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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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| .. | ||
| 2010-09-02-Trunc.ll | ||
| 2010-09-26-MergeConstantRange.ll | ||
| add.ll | ||
| alloca.ll | ||
| ashr.ll | ||
| basic.ll | ||
| conflict.ll | ||
| crash.ll | ||
| guards.ll | ||
| icmp.ll | ||
| non-null.ll | ||
| overflows.ll | ||
| phi-common-val.ll | ||
| pointer.ll | ||
| pr35807.ll | ||
| range.ll | ||
| sdiv.ll | ||
| select.ll | ||
| srem.ll | ||
| udiv.ll | ||
| urem.ll | ||