From d993b016d170e441de08153dfc349dbaafe44826 Mon Sep 17 00:00:00 2001
From: Daniel Sanders <daniel_l_sanders@apple.com>
Date: Thu, 30 Nov 2017 18:48:35 +0000
Subject: [globalisel][tablegen] Add support for specific immediates in the
 match pattern

This enables a few rules such as ARM's uxtb instruction.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@319457 91177308-0d34-0410-b5e6-96231b3b80d8
---
 utils/TableGen/GlobalISelEmitter.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'utils')

diff --git a/utils/TableGen/GlobalISelEmitter.cpp b/utils/TableGen/GlobalISelEmitter.cpp
index f82b2fd3e9b..d9048c231c2 100644
--- a/utils/TableGen/GlobalISelEmitter.cpp
+++ b/utils/TableGen/GlobalISelEmitter.cpp
@@ -2812,6 +2812,14 @@ Expected<action_iterator> GlobalISelEmitter::importExplicitUseRenderer(
     return failedImport("Dst pattern child isn't a leaf node or an MBB" + llvm::to_string(*DstChild));
   }
 
+  // It could be a specific immediate in which case we should just check for
+  // that immediate.
+  if (const IntInit *ChildIntInit =
+          dyn_cast<IntInit>(DstChild->getLeafValue())) {
+    DstMIBuilder.addRenderer<ImmRenderer>(ChildIntInit->getValue());
+    return InsertPt;
+  }
+
   // Otherwise, we're looking for a bog-standard RegisterClass operand.
   if (auto *ChildDefInit = dyn_cast<DefInit>(DstChild->getLeafValue())) {
     auto *ChildRec = ChildDefInit->getDef();
-- 
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