Support clrex instruction on ARMv6k. Patch by Andrew Turner.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256505 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMInstrInfo.td b/lib/Target/ARM/ARMInstrInfo.td
index 2aa9475e6f475eb332ae8dae07ddd66c16352971..b9de83bfe6dc871074df1184676cbc0e4a571ec1 100644 (file)
--- a/lib/Target/ARM/ARMInstrInfo.td
+++ b/lib/Target/ARM/ARMInstrInfo.td
@@ -4728,7 +4728,7 @@ def STLEXD : AIstlex<0b01, (outs GPR:$Rd),
 
 def CLREX : AXI<(outs), (ins), MiscFrm, NoItinerary, "clrex",
                 [(int_arm_clrex)]>,
-            Requires<[IsARM, HasV7]>  {
+            Requires<[IsARM, HasV6K]>  {
   let Inst{31-0} = 0b11110101011111111111000000011111;
 }
 

diff --git a/test/MC/ARM/arm11-hint-instr.s b/test/MC/ARM/arm11-hint-instr.s
index 6f5a374e417c209887ab050359a74483cf7c61ad..2c0fef4adf73b4b5b9d0a2da4ec8871f112d3ee5 100644 (file)
--- a/test/MC/ARM/arm11-hint-instr.s
+++ b/test/MC/ARM/arm11-hint-instr.s
@@ -5,21 +5,24 @@
 @ RUN:     | FileCheck --check-prefix=CHECK-ARM %s
 @ RUN: llvm-mc -triple=armv6t2 -show-encoding < %s \
 @ RUN:     | FileCheck --check-prefix=CHECK-ARM %s
-@ RUN: llvm-mc -triple=thumb -mcpu=arm1156t2-s -show-encoding < %s \
-@ RUN:     | FileCheck --check-prefix=CHECK-THUMB %s
-@ RUN: llvm-mc -triple=armv6m -show-encoding < %s \
-@ RUN:     | FileCheck --check-prefix=CHECK-V6M %s
+@ RUN: not llvm-mc -triple=thumb -mcpu=arm1156t2-s -show-encoding < %s > %t3 2> %t4
+@ RUN: FileCheck --check-prefix=CHECK-THUMB %s < %t3
+@ RUN: FileCheck --check-prefix=CHECK-ERROR-THUMB %s < %t4
+@ RUN: not llvm-mc -triple=armv6m -show-encoding < %s > %t5 2> %t6
+@ RUN: FileCheck --check-prefix=CHECK-V6M %s < %t5
+@ RUN: FileCheck --check-prefix=CHECK-ERROR-V6M %s < %t6
 
   .syntax unified
 
 @------------------------------------------------------------------------------
-@ YIELD/WFE/WFI/SEV - are not supported pre v6K
+@ YIELD/WFE/WFI/SEV/CLREX - are not supported pre v6K
 @------------------------------------------------------------------------------
         nop
         yield
         wfe
         wfi
         sev
+        clrex
 
 
 @------------------------------------------------------------------------------
@@ -37,6 +40,9 @@
 @ CHECK-ERROR-V6: error: instruction requires: armv6k
 @ CHECK-ERROR-V6: sev
 @ CHECK-ERROR-V6: ^
+@ CHECK-ERROR-V6: error: instruction requires: armv6k
+@ CHECK-ERROR-V6: clrex
+@ CHECK-ERROR-V6: ^
 
 @------------------------------------------------------------------------------
 @ v6K using ARM encoding
@@ -49,6 +55,7 @@
 @ CHECK-ARM: wfe                             @ encoding: [0x02,0xf0,0x20,0xe3]
 @ CHECK-ARM: wfi                             @ encoding: [0x03,0xf0,0x20,0xe3]
 @ CHECK-ARM: sev                             @ encoding: [0x04,0xf0,0x20,0xe3]
+@ CHECK-ARM: clrex                           @ encoding: [0x1f,0xf0,0x7f,0xf5]
 
 @------------------------------------------------------------------------------
 @ v6T2 using THUMB encoding (thumb triple)
@@ -58,6 +65,9 @@
 @ CHECK-THUMB: wfe                             @ encoding: [0x20,0xbf]
 @ CHECK-THUMB: wfi                             @ encoding: [0x30,0xbf]
 @ CHECK-THUMB: sev                             @ encoding: [0x40,0xbf]
+@ CHECK-ERROR-THUMB: error: instruction requires: armv7
+@ CHECK-ERROR-THUMB: clrex
+@ CHECK-ERROR-THUMB: ^
 
 @------------------------------------------------------------------------------
 @ v6M using THUMB encoding
@@ -67,3 +77,6 @@
 @ CHECK-V6M: wfe                             @ encoding: [0x20,0xbf]
 @ CHECK-V6M: wfi                             @ encoding: [0x30,0xbf]
 @ CHECK-V6M: sev                             @ encoding: [0x40,0xbf]
+@ CHECK-ERROR-V6M: error: instruction requires: armv7
+@ CHECK-ERROR-V6M: clrex
+@ CHECK-ERROR-V6M: ^