From: Bob Wilson <bob.wilson@apple.com>
Date: Fri, 10 Dec 2010 19:45:06 +0000 (+0000)
Subject: Do not assert on shifts of Neon polynomial types.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=42499f94069c73d7a9c82da98a4245ea9fe2c526;p=clang

Do not assert on shifts of Neon polynomial types.
Most Neon shift intrinsics do not have variants for polynomial types, but
vsri_n and vsli_n do support them, and we need to properly range-check the
shift immediates for them.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@121509 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Sema/SemaChecking.cpp b/lib/Sema/SemaChecking.cpp
index f53086e33c..b699f5a318 100644
--- a/lib/Sema/SemaChecking.cpp
+++ b/lib/Sema/SemaChecking.cpp
@@ -198,11 +198,9 @@ static unsigned RFT(unsigned t, bool shift = false) {
       assert(!shift && "cannot shift float types!");
       return (2 << (int)quad) - 1;
     case 5: // poly8
-      assert(!shift && "cannot shift polynomial types!");
-      return (8 << (int)quad) - 1;
+      return shift ? 7 : (8 << (int)quad) - 1;
     case 6: // poly16
-      assert(!shift && "cannot shift polynomial types!");
-      return (4 << (int)quad) - 1;
+      return shift ? 15 : (4 << (int)quad) - 1;
     case 7: // float16
       assert(!shift && "cannot shift float types!");
       return (4 << (int)quad) - 1;