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[pull] master from llvm:master #2031

Merged
merged 2 commits into from
Dec 14, 2019
Merged

[pull] master from llvm:master #2031

merged 2 commits into from
Dec 14, 2019

Commits on Dec 14, 2019

  1. AArch64: Fix frame record chain 

    The commit r369122 may keep LR and FP register (aka. frame record) in
the middle of a frame, thus we must add the offsets to ensure the FP
register always points to innermost frame record on the stack.

According to AAPCS64[1], a conforming code shall construct a linked list
of stack frames that can be traversed with frame records.  This commit
is also essential to frame-pointer-based stack unwinder (e.g.  the stack
unwinder in linx-perf-tools.)

[1] https://github.com/ARM-software/software-standards/blob/master/abi/aapcs64/aapcs64.rst#the-frame-pointer

Test: llvm-lit ${LLVM_SRC}/test/CodeGen/AArch64/framelayout-frame-record.ll
Test: llvm-lit ${LLVM_SRC}/test/CodeGen/AArch64

Differential Revision: https://reviews.llvm.org/D70800
    @loganchien
    loganchien committed Dec 14, 2019
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  2. gn build: (manually and belatedly) merge ed153ef

    @nico
    nico committed Dec 14, 2019
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