statepoint-duplicates-export.ll
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -verify-machineinstrs < %s | FileCheck %s
; Check that we can export values of "duplicated" gc.relocates without a crash
; "duplicate" here means maps to same SDValue. We previously had an
; optimization which tried to reduce number of spills/stackmap entries in such
; cases, but it incorrectly handled exports across basis block boundaries
; leading to a crash in this case.
target triple = "x86_64-pc-linux-gnu"
declare void @func()
define i1 @test() gc "statepoint-example" {
; CHECK-LABEL: test:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: callq func
; CHECK-NEXT: .Ltmp0:
; CHECK-NEXT: callq func
; CHECK-NEXT: .Ltmp1:
; CHECK-NEXT: movb $1, %al
; CHECK-NEXT: popq %rcx
; CHECK-NEXT: .cfi_def_cfa_offset 8
; CHECK-NEXT: retq
entry:
%safepoint_token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @func, i32 0, i32 0, i32 0, i32 0) ["gc-live" (i32 addrspace(1)* null, i32 addrspace(1)* null)]
%base = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(token %safepoint_token, i32 0, i32 0)
%derived = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(token %safepoint_token, i32 0, i32 1)
%safepoint_token2 = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @func, i32 0, i32 0, i32 0, i32 0) ["gc-live" (i32 addrspace(1)* %base, i32 addrspace(1)* %derived)]
br label %next
next:
%base_reloc = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(token %safepoint_token2, i32 0, i32 0)
%derived_reloc = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(token %safepoint_token2, i32 0, i32 1)
%cmp1 = icmp eq i32 addrspace(1)* %base_reloc, null
%cmp2 = icmp eq i32 addrspace(1)* %derived_reloc, null
%cmp = and i1 %cmp1, %cmp2
ret i1 %cmp
}
; Showing redundant fill on first statepoint and spill/fill on second one
define i1 @test2(i32 addrspace(1)* %arg) gc "statepoint-example" {
; CHECK-LABEL: test2:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: movq %rdi, (%rsp)
; CHECK-NEXT: callq func
; CHECK-NEXT: .Ltmp2:
; CHECK-NEXT: callq func
; CHECK-NEXT: .Ltmp3:
; CHECK-NEXT: cmpq $0, (%rsp)
; CHECK-NEXT: sete %al
; CHECK-NEXT: popq %rcx
; CHECK-NEXT: .cfi_def_cfa_offset 8
; CHECK-NEXT: retq
entry:
%safepoint_token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @func, i32 0, i32 0, i32 0, i32 0) ["gc-live" (i32 addrspace(1)* %arg, i32 addrspace(1)* %arg)]
%base = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(token %safepoint_token, i32 0, i32 0)
%derived = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(token %safepoint_token, i32 0, i32 1)
%safepoint_token2 = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @func, i32 0, i32 0, i32 0, i32 0) ["gc-live" (i32 addrspace(1)* %base, i32 addrspace(1)* %derived)]
br label %next
next:
%base_reloc = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(token %safepoint_token2, i32 0, i32 0)
%derived_reloc = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(token %safepoint_token2, i32 0, i32 1)
%cmp1 = icmp eq i32 addrspace(1)* %base_reloc, null
%cmp2 = icmp eq i32 addrspace(1)* %derived_reloc, null
%cmp = and i1 %cmp1, %cmp2
ret i1 %cmp
}
declare token @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
declare i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(token, i32, i32)