[ARM] Handle the inline asm constraint type 'o'

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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251280 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMISelDAGToDAG.cpp b/lib/Target/ARM/ARMISelDAGToDAG.cpp
index dc9eefe6ade1091a3fa6ac65114f9d39204225ff..cd73021dfc62cc7867429df8e6da2ba8a79a665b 100644 (file)
--- a/lib/Target/ARM/ARMISelDAGToDAG.cpp
+++ b/lib/Target/ARM/ARMISelDAGToDAG.cpp
@@ -3924,6 +3924,7 @@ SelectInlineAsmMemoryOperand(const SDValue &Op, unsigned ConstraintID,
     //        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:

diff --git a/lib/Target/ARM/ARMISelLowering.h b/lib/Target/ARM/ARMISelLowering.h
index 1c260f253ec225c2930e1ecf899d88e87c065c28..e4b8891728b94950c3b47f7e65d68c6265cf4dbd 100644 (file)
--- a/lib/Target/ARM/ARMISelLowering.h
+++ b/lib/Target/ARM/ARMISelLowering.h
@@ -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]) {

diff --git a/test/CodeGen/ARM/pr25317.ll b/test/CodeGen/ARM/pr25317.ll
new file mode 100644 (file)
index 0000000..6770c6f
--- /dev/null
+++ b/test/CodeGen/ARM/pr25317.ll
@@ -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