[LV] Stop saying "use -Rpass-analysis=loop-vectorize"

This is PR28376.

Unfortunately given the current structure of optimization diagnostics we
lack the capability to tell whether the user has
passed -Rpass-analysis=loop-vectorize since this is local to the
front-end (BackendConsumer::OptimizationRemarkHandler).

So rather than printing this even if the user has already
passed -Rpass-analysis, this patch just punts and stops recommending
this option.  I don't think that getting this right is worth the
complexity.

Differential Revision: https://reviews.llvm.org/D26563

llvm-svn: 286662

1 files changed, 1 insertions, 2 deletions

diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
index 2c43a5679e4..abbe416179c 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -1319,8 +1319,7 @@ public:
     else {
       OptimizationRemarkMissed R(LV_NAME, "MissedDetails",
                                  TheLoop->getStartLoc(), TheLoop->getHeader());
-      R << "loop not vectorized: use -Rpass-analysis=loop-vectorize for more "
-           "info";
+      R << "loop not vectorized";
       if (Force.Value == LoopVectorizeHints::FK_Enabled) {
         R << " (Force=" << NV("Force", true);
         if (Width.Value != 0)