commit f771f79b2fbd1e1dc47b7308f0db2c2f8b4bd56f
author Craig Topper <craig.topper@gmail.com> Fri Mar 31 17:22:30 2017 +0000
committer Craig Topper <craig.topper@gmail.com> Fri Mar 31 17:22:30 2017 +0000
tree 402f69c669968fe7d25936eaf8a01fdff517a4cb
parent d41a0c1509d16ecb9ad66b0351f0ed4d9ecb4b91

[Sema][X86] Update immediate check for gather/scatter prefetch instructions to match the _MM_HINT_T0/T1 constant definitions

Our _MM_HINT_T0/T1 constant values are 3/2 which matches gcc, but not icc or Intel documentation. Interestingly gcc had this same bug on their implementation of the gather/scatter builtins at one point too.

Fixes PR32411.

llvm-svn: 299233

clang/lib/Sema/SemaChecking.cpp

diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp
index 813a742..81db0d3 100644
--- a/clang/lib/Sema/SemaChecking.cpp
+++ b/clang/lib/Sema/SemaChecking.cpp
@@ -2308,7 +2308,7 @@
   case X86::BI__builtin_ia32_scatterpfdps:
   case X86::BI__builtin_ia32_scatterpfqpd:
   case X86::BI__builtin_ia32_scatterpfqps:
-    i = 4; l = 1; u = 2;
+    i = 4; l = 2; u = 3;
     break;
   case X86::BI__builtin_ia32_pcmpestrm128:
   case X86::BI__builtin_ia32_pcmpestri128: