d71999ef1b
Summary: This patch changes gc.statepoint intrinsic's return type to token type instead of i32 type. Using token types could prevent LLVM to merge different gc.statepoint nodes into PHI nodes and cause further problems with gc relocations. The patch also changes the way on how gc.relocate and gc.result look for their corresponding gc.statepoint on unwind path. The current implementation uses the selector value extracted from a { i8*, i32 } landingpad as a hook to find the gc.statepoint, while the patch directly uses a token type landingpad (http://reviews.llvm.org/D15405) to find the gc.statepoint.
Reviewers: sanjoy, JosephTremoulet, pgavlin, igor-laevsky, mjacob
Subscribers: reames, mjacob, sanjoy, llvm-commits
Differential Revision: http://reviews.llvm.org/D15662
llvm-svn: 256443
131 lines
3.2 KiB
LLVM
131 lines
3.2 KiB
LLVM
; RUN: llc < %s | FileCheck %s
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; Check that we can lower a use of an alloca both as a deopt value (where the
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; exact meaning is up to the consumer of the stackmap) and as an explicit spill
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; slot used for GC.
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target datalayout = "e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-linux-gnu"
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declare zeroext i1 @return_i1()
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; Can we handle an explicit relocation slot (in the form of an alloca) given
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; to the statepoint?
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define i32 addrspace(1)* @test(i32 addrspace(1)* %ptr) gc "statepoint-example" {
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; CHECK-LABEL: test
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; CHECK: pushq %rax
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; CHECK: movq %rdi, (%rsp)
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; CHECK: callq return_i1
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; CHECK: movq (%rsp), %rax
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; CHECK: popq %rcx
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; CHECK: retq
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entry:
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%alloca = alloca i32 addrspace(1)*, align 8
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store i32 addrspace(1)* %ptr, i32 addrspace(1)** %alloca
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call token (i64, i32, i1 ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_i1f(i64 0, i32 0, i1 ()* @return_i1, i32 0, i32 0, i32 0, i32 0, i32 addrspace(1)** %alloca)
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%rel = load i32 addrspace(1)*, i32 addrspace(1)** %alloca
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ret i32 addrspace(1)* %rel
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}
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; Can we handle an alloca as a deopt value?
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define i32 addrspace(1)* @test2(i32 addrspace(1)* %ptr) gc "statepoint-example" {
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; CHECK-LABEL: test2
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; CHECK: pushq %rax
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; CHECK: movq %rdi, (%rsp)
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; CHECK: callq return_i1
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; CHECK: xorl %eax, %eax
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; CHECK: popq %rcx
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; CHECK: retq
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entry:
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%alloca = alloca i32 addrspace(1)*, align 8
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store i32 addrspace(1)* %ptr, i32 addrspace(1)** %alloca
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call token (i64, i32, i1 ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_i1f(i64 0, i32 0, i1 ()* @return_i1, i32 0, i32 0, i32 0, i32 1, i32 addrspace(1)** %alloca)
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ret i32 addrspace(1)* null
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}
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declare token @llvm.experimental.gc.statepoint.p0f_i1f(i64, i32, i1 ()*, i32, i32, ...)
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; CHECK-LABEL: .section .llvm_stackmaps
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; CHECK-NEXT: __LLVM_StackMaps:
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; Header
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; CHECK-NEXT: .byte 1
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; CHECK-NEXT: .byte 0
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; CHECK-NEXT: .short 0
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; Num Functions
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; CHECK-NEXT: .long 2
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; Num LargeConstants
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; CHECK-NEXT: .long 0
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; Num Callsites
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; CHECK-NEXT: .long 2
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; Functions and stack size
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; CHECK-NEXT: .quad test
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; CHECK-NEXT: .quad 8
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; CHECK-NEXT: .quad test2
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; CHECK-NEXT: .quad 8
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; Large Constants
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; Statepoint ID only
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; CHECK: .quad 0
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; Callsites
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; The GC one
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; CHECK: .long .Ltmp1-test
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; CHECK: .short 0
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; CHECK: .short 4
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; SmallConstant (0)
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; CHECK: .byte 4
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; CHECK: .byte 8
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; CHECK: .short 0
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; CHECK: .long 0
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; SmallConstant (0)
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; CHECK: .byte 4
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; CHECK: .byte 8
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; CHECK: .short 0
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; CHECK: .long 0
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; SmallConstant (0)
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; CHECK: .byte 4
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; CHECK: .byte 8
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; CHECK: .short 0
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; CHECK: .long 0
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; Direct Spill Slot [RSP+0]
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; CHECK: .byte 2
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; CHECK: .byte 8
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; CHECK: .short 7
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; CHECK: .long 0
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; No Padding or LiveOuts
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; CHECK: .short 0
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; CHECK: .short 0
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; CHECK: .align 8
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; The Deopt one
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; CHECK: .long .Ltmp3-test2
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; CHECK: .short 0
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; CHECK: .short 4
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; SmallConstant (0)
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; CHECK: .byte 4
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; CHECK: .byte 8
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; CHECK: .short 0
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; CHECK: .long 0
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; SmallConstant (0)
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; CHECK: .byte 4
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; CHECK: .byte 8
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; CHECK: .short 0
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; CHECK: .long 0
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; SmallConstant (1)
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; CHECK: .byte 4
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; CHECK: .byte 8
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; CHECK: .short 0
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; CHECK: .long 1
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; Direct Spill Slot [RSP+0]
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; CHECK: .byte 2
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; CHECK: .byte 8
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; CHECK: .short 7
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; CHECK: .long 0
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; No Padding or LiveOuts
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; CHECK: .short 0
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; CHECK: .short 0
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; CHECK: .align 8
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