[clang][NewPM] Fix broken -O0 test from the AlwaysInliner

This contains the part of D62225 which prevents insertion of lifetime
intrinsics when creating the AlwaysInliner. This fixes the following tests
when the new PM is enabled by default:

Clang :: CodeGen/aarch64-neon-across.c
Clang :: CodeGen/aarch64-neon-fcvt-intrinsics.c
Clang :: CodeGen/aarch64-neon-fma.c
Clang :: CodeGen/aarch64-neon-perm.c
Clang :: CodeGen/aarch64-neon-tbl.c
Clang :: CodeGen/aarch64-poly128.c
Clang :: CodeGen/aarch64-v8.2a-neon-intrinsics.c
Clang :: CodeGen/arm-neon-fma.c
Clang :: CodeGen/arm-neon-numeric-maxmin.c
Clang :: CodeGen/arm-neon-vcvtX.c
Clang :: CodeGen/avx-builtins.c
Clang :: CodeGen/builtins-ppc-p9vector.c
Clang :: CodeGen/builtins-ppc-vsx.c
Clang :: CodeGen/lifetime.c
Clang :: CodeGen/sse-builtins.c
Clang :: CodeGen/sse2-builtins.c

Differential Revision: https://reviews.llvm.org/D63153

llvm-svn: 363277

1 files changed, 4 insertions, 2 deletions

diff --git a/clang/lib/CodeGen/BackendUtil.cpp b/clang/lib/CodeGen/BackendUtil.cpp
index ec7c62dae24..b311047c43f 100644
--- a/clang/lib/CodeGen/BackendUtil.cpp
+++ b/clang/lib/CodeGen/BackendUtil.cpp
@@ -1111,8 +1111,10 @@ void EmitAssemblyHelper::EmitAssemblyWithNewPassManager(
         MPM.addPass(InstrProfiling(*Options, false));
 
       // Build a minimal pipeline based on the semantics required by Clang,
-      // which is just that always inlining occurs.
-      MPM.addPass(AlwaysInlinerPass());
+      // which is just that always inlining occurs. Further, disable generating
+      // lifetime intrinsics to avoid enabling further optimizations during
+      // code generation.
+      MPM.addPass(AlwaysInlinerPass(/*InsertLifetimeIntrinsics=*/false));
 
       // At -O0 we directly run necessary sanitizer passes.
       if (LangOpts.Sanitize.has(SanitizerKind::LocalBounds))