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647946fa14
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 |
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| .. | ||
| 2008-09-03-Mutual.ll | ||
| 2008-09-03-ReadNone.ll | ||
| 2008-09-03-ReadOnly.ll | ||
| 2008-09-13-VolatileRead.ll | ||
| 2008-12-29-Constant.ll | ||
| 2009-01-02-LocalStores.ll | ||
| 2010-10-30-volatile.ll | ||
| assume.ll | ||
| atomic.ll | ||
| comdat-ipo.ll | ||
| convergent.ll | ||
| int_sideeffect.ll | ||
| naked_functions.ll | ||
| nocapture.ll | ||
| nonnull-global.ll | ||
| nonnull.ll | ||
| norecurse.ll | ||
| operand-bundles-scc.ll | ||
| optnone-simple.ll | ||
| optnone.ll | ||
| out-of-bounds-iterator-bug.ll | ||
| readattrs.ll | ||
| readnone.ll | ||
| returned.ll | ||