forked from OSchip/llvm-project
4b027e8f89
Summary: After RS4GC, we should drop metadata that is no longer valid. These metadata is used by optimizations scheduled after RS4GC, and can cause a miscompile. One such metadata is invariant.load which is used by LICM sinking transform. After rewriting statepoints, the address of a load maybe relocated. With invariant.load metadata on a load instruction, LICM sinking assumes the loaded value (from a dererenceable address) to be invariant, and rematerializes the load operand and the load at the exit block. This transforms the IR to have an unrelocated use of the address after a statepoint, which is incorrect. Other metadata we conservatively remove are related to dereferenceability and noalias metadata. This patch drops such metadata on store and load instructions after rewriting statepoints. Reviewers: reames, sanjoy, apilipenko Reviewed by: reames Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D33756 llvm-svn: 305234 |
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| .. | ||
| base-pointers-1.ll | ||
| base-pointers-2.ll | ||
| base-pointers-3.ll | ||
| base-pointers-4.ll | ||
| base-pointers-5.ll | ||
| base-pointers-6.ll | ||
| base-pointers-7.ll | ||
| base-pointers-8.ll | ||
| base-pointers-9.ll | ||
| base-pointers-10.ll | ||
| base-pointers-11.ll | ||
| base-pointers-12.ll | ||
| base-pointers-13.ll | ||
| base-pointers.ll | ||
| base-vector.ll | ||
| basic.ll | ||
| basics.ll | ||
| call-gc-result.ll | ||
| codegen-cond.ll | ||
| constants.ll | ||
| deopt-intrinsic-cconv.ll | ||
| deopt-intrinsic.ll | ||
| deopt-lowering-attrs.ll | ||
| deref-pointers.ll | ||
| drop-invalid-metadata.ll | ||
| gc-relocate-creation.ll | ||
| invokes.ll | ||
| leaf-function.ll | ||
| live-vector-nosplit.ll | ||
| liveness-basics.ll | ||
| patchable-statepoints.ll | ||
| preprocess.ll | ||
| relocate-invoke-result.ll | ||
| relocation.ll | ||
| rematerialize-derived-pointers.ll | ||
| rewrite-invoke.ll | ||
| statepoint-attrs.ll | ||
| statepoint-calling-conventions.ll | ||
| statepoint-coreclr.ll | ||
| statepoint-format.ll | ||
| two-invokes-one-landingpad.ll | ||