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# RUN: llc -march=hexagon -run-pass=hexagon-rdf-opt -hexagon-rdf-dump -verify-machineinstrs -o /dev/null %s 2>&1 | FileCheck %s
# Check that RDF graph has a phi node for R28 register in bb.3 and bb.4
# R28 is clobbered by memcpy call. The clobbering def must be present in bb.4's IDF
# This phi node should prevent $r27 from being replaced by $r28 by RDF copy propagation
#CHECK-LABEL: Starting copy propagation on: foo
#CHECK-LABEL: --- %bb.3 ---
#CHECK: p{{[0-9]+}}: phi [+d{{[0-9]+}}<R28>
#CHECK-LABEL: --- %bb.4 ---
#CHECK: p{{[0-9]+}}: phi [+d{{[0-9]+}}<R28>
#CHECK-LABEL: After Hexagon RDF optimizations
#CHECK-LABEL: bb.3:
#CHECK: renamable $r0 = A2_add renamable $r27
--- |
define internal fastcc void @foo() unnamed_addr {
entry:
ret void
}
declare void @llvm.memcpy.p0.p0.i32(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i32, i1 immarg)
---
name: foo
alignment: 16
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
failedISel: false
tracksRegLiveness: true
hasWinCFI: false
callsEHReturn: false
callsUnwindInit: false
hasEHContTarget: false
hasEHScopes: false
hasEHFunclets: false
isOutlined: false
debugInstrRef: false
failsVerification: false
tracksDebugUserValues: true
registers: []
liveins:
- { reg: '$d0', virtual-reg: '' }
- { reg: '$d3', virtual-reg: '' }
- { reg: '$r23', virtual-reg: '' }
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 0
offsetAdjustment: 0
maxAlignment: 8
adjustsStack: true
hasCalls: true
stackProtector: ''
functionContext: ''
maxCallFrameSize: 4294967295
cvBytesOfCalleeSavedRegisters: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
hasTailCall: false
isCalleeSavedInfoValid: false
localFrameSize: 0
savePoint: ''
restorePoint: ''
fixedStack:
- { id: 0, type: default, offset: 40, size: 8, alignment: 8, stack-id: default,
isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
stack:
- { id: 0, name: '', type: spill-slot, offset: 0, size: 8, alignment: 8,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
- { id: 1, name: '', type: spill-slot, offset: 0, size: 8, alignment: 8,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
- { id: 2, name: '', type: spill-slot, offset: 0, size: 8, alignment: 8,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
- { id: 3, name: '', type: spill-slot, offset: 0, size: 8, alignment: 8,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
entry_values: []
callSites: []
debugValueSubstitutions: []
constants: []
machineFunctionInfo: {}
body: |
bb.0.entry:
successors: %bb.1
liveins: $d0, $d3, $r23
J2_jump %bb.1, implicit-def dead $pc
bb.1:
successors: %bb.2
liveins: $d0:0x0000000000000003, $d3:0x0000000000000003, $r23
renamable $r28 = L2_loadri_io %fixed-stack.0, 0 :: (load (s32) from %fixed-stack.0)
renamable $r27 = COPY killed renamable $r28
bb.2:
successors: %bb.3
liveins: $d0:0x0000000000000003, $d3:0x0000000000000003, $r23, $r27
renamable $d10 = L2_loadrd_io %stack.0, 0 :: (load (s64) from %stack.0)
renamable $d11 = L2_loadrd_io %stack.1, 0 :: (load (s64) from %stack.1)
bb.3:
successors: %bb.4, %bb.3
liveins: $d0:0x0000000000000003, $d3:0x0000000000000003, $d10:0x0000000000000003, $d11:0x0000000000000002, $r23, $r27
ADJCALLSTACKDOWN 0, 0, implicit-def $r29, implicit-def dead $r30, implicit $r31, implicit $r30, implicit $r29
renamable $r1 = A2_add renamable $r23, killed renamable $r0
$r2 = COPY renamable $r22
renamable $r0 = A2_add renamable $r27, killed renamable $r6
J2_call &memcpy, hexagoncsr, implicit-def dead $pc, implicit-def dead $r31, implicit $r29, implicit $r0, implicit $r1, implicit $r2, implicit-def $r29, implicit-def dead $r0
renamable $p0 = C2_cmpgtp renamable $d11, renamable $d10
ADJCALLSTACKUP 0, 0, implicit-def dead $r29, implicit-def dead $r30, implicit-def dead $r31, implicit $r29
J2_jumpt killed renamable $p0, %bb.3, implicit-def dead $pc
J2_jump %bb.4, implicit-def dead $pc
bb.4:
successors: %bb.5, %bb.2
liveins: $d10:0x0000000000000003, $d11:0x0000000000000002, $r23, $r27
renamable $d0 = L2_loadrd_io %stack.2, 0 :: (load (s64) from %stack.2)
renamable $d3 = L2_loadrd_io %stack.3, 0 :: (load (s64) from %stack.3)
renamable $p0 = C2_cmpgtp killed renamable $d0, killed renamable $d3
J2_jumpt killed renamable $p0, %bb.2, implicit-def dead $pc
J2_jump %bb.5, implicit-def dead $pc
bb.5:
PS_jmpret $r31, implicit-def dead $pc
...
|
