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[Statepoint] Handle 'undef' operand tied to def
FixupStatepoints pass does not take into account the undef use it skips may have a tied def. So when defs are handled pass considers that tied-use should be spilled and triggers an assert. FixupStatepoints should skip undef def as well. Reviewers: reames, dantrushin Reviewed By: dantrushin Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D95858
This commit is contained in:
Serguei Katkov
parent
d2c15b833e
commit
8e11f021aa
@ -484,6 +484,16 @@ public:
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MachineOperand &DefMO = MI.getOperand(I);
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assert(DefMO.isReg() && DefMO.isDef() && "Expected Reg Def operand");
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Register Reg = DefMO.getReg();
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assert(DefMO.isTied() && "Def is expected to be tied");
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// We skipped undef uses and did not spill them, so we should not
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// proceed with defs here.
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if (MI.getOperand(MI.findTiedOperandIdx(I)).isUndef()) {
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if (AllowGCPtrInCSR) {
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NewIndices.push_back(NewMI->getNumOperands());
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MIB.addReg(Reg, RegState::Define);
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}
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continue;
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}
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if (!AllowGCPtrInCSR) {
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assert(is_contained(RegsToSpill, Reg));
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RegsToReload.push_back(Reg);
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150
test/CodeGen/X86/statepoint-fixup-undef-def.mir
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150
test/CodeGen/X86/statepoint-fixup-undef-def.mir
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@ -0,0 +1,150 @@
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# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
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# RUN: llc -x mir -run-pass fixup-statepoint-caller-saved -verify-machineinstrs < %s | FileCheck %s
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--- |
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; ModuleID = 'undef.ll'
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source_filename = "test_undef.ll"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define void @test_undef(i8 addrspace(1)* %arg1, i8 addrspace(1)* %arg2, i8 addrspace(1)* %arg3, i8 addrspace(1)* %arg4) #0 gc "statepoint-example" {
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bb:
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%tmp1 = lshr i32 0, undef
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%tmp2 = load atomic i32, i32 addrspace(1)* undef unordered, align 8
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%tmp3 = load atomic i32, i32 addrspace(1)* undef unordered, align 8
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%tmp19 = inttoptr i64 undef to i8 addrspace(1)*
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br label %bb7
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bb7: ; preds = %bb
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%tmp4 = icmp slt i32 %tmp3, undef
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%tmp5 = select i1 %tmp4, i32 6, i32 undef
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%tmp6 = add i32 %tmp5, %tmp2
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%tmp7 = call i8 addrspace(1)* @wombat()
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%tmp20 = call token (i64, i32, void (i8 addrspace(1)*, i32, i32, i8 addrspace(1)*, i32)*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidp1i8i32i32p1i8i32f(i64 2, i32 5, void (i8 addrspace(1)*, i32, i32, i8 addrspace(1)*, i32)* nonnull @hoge, i32 5, i32 0, i8 addrspace(1)* %tmp19, i32 %tmp2, i32 %tmp6, i8 addrspace(1)* %tmp7, i32 0, i32 0, i32 0) [ "deopt"(i8 addrspace(1)* %tmp19, i8 addrspace(1)* %arg1, i8 addrspace(1)* %arg3, i8 addrspace(1)* %arg4, i32 %tmp2, i32 %tmp1, i32 %tmp5), "gc-live"(i8 addrspace(1)* %tmp19, i8 addrspace(1)* %arg2) ]
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%tmp21 = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %tmp20, i32 0, i32 0) ; (%tmp19, %tmp19)
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%tmp22 = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %tmp20, i32 1, i32 1) ; (%arg2, %arg2)
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ret void
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}
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declare void @hoge(i8 addrspace(1)*, i32, i32, i8 addrspace(1)*, i32) #0
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declare i8 addrspace(1)* @wombat() #0
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; Function Attrs: nounwind readonly
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declare i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token, i32 immarg, i32 immarg) #1
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declare token @llvm.experimental.gc.statepoint.p0f_isVoidp1i8i32i32p1i8i32f(i64 immarg, i32 immarg, void (i8 addrspace(1)*, i32, i32, i8 addrspace(1)*, i32)*, i32 immarg, i32 immarg, ...)
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attributes #0 = { "target-cpu"="broadwell" }
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attributes #1 = { nounwind readonly }
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...
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---
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name: test_undef
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alignment: 16
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exposesReturnsTwice: false
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legalized: false
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regBankSelected: false
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selected: false
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failedISel: false
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tracksRegLiveness: true
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hasWinCFI: false
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registers: []
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liveins:
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- { reg: '$rdi', virtual-reg: '' }
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- { reg: '$rsi', virtual-reg: '' }
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- { reg: '$rdx', virtual-reg: '' }
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- { reg: '$rcx', virtual-reg: '' }
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frameInfo:
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isFrameAddressTaken: false
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isReturnAddressTaken: false
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hasStackMap: false
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hasPatchPoint: false
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stackSize: 0
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offsetAdjustment: 0
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maxAlignment: 8
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adjustsStack: false
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hasCalls: true
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stackProtector: ''
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maxCallFrameSize: 4294967295
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cvBytesOfCalleeSavedRegisters: 0
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hasOpaqueSPAdjustment: false
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hasVAStart: false
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hasMustTailInVarArgFunc: false
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localFrameSize: 0
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savePoint: ''
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restorePoint: ''
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fixedStack: []
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stack:
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- { id: 0, name: '', type: default, offset: 0, size: 8, alignment: 8,
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stack-id: default, callee-saved-register: '', callee-saved-restored: true,
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debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
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- { id: 1, name: '', type: default, offset: 0, size: 8, alignment: 8,
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stack-id: default, callee-saved-register: '', callee-saved-restored: true,
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debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
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- { id: 2, name: '', type: default, offset: 0, size: 8, alignment: 8,
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stack-id: default, callee-saved-register: '', callee-saved-restored: true,
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debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
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callSites: []
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debugValueSubstitutions: []
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constants: []
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machineFunctionInfo: {}
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body: |
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; CHECK-LABEL: name: test_undef
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; CHECK: bb.0.bb:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: liveins: $rcx, $rdi, $rdx, $rsi
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; CHECK: renamable $r15 = COPY $rcx
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; CHECK: renamable $r12 = COPY $rdx
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; CHECK: renamable $r14 = COPY $rsi
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; CHECK: renamable $r13 = COPY $rdi
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; CHECK: renamable $ebx = MOV32rm undef renamable $rax, 1, $noreg, 0, $noreg, implicit-def $rbx :: (load unordered 4 from `i32 addrspace(1)* undef`, align 8, addrspace 1)
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; CHECK: bb.1.bb7:
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; CHECK: liveins: $rbx, $r12, $r13, $r14, $r15
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; CHECK: renamable $ebp = LEA64_32r renamable $rbx, 1, $noreg, 6, $noreg
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; CHECK: ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK: CALL64pcrel32 target-flags(x86-plt) @wombat, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
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; CHECK: ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK: MOV64mr %stack.0, 1, $noreg, 0, $noreg, killed renamable $r13 :: (store 8 into %stack.0)
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; CHECK: MOV64mr %stack.1, 1, $noreg, 0, $noreg, killed renamable $r12 :: (store 8 into %stack.1)
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; CHECK: MOV64mr %stack.2, 1, $noreg, 0, $noreg, killed renamable $r15 :: (store 8 into %stack.2)
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; CHECK: ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK: $esi = COPY renamable $ebx
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; CHECK: $edx = COPY killed renamable $ebp
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; CHECK: $rcx = COPY killed renamable $rax
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; CHECK: $r8d = MOV32r0 implicit-def dead $eflags
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; CHECK: MOV64mr %stack.3, 1, $noreg, 0, $noreg, killed $r14 :: (store 8 into %stack.3)
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; CHECK: STATEPOINT 2, 5, 5, undef renamable $rax, undef $rdi, $esi, $edx, $rcx, killed $r8d, 2, 0, 2, 0, 2, 7, undef renamable $rax, 1, 8, %stack.0, 0, 1, 8, %stack.1, 0, 1, 8, %stack.2, 0, renamable $ebx, undef renamable $eax, 2, 6, 2, 2, 1, 8, %stack.3, 0, undef renamable $rbx, 2, 0, 2, 2, 0, 0, 1, 1, csr_64, implicit-def $rsp, implicit-def $ssp, implicit killed $rbx :: (volatile load store 8 on %stack.0), (volatile load store 8 on %stack.1), (volatile load store 8 on %stack.2), (load store 8 on %stack.3)
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; CHECK: $r14 = MOV64rm %stack.3, 1, $noreg, 0, $noreg :: (load 8 from %stack.3)
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; CHECK: ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK: RET 0
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bb.0.bb:
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successors: %bb.1(0x80000000)
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liveins: $rcx, $rdi, $rdx, $rsi
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renamable $r15 = COPY $rcx
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renamable $r12 = COPY $rdx
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renamable $r14 = COPY $rsi
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renamable $r13 = COPY $rdi
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renamable $ebx = MOV32rm undef renamable $rax, 1, $noreg, 0, $noreg, implicit-def $rbx :: (load unordered 4 from `i32 addrspace(1)* undef`, align 8, addrspace 1)
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bb.1.bb7:
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liveins: $rbx, $r12, $r13, $r14, $r15
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renamable $ebp = LEA64_32r renamable $rbx, 1, $noreg, 6, $noreg
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ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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CALL64pcrel32 target-flags(x86-plt) @wombat, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
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ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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MOV64mr %stack.0, 1, $noreg, 0, $noreg, killed renamable $r13 :: (store 8 into %stack.0)
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MOV64mr %stack.1, 1, $noreg, 0, $noreg, killed renamable $r12 :: (store 8 into %stack.1)
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MOV64mr %stack.2, 1, $noreg, 0, $noreg, killed renamable $r15 :: (store 8 into %stack.2)
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ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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$esi = COPY renamable $ebx
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$edx = COPY killed renamable $ebp
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$rcx = COPY killed renamable $rax
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$r8d = MOV32r0 implicit-def dead $eflags
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dead renamable $r14, dead renamable $rbx = STATEPOINT 2, 5, 5, undef renamable $rax, undef $rdi, $esi, $edx, $rcx, killed $r8d, 2, 0, 2, 0, 2, 7, undef renamable $rax, 1, 8, %stack.0, 0, 1, 8, %stack.1, 0, 1, 8, %stack.2, 0, renamable $ebx, undef renamable $eax, 2, 6, 2, 2, killed renamable $r14(tied-def 0), undef renamable $rbx(tied-def 1), 2, 0, 2, 2, 0, 0, 1, 1, csr_64, implicit-def $rsp, implicit-def $ssp, implicit killed $rbx :: (volatile load store 8 on %stack.0), (volatile load store 8 on %stack.1), (volatile load store 8 on %stack.2)
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ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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RET 0
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...
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