[x86] invpcid LLVM intrinsic

Re-add the feature flag for invpcid, which was removed in r294561.
Add an intrinsic, which always uses a 32 bit integer as first argument,
while the instruction actually uses a 64 bit register in 64 bit mode
for the INVPCID_TYPE argument.

Reviewers: craig.topper

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D47141

llvm-svn: 333255

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/lib/Target/X86/X86Subtarget.h b/llvm/lib/Target/X86/X86Subtarget.h
index ea42e9a65f6..a9a06b0954e 100644
--- a/llvm/lib/Target/X86/X86Subtarget.h
+++ b/llvm/lib/Target/X86/X86Subtarget.h
@@ -360,6 +360,9 @@ protected:
   /// using Shadow Stack
   bool HasSHSTK;
 
+  /// Processor supports Invalidate Process-Context Identifier
+  bool HasINVPCID;
+
   /// Processor has Software Guard Extensions
   bool HasSGX;
 
@@ -644,6 +647,7 @@ public:
   bool hasWAITPKG() const { return HasWAITPKG; }
   bool hasPCONFIG() const { return HasPCONFIG; }
   bool hasSGX() const { return HasSGX; }
+  bool hasINVPCID() const { return HasINVPCID; }
   bool useRetpoline() const { return UseRetpoline; }
   bool useRetpolineExternalThunk() const { return UseRetpolineExternalThunk; }