[llvm] r251280 - [ARM] Handle the inline asm constraint type 'o'

[James Molloy via llvm-commits]

Author: jamesm
Date: Mon Oct 26 05:04:52 2015
New Revision: 251280

URL: http://llvm.org/viewvc/llvm-project?rev=251280&view=rev
Log:
[ARM] Handle the inline asm constraint type 'o'

This means "memory with offset" and requires very little plumbing to get working. This fixes PR25317.

Added:
    llvm/trunk/test/CodeGen/ARM/pr25317.ll
Modified:
    llvm/trunk/lib/Target/ARM/ARMISelDAGToDAG.cpp
    llvm/trunk/lib/Target/ARM/ARMISelLowering.h

Modified: llvm/trunk/lib/Target/ARM/ARMISelDAGToDAG.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMISelDAGToDAG.cpp?rev=251280&r1=251279&r2=251280&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMISelDAGToDAG.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMISelDAGToDAG.cpp Mon Oct 26 05:04:52 2015
@@ -3924,6 +3924,7 @@ SelectInlineAsmMemoryOperand(const SDVal
     //        be an immediate and not a memory constraint.
     // Fallthrough.
   case InlineAsm::Constraint_m:
+  case InlineAsm::Constraint_o:
   case InlineAsm::Constraint_Q:
   case InlineAsm::Constraint_Um:
   case InlineAsm::Constraint_Un:

Modified: llvm/trunk/lib/Target/ARM/ARMISelLowering.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMISelLowering.h?rev=251280&r1=251279&r2=251280&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMISelLowering.h (original)
+++ llvm/trunk/lib/Target/ARM/ARMISelLowering.h Mon Oct 26 05:04:52 2015
@@ -348,6 +348,8 @@ namespace llvm {
     getInlineAsmMemConstraint(StringRef ConstraintCode) const override {
       if (ConstraintCode == "Q")
         return InlineAsm::Constraint_Q;
+      else if (ConstraintCode == "o")
+        return InlineAsm::Constraint_o;
       else if (ConstraintCode.size() == 2) {
         if (ConstraintCode[0] == 'U') {
           switch(ConstraintCode[1]) {

Added: llvm/trunk/test/CodeGen/ARM/pr25317.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/ARM/pr25317.ll?rev=251280&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/ARM/pr25317.ll (added)
+++ llvm/trunk/test/CodeGen/ARM/pr25317.ll Mon Oct 26 05:04:52 2015
@@ -0,0 +1,11 @@
+; RUN: llc < %s | FileCheck %s
+
+target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
+target triple = "armv7--linux-gnueabihf"
+
+; CHECK-LABEL: f:
+; CHECK: str lr, [r0]
+define void @f(i32* %p) {
+  call void asm sideeffect "str lr, $0", "=*o"(i32* %p)
+  ret void
+}
\ No newline at end of file