[WebAssembly] Handle debug information and virtual registers without crashing (reland r278967)
Summary: Currently, enabling debug information when compiling for WebAssembly crashes the backend. This commit fixes these by skipping debug values in backend passes.
Reviewers: jfb, aprantl, dschuff, echristo
Subscribers: llvm-commits, dschuff, jfb, MatzeB, dexonsmith, yurydelendik, mehdi_amini
Differential Revision: https://reviews.llvm.org/D23635
llvm-svn: 279011
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyRegStackify.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyRegStackify.cpp
index aa40098..fba1fda 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyRegStackify.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyRegStackify.cpp
@@ -255,7 +255,7 @@
const VNInfo *DefVNI = LI.getVNInfoAt(
LIS.getInstructionIndex(*Def).getRegSlot());
assert(DefVNI);
- for (auto I : MRI.use_nodbg_operands(Reg)) {
+ for (auto &I : MRI.use_nodbg_operands(Reg)) {
const auto &Result = LI.Query(LIS.getInstructionIndex(*I.getParent()));
if (Result.valueIn() == DefVNI) {
if (!Result.isKill())
@@ -360,7 +360,7 @@
const MachineInstr *OneUseInst = OneUse.getParent();
VNInfo *OneUseVNI = LI.getVNInfoBefore(LIS.getInstructionIndex(*OneUseInst));
- for (const MachineOperand &Use : MRI.use_operands(Reg)) {
+ for (const MachineOperand &Use : MRI.use_nodbg_operands(Reg)) {
if (&Use == &OneUse)
continue;