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author | Diego Novillo <dnovillo@google.com> | 2014-03-03 20:06:11 +0000 |
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committer | Diego Novillo <dnovillo@google.com> | 2014-03-03 20:06:11 +0000 |
commit | f05b45fdb2d04db7bc1cde4529ebe0afdb9be148 (patch) | |
tree | 9a61f45d821e89428889bb03b6ee7852984daf66 /lib/Transforms/Utils/Utils.cpp | |
parent | 9efaf2f2dad82d5455970af0370edace405791b2 (diff) | |
download | llvm-f05b45fdb2d04db7bc1cde4529ebe0afdb9be148.tar.gz llvm-f05b45fdb2d04db7bc1cde4529ebe0afdb9be148.tar.bz2 llvm-f05b45fdb2d04db7bc1cde4529ebe0afdb9be148.tar.xz |
Pass to emit DWARF path discriminators.
DWARF discriminators are used to distinguish multiple control flow paths
on the same source location. When this happens, instructions across
basic block boundaries will share the same debug location.
This pass detects this situation and creates a new lexical scope to one
of the two instructions. This lexical scope is a child scope of the
original and contains a new discriminator value. This discriminator is
then picked up from MCObjectStreamer::EmitDwarfLocDirective to be
written on the object file.
This fixes http://llvm.org/bugs/show_bug.cgi?id=18270.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202752 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Utils/Utils.cpp')
-rw-r--r-- | lib/Transforms/Utils/Utils.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/Transforms/Utils/Utils.cpp b/lib/Transforms/Utils/Utils.cpp index 3fb5463404..ed4f45c6a6 100644 --- a/lib/Transforms/Utils/Utils.cpp +++ b/lib/Transforms/Utils/Utils.cpp @@ -21,6 +21,7 @@ using namespace llvm; /// initializeTransformUtils - Initialize all passes in the TransformUtils /// library. void llvm::initializeTransformUtils(PassRegistry &Registry) { + initializeAddDiscriminatorsPass(Registry); initializeBreakCriticalEdgesPass(Registry); initializeInstNamerPass(Registry); initializeLCSSAPass(Registry); |