commit a8a638292ced193f5e00dd1e087b46790cf540cb
author Dominic Chen <d.c.ddcc@gmail.com> Wed Aug 17 23:42:27 2016 +0000
committer Dominic Chen <d.c.ddcc@gmail.com> Wed Aug 17 23:42:27 2016 +0000
tree 25956cc962bdbe63f26a3ec8f6e3713ba99bbc0f
parent 334ac36e667273c641eaf22e39511eddd6432752

[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

llvm/lib/Target/WebAssembly/WebAssemblyReplacePhysRegs.cpp

diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyReplacePhysRegs.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyReplacePhysRegs.cpp
index 11bda47..1a83793 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyReplacePhysRegs.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyReplacePhysRegs.cpp
@@ -88,6 +88,8 @@
         if (VReg == WebAssembly::NoRegister)
           VReg = MRI.createVirtualRegister(RC);
         MO.setReg(VReg);
+        if (MO.getParent()->isDebugValue())
+          MO.setIsDebug();
         Changed = true;
       }
     }