[GVN] Basic optimization remark support

[recommiting patches one-by-one to see which breaks the stage2 LTO bot]

Follow-on patches will add more interesting cases.

The goal of this patch-set is to get the GVN messages printed in
opt-viewer from Dhrystone as was presented in my Dev Meeting talk.  This
is the optimization view for the function (the last remark in the
function has a bug which is fixed in this series):
http://lab.llvm.org:8080/artifacts/opt-view_test-suite/build/SingleSource/Benchmarks/Dhrystone/CMakeFiles/dry.dir/html/_org_test-suite_SingleSource_Benchmarks_Dhrystone_dry.c.html#L430

Differential Revision: https://reviews.llvm.org/D26488

llvm-svn: 288210

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/IR/DiagnosticInfo.cpp b/llvm/lib/IR/DiagnosticInfo.cpp
index 5618de8f602..6a3fdcff233 100644
--- a/llvm/lib/IR/DiagnosticInfo.cpp
+++ b/llvm/lib/IR/DiagnosticInfo.cpp
@@ -180,6 +180,12 @@ DiagnosticInfoOptimizationBase::Argument::Argument(StringRef Key, Value *V)
     DLoc = I->getDebugLoc();
 }
 
+DiagnosticInfoOptimizationBase::Argument::Argument(StringRef Key, Type *T)
+    : Key(Key) {
+  raw_string_ostream OS(Val);
+  OS << *T;
+}
+
 DiagnosticInfoOptimizationBase::Argument::Argument(StringRef Key, int N)
     : Key(Key), Val(itostr(N)) {}