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(parent: 40fefe0) | patch
[ImplicitNullChecks] Work with implicit defs.
authorSanjoy Das <sanjoy@playingwithpointers.com>
Mon, 20 Jul 2015 20:31:39 +0000 (20:31 +0000)
committerSanjoy Das <sanjoy@playingwithpointers.com>
Mon, 20 Jul 2015 20:31:39 +0000 (20:31 +0000)
commita4b0d863f94612ce83fd9cae7143e24adb67f668
treef0f714cfca1da291de5900a2ec69380275d8c414tree | snapshot
parent40fefe0084d266d3c6d03e98a3c8c16e76091932commit | diff
[ImplicitNullChecks] Work with implicit defs.

Summary:
This change generalizes the implicit null checks pass to work with
instructions that don't have any explicit register defs.  This lets us
use X86's `cmp` against memory as faulting load instructions.

Reviewers: reames, JosephTremoulet

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D11286

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242703 91177308-0d34-0410-b5e6-96231b3b80d8
lib/CodeGen/ImplicitNullChecks.cpp diff | blob | history
lib/Target/X86/X86MCInstLower.cpp diff | blob | history
test/CodeGen/X86/implicit-null-check.ll diff | blob | history
C/C++ LLVM-based compilers that forbids OOTA behaviors