derek.holloway
7502bf64a4
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78 lines
3.7 KiB
LLVM
78 lines
3.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -verify-machineinstrs < %s | FileCheck %s
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; Check that we can export values of "duplicated" gc.relocates without a crash
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; "duplicate" here means maps to same SDValue. We previously had an
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; optimization which tried to reduce number of spills/stackmap entries in such
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; cases, but it incorrectly handled exports across basis block boundaries
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; leading to a crash in this case.
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target triple = "x86_64-pc-linux-gnu"
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declare void @func()
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define i1 @test() gc "statepoint-example" {
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; CHECK-LABEL: test:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pushq %rax
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: callq func@PLT
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; CHECK-NEXT: .Ltmp0:
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; CHECK-NEXT: callq func@PLT
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; CHECK-NEXT: .Ltmp1:
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; CHECK-NEXT: movb $1, %al
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; CHECK-NEXT: popq %rcx
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; CHECK-NEXT: .cfi_def_cfa_offset 8
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; CHECK-NEXT: retq
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entry:
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%safepoint_token = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr elementtype(void ()) @func, i32 0, i32 0, i32 0, i32 0) ["gc-live" (ptr addrspace(1) null, ptr addrspace(1) null)]
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%base = call ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token %safepoint_token, i32 0, i32 0)
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%derived = call ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token %safepoint_token, i32 0, i32 1)
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%safepoint_token2 = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr elementtype(void ()) @func, i32 0, i32 0, i32 0, i32 0) ["gc-live" (ptr addrspace(1) %base, ptr addrspace(1) %derived)]
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br label %next
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next:
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%base_reloc = call ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token %safepoint_token2, i32 0, i32 0)
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%derived_reloc = call ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token %safepoint_token2, i32 0, i32 1)
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%cmp1 = icmp eq ptr addrspace(1) %base_reloc, null
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%cmp2 = icmp eq ptr addrspace(1) %derived_reloc, null
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%cmp = and i1 %cmp1, %cmp2
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ret i1 %cmp
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}
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; Showing redundant fill on first statepoint and spill/fill on second one
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define i1 @test2(ptr addrspace(1) %arg) gc "statepoint-example" {
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; CHECK-LABEL: test2:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pushq %rax
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: movq %rdi, (%rsp)
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; CHECK-NEXT: callq func@PLT
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; CHECK-NEXT: .Ltmp2:
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; CHECK-NEXT: callq func@PLT
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; CHECK-NEXT: .Ltmp3:
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; CHECK-NEXT: cmpq $0, (%rsp)
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; CHECK-NEXT: sete %al
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; CHECK-NEXT: popq %rcx
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; CHECK-NEXT: .cfi_def_cfa_offset 8
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; CHECK-NEXT: retq
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entry:
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%safepoint_token = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr elementtype(void ()) @func, i32 0, i32 0, i32 0, i32 0) ["gc-live" (ptr addrspace(1) %arg, ptr addrspace(1) %arg)]
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%base = call ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token %safepoint_token, i32 0, i32 0)
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%derived = call ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token %safepoint_token, i32 0, i32 1)
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%safepoint_token2 = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr elementtype(void ()) @func, i32 0, i32 0, i32 0, i32 0) ["gc-live" (ptr addrspace(1) %base, ptr addrspace(1) %derived)]
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br label %next
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next:
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%base_reloc = call ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token %safepoint_token2, i32 0, i32 0)
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%derived_reloc = call ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token %safepoint_token2, i32 0, i32 1)
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%cmp1 = icmp eq ptr addrspace(1) %base_reloc, null
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%cmp2 = icmp eq ptr addrspace(1) %derived_reloc, null
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%cmp = and i1 %cmp1, %cmp2
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ret i1 %cmp
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}
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declare token @llvm.experimental.gc.statepoint.p0(i64, i32, ptr, i32, i32, ...)
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declare ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token, i32, i32)
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