forked from OSchip/llvm-project
77eeac3d9e
Summary: Support for this option is needed for building Linux kernel. This is a very frequently requested feature by kernel developers. More details : https://lkml.org/lkml/2018/4/4/601 GCC option description for -fdelete-null-pointer-checks: This Assume that programs cannot safely dereference null pointers, and that no code or data element resides at address zero. -fno-delete-null-pointer-checks is the inverse of this implying that null pointer dereferencing is not undefined. This feature is implemented in LLVM IR in this CL as the function attribute "null-pointer-is-valid"="true" in IR (Under review at D47894). The CL updates several passes that assumed null pointer dereferencing is undefined to not optimize when the "null-pointer-is-valid"="true" attribute is present. Reviewers: t.p.northover, efriedma, jyknight, chandlerc, rnk, srhines, void, george.burgess.iv Reviewed By: efriedma, george.burgess.iv Subscribers: eraman, haicheng, george.burgess.iv, drinkcat, theraven, reames, sanjoy, xbolva00, llvm-commits Differential Revision: https://reviews.llvm.org/D47895 llvm-svn: 336613 |
||
|---|---|---|
| .. | ||
| 2008-06-09-WeakProp.ll | ||
| 2009-09-24-byval-ptr.ll | ||
| PR16052.ll | ||
| PR26044.ll | ||
| comdat-ipo.ll | ||
| dangling-block-address.ll | ||
| deadarg.ll | ||
| fp-bc-icmp-const-fold.ll | ||
| global.ll | ||
| musttail-call.ll | ||
| naked-return.ll | ||
| recursion.ll | ||
| remove-call-inst.ll | ||
| return-argument.ll | ||
| return-constant.ll | ||
| return-constants.ll | ||
| user-with-multiple-uses.ll | ||