Rework the routines that convert AP[S]Int into a string. Now, instead of
returning an std::string by value, it fills in a SmallString/SmallVector
passed in. This significantly reduces string thrashing in some cases.
More specifically, this:
- Adds an operator<< and a print method for APInt that allows you to
directly send them to an ostream.
- Reimplements APInt::toString to be much simpler and more efficient
algorithmically in addition to not thrashing strings quite as much.
This speeds up llvm-dis on kc++ by 7%, and may also slightly speed up the
asmprinter. This also fixes a bug I introduced into the asmwriter in a
previous patch w.r.t. alias printing.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54873 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Utils/LowerSwitch.cpp b/lib/Transforms/Utils/LowerSwitch.cpp
index 630f97c..7409e77 100644
--- a/lib/Transforms/Utils/LowerSwitch.cpp
+++ b/lib/Transforms/Utils/LowerSwitch.cpp
@@ -144,11 +144,9 @@
DOUT << "RHS: " << RHS << "\n";
CaseRange& Pivot = *(Begin + Mid);
- DEBUG( DOUT << "Pivot ==> "
- << cast<ConstantInt>(Pivot.Low)->getValue().toStringSigned(10)
- << " -"
- << cast<ConstantInt>(Pivot.High)->getValue().toStringSigned(10)
- << "\n");
+ DEBUG(cerr << "Pivot ==> "
+ << cast<ConstantInt>(Pivot.Low)->getValue() << " -"
+ << cast<ConstantInt>(Pivot.High)->getValue() << "\n");
BasicBlock* LBranch = switchConvert(LHS.begin(), LHS.end(), Val,
OrigBlock, Default);