[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 85912695ab5cbfe03a92a809a041aaab23561173..87f73ff24c4d8d5b7cddd64d739da2eb60770044 100644 (file)
--- 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);
   }