GlobalISel: drop lifetime intrinsics during translation.

We don't use them yet and they just cause problems.

llvm-svn: 294770

1 files changed, 8 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
index 361efe6c1d6..97292dc5bd7 100644
--- a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -555,6 +555,14 @@ bool IRTranslator::translateKnownIntrinsic(const CallInst &CI, Intrinsic::ID ID,
   switch (ID) {
   default:
     break;
+  case Intrinsic::lifetime_start:
+  case Intrinsic::lifetime_end:
+    // Stack coloring is not enabled in O0 (which we care about now) so we can
+    // drop these. Make sure someone notices when we start compiling at higher
+    // opts though.
+    if (MF->getTarget().getOptLevel() != CodeGenOpt::None)
+      return false;
+    return true;
   case Intrinsic::dbg_declare: {
     const DbgDeclareInst &DI = cast<DbgDeclareInst>(CI);
     assert(DI.getVariable() && "Missing variable");