121 lines
5.2 KiB
LLVM
121 lines
5.2 KiB
LLVM
; RUN: llc -O3 < %s | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.11.0"
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declare void @bar() #0
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declare void @baz()
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define void @test1(i32 %a) gc "statepoint-example" {
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entry:
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; We expect the argument to be passed in an extra register to bar
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; CHECK-LABEL: test1
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; CHECK: pushq %rax
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; CHECK-NEXT: Lcfi0:
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: callq _bar
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%statepoint_token1 = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @bar, i32 0, i32 2, i32 0, i32 1, i32 %a)
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ret void
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}
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define void @test2(i32 %a, i32 %b) gc "statepoint-example" {
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entry:
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; Because the first call clobbers esi, we have to move the values into
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; new registers. Note that they stay in the registers for both calls.
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; CHECK-LABEL: @test2
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; CHECK: movl %esi, %ebx
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; CHECK-NEXT: movl %edi, %ebp
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; CHECK-NEXT: callq _bar
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call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @bar, i32 0, i32 2, i32 0, i32 2, i32 %a, i32 %b)
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call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @bar, i32 0, i32 2, i32 0, i32 2, i32 %b, i32 %a)
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ret void
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}
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define void @test3(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 %i) gc "statepoint-example" {
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entry:
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; TODO: We should have folded the reload into the statepoint.
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; CHECK-LABEL: @test3
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; CHECK: pushq %rax
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; CHECK-NEXT: Lcfi
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: callq _bar
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%statepoint_token1 = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @bar, i32 0, i32 2, i32 0, i32 9, i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 %i)
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ret void
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}
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; This case just confirms that we don't crash when given more live values
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; than registers. This is a case where we *have* to use a stack slot. This
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; also ends up being a good test of whether we can fold loads from immutable
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; stack slots into the statepoint.
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define void @test4(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 %i, i32 %j, i32 %k, i32 %l, i32 %m, i32 %n, i32 %o, i32 %p, i32 %q, i32 %r, i32 %s, i32 %t, i32 %u, i32 %v, i32 %w, i32 %x, i32 %y, i32 %z) gc "statepoint-example" {
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entry:
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; CHECK-LABEL: test4
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; CHECK: pushq %rax
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; CHECK-NEXT: Lcfi
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: callq _bar
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%statepoint_token1 = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @bar, i32 0, i32 2, i32 0, i32 26, i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 %i, i32 %j, i32 %k, i32 %l, i32 %m, i32 %n, i32 %o, i32 %p, i32 %q, i32 %r, i32 %s, i32 %t, i32 %u, i32 %v, i32 %w, i32 %x, i32 %y, i32 %z)
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ret void
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}
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; A live-through gc-value must be spilled even if it is also a live-in deopt
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; value. For live-in, we could technically report the register copy, but from
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; a code quality perspective it's better to reuse the required stack slot so
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; as to put less stress on the register allocator for no benefit.
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define i32 addrspace(1)* @test5(i32 %a, i32 addrspace(1)* %p) gc "statepoint-example" {
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entry:
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; CHECK-LABEL: test5
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; CHECK: movq %rsi, (%rsp)
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; CHECK-NEXT: callq _bar
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%token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @bar, i32 0, i32 2, i32 0, i32 1, i32 %a, i32 addrspace(1)* %p, i32 addrspace(1)* %p)
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%p2 = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(token %token, i32 9, i32 9)
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ret i32 addrspace(1)* %p2
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}
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; Show the interaction of live-through spilling followed by live-in.
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define void @test6(i32 %a) gc "statepoint-example" {
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entry:
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; TODO: We could have reused the previous spill slot at zero additional cost.
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; CHECK-LABEL: test6
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; CHECK: movl %edi, %ebx
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; CHECK: movl %ebx, 12(%rsp)
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; CHECK-NEXT: callq _baz
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; CHECK-NEXT: Ltmp
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; CHECK-NEXT: callq _bar
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call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @baz, i32 0, i32 0, i32 0, i32 1, i32 %a)
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call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @bar, i32 0, i32 2, i32 0, i32 1, i32 %a)
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ret void
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}
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; CHECK: Ltmp0-_test1
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; CHECK: .byte 1
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; CHECK-NEXT: .byte 4
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; CHECK-NEXT: .short 5
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; CHECK-NEXT: .long 0
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; CHECK: Ltmp1-_test2
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; CHECK: .byte 1
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; CHECK-NEXT: .byte 4
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; CHECK-NEXT: .short 6
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; CHECK-NEXT: .long 0
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; CHECK: .byte 1
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; CHECK-NEXT: .byte 4
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; CHECK-NEXT: .short 3
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; CHECK-NEXT: .long 0
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; CHECK: Ltmp2-_test2
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; CHECK: .byte 1
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; CHECK-NEXT: .byte 4
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; CHECK-NEXT: .short 3
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; CHECK-NEXT: .long 0
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; CHECK: .byte 1
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; CHECK-NEXT: .byte 4
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; CHECK-NEXT: .short 6
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; CHECK-NEXT: .long 0
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declare token @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
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declare i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(token, i32, i32)
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attributes #0 = { "deopt-lowering"="live-in" }
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attributes #1 = { "deopt-lowering"="live-through" }
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