From 5f7c12cfbde275cd87c2ba33aa17d6ff6f5de436 Mon Sep 17 00:00:00 2001
From: Nadav Rotem <nrotem@apple.com>
Date: Mon, 24 Dec 2012 09:14:18 +0000
Subject: [PATCH] LoopVectorizer: When checking for vectorizable types, also
 check the StoreInst operands.

PR14705.

llvm-svn: 171023
---
 .../Transforms/Vectorize/LoopVectorize.cpp    |  9 +++++-
 .../LoopVectorize/X86/struct-store.ll         | 29 +++++++++++++++++++
 2 files changed, 37 insertions(+), 1 deletion(-)
 create mode 100644 llvm/test/Transforms/LoopVectorize/X86/struct-store.ll

diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
index 20bcf8681b8d..d571903984c4 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -1464,13 +1464,20 @@ bool LoopVectorizationLegality::canVectorizeInstrs() {
         return false;
       }
 
-      // We do not re-vectorize vectors.
+      // Check that the instruction return type is vectorizable.
       if (!VectorType::isValidElementType(it->getType()) &&
           !it->getType()->isVoidTy()) {
         DEBUG(dbgs() << "LV: Found unvectorizable type." << "\n");
         return false;
       }
 
+      // Check that the stored type is vectorizable.
+      if (StoreInst *ST = dyn_cast<StoreInst>(it)) {
+        Type *T = ST->getValueOperand()->getType();
+        if (!VectorType::isValidElementType(T))
+          return false;
+      }
+
       // Reduction instructions are allowed to have exit users.
       // All other instructions must not have external users.
       if (!AllowedExit.count(it))
diff --git a/llvm/test/Transforms/LoopVectorize/X86/struct-store.ll b/llvm/test/Transforms/LoopVectorize/X86/struct-store.ll
new file mode 100644
index 000000000000..86ea9efd314d
--- /dev/null
+++ b/llvm/test/Transforms/LoopVectorize/X86/struct-store.ll
@@ -0,0 +1,29 @@
+; RUN: opt < %s  -loop-vectorize -mtriple=x86_64-unknown-linux-gnu -S
+
+; Makre sure we are not crashing on this one.
+
+target datalayout =
+"e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+@glbl = external global [16 x { i64, i64 }], align 16
+
+declare void @fn()
+
+define void @test() {
+entry:
+  br label %loop
+
+loop:
+  %indvars.iv = phi i64 [ %indvars.iv.next, %loop ], [ 0, %entry ]
+  %tmp = getelementptr inbounds [16 x { i64, i64 }]* @glbl, i64 0, i64
+%indvars.iv
+  store { i64, i64 } { i64 ptrtoint (void ()* @fn to i64), i64 0 }, { i64, i64 }* %tmp, align 16
+  %indvars.iv.next = add i64 %indvars.iv, 1
+  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
+  %exitcond = icmp ne i32 %lftr.wideiv, 16
+  br i1 %exitcond, label %loop, label %exit
+
+exit:
+  ret void
+}