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[LiveIntervals] Repair subreg ranges in processTiedPairs 

In TwoAddressInstructionPass::processTiedPairs, update subranges of the
live interval for RegB as well as the main range.

This is a small step towards switching TwoAddressInstructionPass over
from LiveVariables to LiveIntervals. Currently this path is only tested
if you explicitly enable -early-live-intervals.

Differential Revision: https://reviews.llvm.org/D110526
This commit is contained in:
Jay Foad 2021-09-24 16:50:55 +01:00
parent b2b1a8b833
commit 20c0280733
4 changed files with 7 additions and 0 deletions
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4
llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
View File

@ -1453,6 +1453,10 @@ TwoAddressInstructionPass::processTiedPairs(MachineInstr *MI,
SlotIndex endIdx =
LIS->getInstructionIndex(*MI).getRegSlot(IsEarlyClobber);
LI.addSegment(LiveInterval::Segment(LastCopyIdx, endIdx, VNI));
for (auto &S : LI.subranges()) {
VNI = S.getNextValue(LastCopyIdx, LIS->getVNInfoAllocator());
S.addSegment(LiveInterval::Segment(LastCopyIdx, endIdx, VNI));
}
}
}

1
llvm/test/CodeGen/Hexagon/swp-vect-dotprod.ll
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@ -1,6 +1,7 @@
; RUN: llc -march=hexagon -mcpu=hexagonv5 -enable-pipeliner < %s -pipeliner-experimental-cg=true | FileCheck %s
; RUN: llc -march=hexagon -mcpu=hexagonv5 -O2 < %s -pipeliner-experimental-cg=true | FileCheck %s
; RUN: llc -march=hexagon -mcpu=hexagonv5 -O3 < %s -pipeliner-experimental-cg=true | FileCheck %s
; RUN: llc -march=hexagon -mcpu=hexagonv5 -enable-pipeliner < %s -pipeliner-experimental-cg=true -early-live-intervals -verify-machineinstrs | FileCheck %s
;
; Check that we pipeline a vectorized dot product in a single packet.
;

1
llvm/test/CodeGen/SystemZ/subregliveness-01.ll
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@ -1,4 +1,5 @@
; RUN: llc -mtriple=s390x-linux-gnu -mcpu=z13 -verify-machineinstrs -systemz-subreg-liveness < %s | FileCheck %s
; RUN: llc -mtriple=s390x-linux-gnu -mcpu=z13 -verify-machineinstrs -systemz-subreg-liveness -early-live-intervals < %s | FileCheck %s
; Check for successful compilation.
; CHECK: lgfrl %r0, g_399

1
llvm/test/CodeGen/Thumb2/mve-multivec-spill.ll
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@ -1,5 +1,6 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=thumbv8.1m.main-none-none-eabi -O3 -mattr=+mve %s -o - | FileCheck %s
; RUN: llc -mtriple=thumbv8.1m.main-none-none-eabi -O3 -mattr=+mve -early-live-intervals -verify-machineinstrs %s -o - | FileCheck %s
declare void @external_function()