StackProtector: Use PointerMayBeCaptured

This was using its own, outdated list of possible captures. This was
at minimum not catching cmpxchg and addrspacecast captures.

One change is now any volatile access is treated as capturing. The
test coverage for this pass is quite inadequate, but this required
removing volatile in the lifetime capture test.

Also fixes some infrastructure issues to allow running just the IR
pass.

Fixes bug 42238.

llvm-svn: 363169

1 files changed, 1 insertions, 0 deletions

diff --git a/llvm/tools/opt/opt.cpp b/llvm/tools/opt/opt.cpp
index 4871eb2058c..4410b4c1679 100644
--- a/llvm/tools/opt/opt.cpp
+++ b/llvm/tools/opt/opt.cpp
@@ -517,6 +517,7 @@ int main(int argc, char **argv) {
   initializeDwarfEHPreparePass(Registry);
   initializeSafeStackLegacyPassPass(Registry);
   initializeSjLjEHPreparePass(Registry);
+  initializeStackProtectorPass(Registry);
   initializePreISelIntrinsicLoweringLegacyPassPass(Registry);
   initializeGlobalMergePass(Registry);
   initializeIndirectBrExpandPassPass(Registry);