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[AMDGPU] Only unbundle memory accesses in SIMemoryLegalizer

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This restores previous behaviour and is a step toward removing
unbundling entirely.

Reviewed By: foad, rampitec

Differential Revision: https://reviews.llvm.org/D99061
This commit is contained in:
Carl Ritson 2021-03-23 10:56:56 +09:00
parent 0612d33cf4
commit 235428ba54
2 changed files with 2 additions and 2 deletions
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2
lib/Target/AMDGPU/SIMemoryLegalizer.cpp
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@ -1841,7 +1841,7 @@ bool SIMemoryLegalizer::runOnMachineFunction(MachineFunction &MF) {
for (auto MI = MBB.begin(); MI != MBB.end(); ++MI) {
// Unbundle instructions after the post-RA scheduler.
if (MI->isBundle()) {
if (MI->isBundle() && MI->mayLoadOrStore()) {
MachineBasicBlock::instr_iterator II(MI->getIterator());
for (MachineBasicBlock::instr_iterator I = ++II, E = MBB.instr_end();
I != E && I->isBundledWithPred(); ++I) {

2
test/CodeGen/AMDGPU/GlobalISel/extractelement.i128.ll
View File

@ -26,8 +26,8 @@ define amdgpu_ps i128 @extractelement_vgpr_v4i128_sgpr_idx(<4 x i128> addrspace(
; GFX9-NEXT: global_load_dwordx4 v[14:17], v[0:1], off offset:48
; GFX9-NEXT: s_lshl_b32 s0, s2, 1
; GFX9-NEXT: s_lshl_b32 s2, s0, 1
; GFX9-NEXT: s_set_gpr_idx_on s2, gpr_idx(SRC0)
; GFX9-NEXT: s_waitcnt vmcnt(0)
; GFX9-NEXT: s_set_gpr_idx_on s2, gpr_idx(SRC0)
; GFX9-NEXT: v_mov_b32_e32 v0, v2
; GFX9-NEXT: v_mov_b32_e32 v1, v3
; GFX9-NEXT: v_mov_b32_e32 v18, v2