditor::enterIntvBefore(SlotIndex Idx) { diff --git a/lib/CodeGen/SplitKit.h b/lib/CodeGen/SplitKit.h index f1ff501fbdd..fab56f70d9b 100644 --- a/lib/CodeGen/SplitKit.h +++ b/lib/CodeGen/SplitKit.h @@ -283,7 +283,15 @@ public: void reset(LiveRangeEdit&); /// Create a new virtual register and live interval. - void openIntv(); + /// Return the interval index, starting from 1. Interval index 0 is the + /// implicit complement interval. + unsigned openIntv(); + + /// currentIntv - Return the current interval index. + unsigned currentIntv() const { return OpenIdx; } + + /// selectIntv - Select a previously opened interval index. + void selectIntv(unsigned Idx); /// enterIntvBefore - Enter the open interval before the instruction at Idx. /// If the parent interval is not live before Idx, a COPY is not inserted. -- 2.11.0