Fix the issue that r143552 was trying to address the _right_ way. One-register lists are legal on LDM/STM instructions, but we should not print the PUSH/POP aliases when they appear. This fixes round tripping on this instruction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143557 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/InstPrinter/ARMInstPrinter.cpp b/lib/Target/ARM/InstPrinter/ARMInstPrinter.cpp
index e4a56be..844e3ab 100644
--- a/lib/Target/ARM/InstPrinter/ARMInstPrinter.cpp
+++ b/lib/Target/ARM/InstPrinter/ARMInstPrinter.cpp
@@ -101,7 +101,9 @@
// A8.6.123 PUSH
if ((Opcode == ARM::STMDB_UPD || Opcode == ARM::t2STMDB_UPD) &&
- MI->getOperand(0).getReg() == ARM::SP) {
+ MI->getOperand(0).getReg() == ARM::SP &&
+ MI->getNumOperands() > 5) {
+ // Should only print PUSH if there are at least two registers in the list.
O << '\t' << "push";
printPredicateOperand(MI, 2, O);
if (Opcode == ARM::t2STMDB_UPD)
@@ -122,7 +124,9 @@
// A8.6.122 POP
if ((Opcode == ARM::LDMIA_UPD || Opcode == ARM::t2LDMIA_UPD) &&
- MI->getOperand(0).getReg() == ARM::SP) {
+ MI->getOperand(0).getReg() == ARM::SP &&
+ MI->getNumOperands() > 5) {
+ // Should only print POP if there are at least two registers in the list.
O << '\t' << "pop";
printPredicateOperand(MI, 2, O);
if (Opcode == ARM::t2LDMIA_UPD)