From: Johnny Chen <johnny.chen@apple.com>
Date: Thu, 24 Mar 2011 23:21:14 +0000 (+0000)
Subject: The ARM disassembler was confused with the 16-bit tSTMIA instruction.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=1090d7711b145da53089f63336b173941d48d6f2;p=oota-llvm.git

The ARM disassembler was confused with the 16-bit tSTMIA instruction.
According to A8.6.189 STM/STMIA/STMEA (Encoding T1), there's only tSTMIA_UPD available.
Ignore tSTMIA for the decoder emitter and add a test case for that.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128246 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/test/MC/Disassembler/ARM/thumb-tests.txt b/test/MC/Disassembler/ARM/thumb-tests.txt
index 6a010644e1b..895769c3dea 100644
--- a/test/MC/Disassembler/ARM/thumb-tests.txt
+++ b/test/MC/Disassembler/ARM/thumb-tests.txt
@@ -139,3 +139,6 @@
 
 # CHECK:	stmdb.w	sp, {r0, r2, r3, r8, r11, lr}
 0x0d 0xe9 0x0d 0x49
+
+# CHECK:	stmia	r5!, {r0, r1, r2, r3, r4}
+0x1f 0xc5
diff --git a/utils/TableGen/ARMDecoderEmitter.cpp b/utils/TableGen/ARMDecoderEmitter.cpp
index b174fa961ad..728e6698159 100644
--- a/utils/TableGen/ARMDecoderEmitter.cpp
+++ b/utils/TableGen/ARMDecoderEmitter.cpp
@@ -1615,6 +1615,11 @@ ARMDEBackend::populateInstruction(const CodeGenInstruction &CGI,
     if (!thumbInstruction(Form))
       return false;
 
+    // A8.6.189 STM / STMIA / STMEA -- Encoding T1
+    // There's only STMIA_UPD for Thumb1.
+    if (Name == "tSTMIA")
+      return false;
+
     // On Darwin R9 is call-clobbered.  Ignore the non-Darwin counterparts.
     if (Name == "tBL" || Name == "tBLXi" || Name == "tBLXr")
       return false;