X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FWebAssembly%2FWebAssemblyISelLowering.cpp;fp=lib%2FTarget%2FWebAssembly%2FWebAssemblyISelLowering.cpp;h=ed7cb1909d9fd504d81f9c0ccee8c2b6e77e1cd9;hb=f2640be5dfc41d11ca28ad60ab5e45bf4db7e36e;hp=2364366f3f54457bf37bc0e25482f2bb96dedc9c;hpb=6b90fe4207bcd41cd7527fec66235c6c7c8cbc07;p=oota-llvm.git

diff --git a/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp b/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
index 2364366f3f5..ed7cb1909d9 100644
--- a/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
+++ b/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
@@ -207,6 +207,13 @@ MVT WebAssemblyTargetLowering::getScalarShiftAmountTy(const DataLayout & /*DL*/,
   unsigned BitWidth = NextPowerOf2(VT.getSizeInBits() - 1);
   if (BitWidth > 1 && BitWidth < 8)
     BitWidth = 8;
+
+  if (BitWidth > 64) {
+    BitWidth = 64;
+    assert(BitWidth >= Log2_32_Ceil(VT.getSizeInBits()) &&
+           "64-bit shift counts ought to be enough for anyone");
+  }
+
   MVT Result = MVT::getIntegerVT(BitWidth);
   assert(Result != MVT::INVALID_SIMPLE_VALUE_TYPE &&
          "Unable to represent scalar shift amount type");