llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-03-27 14:32:21 +00:00

History

Jakob Stoklund Olesen e2b83ab056 Avoid creating dangling physreg live ranges during DCE.

LiveRangeEdit::eliminateDeadDefs() can delete a dead instruction that
reads unreserved physregs. This would leave the corresponding regunit
live interval dangling because we don't have shrinkToUses() for physical
registers.

Fix this problem by turning the instruction into a KILL instead of
deleting it. This happens in a landing pad in
test/CodeGen/X86/2012-05-19-CoalescerCrash.ll:

  %vreg27<def,dead> = COPY %EDX<kill>; GR32:%vreg27

becomes:

  KILL %EDX<kill>

An upcoming fix to the machine verifier will catch problems like this by
verifying regunit live intervals.

This fixes PR13498. I am not including the test case from the PR since
we already have one exposing the problem once the verifier is fixed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161182 91177308-0d34-0410-b5e6-96231b3b80d8

2012-08-02 16:36:47 +00:00

Analysis

Implement the block_iterator of Region based on df_iterator.

2012-08-02 14:20:02 +00:00

Archive

Include cstdio in a few place that depended on getting it transitively through StringExtras.h

2012-03-23 11:35:30 +00:00

AsmParser

Extend the IL for selecting TLS models (PR9788)

2012-06-23 11:37:03 +00:00

Bitcode

Remove tabs.