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[Tests] Fill out a few tests around gc relocation uniquing 

llvm-svn: 353773
This commit is contained in:
Philip Reames 2019-02-12 00:01:39 +00:00
parent 1eb19e5277
commit 8663b00ce1
1 changed files with 36 additions and 3 deletions
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39
llvm/test/CodeGen/X86/statepoint-uniqueing.ll
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@ -1,9 +1,6 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -verify-machineinstrs < %s | FileCheck %s
; Checks for a crash we had when two gc.relocate calls would
; relocating identical values
target datalayout = "e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-linux-gnu"
@ -13,6 +10,7 @@ declare token @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i
declare i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(token, i32, i32) #3
declare i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token, i32, i32) #3
;; Two gc.relocates of the same input, should require only a single spill/fill
define void @test_gcrelocate_uniqueing(i32 addrspace(1)* %ptr) gc "statepoint-example" {
; CHECK-LABEL: test_gcrelocate_uniqueing:
; CHECK: # %bb.0:
@ -36,6 +34,7 @@ define void @test_gcrelocate_uniqueing(i32 addrspace(1)* %ptr) gc "statepoint-ex
ret void
}
;; Two gc.relocates of a bitcasted pointer should only require a single spill/fill
define void @test_gcptr_uniqueing(i32 addrspace(1)* %ptr) gc "statepoint-example" {
; CHECK-LABEL: test_gcptr_uniqueing:
; CHECK: # %bb.0:
@ -59,3 +58,37 @@ define void @test_gcptr_uniqueing(i32 addrspace(1)* %ptr) gc "statepoint-example
call void (...) @use(i32 addrspace(1)* %a, i8 addrspace(1)* %b)
ret void
}
;; A GC value is not dead, and does need to be spill (but not filed) if
;; that same value is also in the deopt list.
define void @test_deopt_use(i32 addrspace(1)* %ptr) gc "statepoint-example" {
; CHECK-LABEL: test_deopt_use:
; CHECK: # %bb.0:
; CHECK-NEXT: subq $24, %rsp
; CHECK-NEXT: .cfi_def_cfa_offset 32
; CHECK-NEXT: movq %rdi, {{[0-9]+}}(%rsp)
; CHECK-NEXT: callq f
; CHECK-NEXT: .Ltmp2:
; CHECK-NEXT: addq $24, %rsp
; CHECK-NEXT: .cfi_def_cfa_offset 8
; CHECK-NEXT: retq
tail call token (i64, i32, void ()*, i32, i32, ...)
@llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @f, i32 0, i32 0, i32 0, i32 2, i32 addrspace(1)* %ptr, i32 undef, i32 addrspace(1)* %ptr)
ret void
}
;; A GC value which is truely unused does not need to spilled or filled.
define void @test_dse(i32 addrspace(1)* %ptr) gc "statepoint-example" {
; CHECK-LABEL: test_dse:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: callq f
; CHECK-NEXT: .Ltmp3:
; CHECK-NEXT: popq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 8
; CHECK-NEXT: retq
tail call token (i64, i32, void ()*, i32, i32, ...)
@llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @f, i32 0, i32 0, i32 0, i32 2, i32 undef, i32 undef, i32 addrspace(1)* %ptr)
ret void
}