Undo r289072, which reverted upstream llvm trunk r240144. This is going

to be fixed for real by importing upstream llvm trunk r257902.

2 files changed, 4 insertions, 52 deletions

diff --git a/contrib/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/contrib/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
index 27d3337..f69a4e5 100644
--- a/contrib/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
+++ b/contrib/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
@@ -1691,8 +1691,10 @@ bool BoUpSLP::isFullyVectorizableTinyTree() {
   if (VectorizableTree.size() != 2)
     return false;
 
-  // Handle splat stores.
-  if (!VectorizableTree[0].NeedToGather && isSplat(VectorizableTree[1].Scalars))
+  // Handle splat and all-constants stores.
+  if (!VectorizableTree[0].NeedToGather &&
+      (allConstant(VectorizableTree[1].Scalars) ||
+       isSplat(VectorizableTree[1].Scalars)))
     return true;
 
   // Gathering cost would be too much for tiny trees.
diff --git a/contrib/llvm/patches/patch-07-undo-llvm-r240144-iostream-sigbus.diff b/contrib/llvm/patches/patch-07-undo-llvm-r240144-iostream-sigbus.diff
deleted file mode 100644
index da3e6b0..0000000
--- a/contrib/llvm/patches/patch-07-undo-llvm-r240144-iostream-sigbus.diff
+++ /dev/null
@@ -1,50 +0,0 @@
-Temporarily revert upstream llvm trunk r240144 (by Michael Zolotukhin):
-
-  [SLP] Vectorize for all-constant entries.
-
-This should fix libc++'s iostream initialization SIGBUSing whenever the
-global cout symbol is not aligned to 16 bytes.
-
-Introduced here: http://svnweb.freebsd.org/changeset/base/289072
-
-Index: lib/Transforms/Vectorize/SLPVectorizer.cpp
-===================================================================
---- lib/Transforms/Vectorize/SLPVectorizer.cpp
-+++ lib/Transforms/Vectorize/SLPVectorizer.cpp
-@@ -1642,10 +1642,8 @@ bool BoUpSLP::isFullyVectorizableTinyTree() {
-   if (VectorizableTree.size() != 2)
-     return false;
- 
--  // Handle splat and all-constants stores.
--  if (!VectorizableTree[0].NeedToGather &&
--      (allConstant(VectorizableTree[1].Scalars) ||
--       isSplat(VectorizableTree[1].Scalars)))
-+  // Handle splat stores.
-+  if (!VectorizableTree[0].NeedToGather && isSplat(VectorizableTree[1].Scalars))
-     return true;
- 
-   // Gathering cost would be too much for tiny trees.
-Index: test/Transforms/SLPVectorizer/X86/tiny-tree.ll
-===================================================================
---- test/Transforms/SLPVectorizer/X86/tiny-tree.ll
-+++ test/Transforms/SLPVectorizer/X86/tiny-tree.ll
-@@ -153,19 +153,3 @@ define void @store_splat(float*, float) {
-   store float %1, float* %6, align 4
-   ret void
- }
--
--
--; CHECK-LABEL: store_const
--; CHECK: store <4 x i32>
--define void @store_const(i32* %a) {
--entry:
--  %ptr0 = getelementptr inbounds i32, i32* %a, i64 0
--  store i32 10, i32* %ptr0, align 4
--  %ptr1 = getelementptr inbounds i32, i32* %a, i64 1
--  store i32 30, i32* %ptr1, align 4
--  %ptr2 = getelementptr inbounds i32, i32* %a, i64 2
--  store i32 20, i32* %ptr2, align 4
--  %ptr3 = getelementptr inbounds i32, i32* %a, i64 3
--  store i32 40, i32* %ptr3, align 4
--  ret void
--}