[PATCH] When stripping debug info, also rewrite @llvm.debugtrap to @llvm.trap.

[Richard Diamond]

Hi jfb,

REPOSITORY
  rL LLVM

http://reviews.llvm.org/D10349

Files:
  lib/IR/DebugInfo.cpp
  test/CodeGen/X86/trap.ll
  test/DebugInfo/rewrite-debug-trap.ll

Index: lib/IR/DebugInfo.cpp
===================================================================
--- lib/IR/DebugInfo.cpp
+++ lib/IR/DebugInfo.cpp
@@ -343,6 +343,18 @@
     Changed = true;
   }
 
+  // Rewrite `@llvm.debugtrap` to `@llvm.trap`.
+  if (Function *DbgTrap = M.getFunction("llvm.debugtrap")) {
+    Function* Trap = Intrinsic::getDeclaration(&M, Intrinsic::trap);
+    while (!DbgTrap->use_empty()) {
+      CallInst *CI = cast<CallInst>(DbgTrap->user_back());
+      CallInst::Create(Trap, None, "", CI);
+      CI->eraseFromParent();
+    }
+    DbgTrap->eraseFromParent();
+    Changed = true;
+  }
+
   for (Module::named_metadata_iterator NMI = M.named_metadata_begin(),
          NME = M.named_metadata_end(); NMI != NME;) {
     NamedMDNode *NMD = NMI;
Index: test/CodeGen/X86/trap.ll
===================================================================
--- test/CodeGen/X86/trap.ll
+++ test/CodeGen/X86/trap.ll
@@ -26,6 +26,9 @@
 	unreachable
 }
 
-declare void @llvm.trap() nounwind 
-declare void @llvm.debugtrap() nounwind 
+declare void @llvm.trap() nounwind
+declare void @llvm.debugtrap() nounwind
 
+!llvm.module.flags = !{!0}
+
+!0 = !{i32 2, !"Debug Info Version", i32 3}
Index: test/DebugInfo/rewrite-debug-trap.ll
===================================================================
--- /dev/null
+++ test/DebugInfo/rewrite-debug-trap.ll
@@ -0,0 +1,13 @@
+; RUN: opt -strip-debug < %s -S | FileCheck %s
+
+; CHECK-NOT: llvm.debugtrap
+
+declare void @llvm.debugtrap()
+
+; CHECK-LABEL: @call_debugtrap
+define void @call_debugtrap() {
+entry:
+; CHECK: call void @llvm.trap()
+  call void @llvm.debugtrap()
+  ret void
+}

EMAIL PREFERENCES
  http://reviews.llvm.org/settings/panel/emailpreferences/
-------------- next part --------------
A non-text attachment was scrubbed...
Name: D10349.27411.patch
Type: text/x-patch
Size: 1651 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20150609/23a3dead/attachment.bin>