tree eead1a5a89b3b4e1aa6e6c983fc046d81a8fd1c1
parent 244acbf1e23ea39ed5ecddeebce700c34e2415ed
author Roman Lebedev <lebedev.ri@gmail.com> 1567785763 +0000
committer Roman Lebedev <lebedev.ri@gmail.com> 1567785763 +0000

[MiBench] consumer-typeset: z31: GetMemory(): don't apply offset to nullptr, it's UB

Caught by D67122

/repositories/llvm-test-suite/MultiSource/Benchmarks/MiBench/consumer-typeset/z31.c:352:8: runtime error: applying non-zero offset 96 to null pointer
    #0 0x2e682c in GetMemory (/builddirs/build-test-suite-new/MultiSource/Benchmarks/MiBench/consumer-typeset/consumer-typeset+0x2e682c)
    #1 0x258c4b in InitFiles (/builddirs/build-test-suite-new/MultiSource/Benchmarks/MiBench/consumer-typeset/consumer-typeset+0x258c4b)
    #2 0x24d34e in main (/builddirs/build-test-suite-new/MultiSource/Benchmarks/MiBench/consumer-typeset/consumer-typeset+0x24d34e)
    #3 0x7fe3fb2ac09a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2409a)
    #4 0x22e029 in _start (/builddirs/build-test-suite-new/MultiSource/Benchmarks/MiBench/consumer-typeset/consumer-typeset+0x22e029)

After that if() the code expects to have enough memory,
so the branch should be unconditionally taken if next_free == nullptr,

llvm-svn: 371219