From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Tue, 14 May 2019 10:29:18 +0000 (+0000)
Subject: [MemorySanitizer] getMMXVectorTy - assert valid element size. NFCI.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=fc3be0e08d754f81abaf3ae5f48ed5d2209d42f5;p=llvm

[MemorySanitizer] getMMXVectorTy - assert valid element size. NFCI.

Fixes scan-build warnings

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@360658 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Instrumentation/MemorySanitizer.cpp b/lib/Transforms/Instrumentation/MemorySanitizer.cpp
index 85912695ab5..87f73ff24c4 100644
--- a/lib/Transforms/Instrumentation/MemorySanitizer.cpp
+++ b/lib/Transforms/Instrumentation/MemorySanitizer.cpp
@@ -2712,6 +2712,8 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
   // Get an X86_MMX-sized vector type.
   Type *getMMXVectorTy(unsigned EltSizeInBits) {
     const unsigned X86_MMXSizeInBits = 64;
+    assert(EltSizeInBits != 0 && (X86_MMXSizeInBits % EltSizeInBits) == 0 &&
+           "Illegal MMX vector element size");
     return VectorType::get(IntegerType::get(*MS.C, EltSizeInBits),
                            X86_MMXSizeInBits / EltSizeInBits);
   }