llvm/test/Transforms/CodeGenPrepare at ff80f7609dc9d90d449a2ebba62150c7305e8edc - llvm

RPCS3/llvm

mirror of https://github.com/RPCS3/llvm.git synced 2026-07-19 15:13:49 -04:00

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Simon Dardis ff80f7609d [CodeGenPrepare] Check that erased sunken address are not reused

CodeGenPrepare sinks address computations from one basic block to another
and attempts to reuse address computations that have already been sunk. If
the same address computation appears twice with the first instance as an
operand of a load whose result is an operand to a simplifable select,
CodeGenPrepare simplifies the select and recursively erases the now dead
instructions. CodeGenPrepare then attempts to use the erased address
computation for the second load.

Fix this by erasing the cached address value if it has zero uses before
looking for the address value in the sunken address map.

This partially resolves PR35209.

Thanks to Alexander Richardson for reporting the issue!

Reviewers: john.brawn

Differential Revision: https://reviews.llvm.org/D39841


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@318032 91177308-0d34-0410-b5e6-96231b3b80d8

2017-11-13 11:47:21 +00:00

AArch64

Fix some misc. -enable-var-scope violations

2017-11-13 01:47:52 +00:00

AMDGPU

AMDGPU: Mark all unspecified CC functions in tests as amdgpu_kernel

2017-03-21 21:39:51 +00:00

ARM

[CGP] Disable Select instruction handling in optimizeMemoryInst. NFC

2017-11-07 09:43:08 +00:00

Mips

[CodeGenPrepare] Check that erased sunken address are not reused