add support for returning 64bit values

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30103 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMISelDAGToDAG.cpp b/lib/Target/ARM/ARMISelDAGToDAG.cpp
index eba7c78aaa03eb66105c932898d02def85e54fc7..9a1949757400eaba98e07c7f3b2e973e6ad7b45f 100644 (file)
--- a/lib/Target/ARM/ARMISelDAGToDAG.cpp
+++ b/lib/Target/ARM/ARMISelDAGToDAG.cpp
@@ -238,6 +238,15 @@ static SDOperand LowerRET(SDOperand Op, SelectionDAG &DAG) {
     if (DAG.getMachineFunction().liveout_empty())
       DAG.getMachineFunction().addLiveOut(ARM::R0);
     break;
+  case 5:
+    Copy = DAG.getCopyToReg(Chain, ARM::R1, Op.getOperand(3), SDOperand());
+    Copy = DAG.getCopyToReg(Copy, ARM::R0, Op.getOperand(1), Copy.getValue(1));
+    // If we haven't noted the R0+R1 are live out, do so now.
+    if (DAG.getMachineFunction().liveout_empty()) {
+      DAG.getMachineFunction().addLiveOut(ARM::R0);
+      DAG.getMachineFunction().addLiveOut(ARM::R1);
+    }
+    break;
   }
 
   //We must use RET_FLAG instead of BRIND because BRIND doesn't have a flag

diff --git a/test/CodeGen/ARM/long.ll b/test/CodeGen/ARM/long.ll
new file mode 100644 (file)
index 0000000..f4ede17
--- /dev/null
+++ b/test/CodeGen/ARM/long.ll
@@ -0,0 +1,32 @@
+; RUN: llvm-as < %s | llc -march=arm &&
+; RUN: llvm-as < %s | llc -march=arm | grep "mov r1, #0" | wc -l | grep 4 &&
+; RUN: llvm-as < %s | llc -march=arm | grep "mov r0, #1" | wc -l | grep 1 &&
+; RUN: llvm-as < %s | llc -march=arm | grep "mov r0, #2147483647" | wc -l | grep 1 &&
+; RUN: llvm-as < %s | llc -march=arm | grep "mov r0, #-2147483648" | wc -l | grep 1 &&
+; RUN: llvm-as < %s | llc -march=arm | grep "mov r0, #-1" | wc -l | grep 1 &&
+; RUN: llvm-as < %s | llc -march=arm | grep "mov r1, #2147483647" | wc -l | grep 1
+
+long %f1() {
+entry:
+       ret long 0
+}
+
+long %f2() {
+entry:
+       ret long 1
+}
+
+long %f3() {
+entry:
+       ret long 2147483647
+}
+
+long %f4() {
+entry:
+       ret long 2147483648
+}
+
+long %f5() {
+entry:
+       ret long 9223372036854775807
+}