From: Matt Arsenault <Matthew.Arsenault@amd.com>
Date: Fri, 22 Feb 2019 19:03:31 +0000 (+0000)
Subject: LiveIntervals: Add removeAllRegUnitsForPhysReg
X-Git-Tag: llvmorg-10-init~11385
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=45cfe9822d8d4401c7998351e54a159a19c09bad;p=platform%2Fupstream%2Fllvm.git

LiveIntervals: Add removeAllRegUnitsForPhysReg

Convenience wrapper for removing the reg units of
a physical register.

llvm-svn: 354685
---

diff --git a/llvm/include/llvm/CodeGen/LiveIntervals.h b/llvm/include/llvm/CodeGen/LiveIntervals.h
index d0791be..588b0f9 100644
--- a/llvm/include/llvm/CodeGen/LiveIntervals.h
+++ b/llvm/include/llvm/CodeGen/LiveIntervals.h
@@ -417,6 +417,15 @@ class VirtRegMap;
       RegUnitRanges[Unit] = nullptr;
     }
 
+    /// Remove associated live ranges for the register units associated with \p
+    /// Reg. Subsequent uses should rely on on-demand recomputation.  \note This
+    /// method can result in inconsistent liveness tracking if multiple phyical
+    /// registers share a regunit, and should be used cautiously.
+    void removeAllRegUnitsForPhysReg(unsigned Reg) {
+      for (MCRegUnitIterator Units(Reg, TRI); Units.isValid(); ++Units)
+        removeRegUnit(*Units);
+    }
+
     /// Remove value numbers and related live segments starting at position
     /// \p Pos that are part of any liverange of physical register \p Reg or one
     /// of its subregisters.