Clear the entering, exiting and internal ranges of a bundle before collecting

ranges for the instruction about to be bundled. This fixes a bug in an external
project where an assertion was triggered due to spurious 'multiple defs' within
the bundle.

Patch by Ivan Llopard. Thanks Ivan!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157632 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index 78a634adf0b7437f43b2549cc4dffa89bfd8283c..bb767a71ecf9096b7d8fa39ad66e0dee3c5c2443 100644 (file)
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -1097,6 +1097,9 @@ public:
 
     BundleRanges BR = createBundleRanges(Entering, Internal, Exiting);
 
+    Entering.clear();
+    Internal.clear();
+    Exiting.clear();
     collectRanges(MI, Entering, Internal, Exiting, hasRegMaskOp, OldIdx);
     assert(!hasRegMaskOp && "Can't have RegMask operand in bundle.");