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c909de5624
Choosing a "cfi" name makes the intend a bit clearer in an assembly dump and more importantly the assembly dumps are slightly more stable as the numbers don't move around anymore when unrelated code calls createTempSymbol() more or less often. As they are temp labels the name doesn't influence the generated object code. Differential Revision: https://reviews.llvm.org/D27244 llvm-svn: 288290
132 lines
5.5 KiB
LLVM
132 lines
5.5 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: movl 32(%rsp), %r10d
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; CHECK-NEXT: movl 24(%rsp), %r11d
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; CHECK-NEXT: movl 16(%rsp), %eax
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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.
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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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; TODO: We should have folded the reload into the statepoint.
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; CHECK-LABEL: test4
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; CHECK: pushq %r15
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; CHECK: pushq %r14
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; CHECK: pushq %r13
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; CHECK: pushq %r12
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; CHECK: pushq %rbx
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; CHECK: pushq %rax
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; CHECK: movl 128(%rsp), %r13d
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; CHECK-NEXT: movl 120(%rsp), %r12d
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; CHECK-NEXT: movl 112(%rsp), %r15d
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; CHECK-NEXT: movl 104(%rsp), %r14d
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; CHECK-NEXT: movl 96(%rsp), %ebp
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; CHECK-NEXT: movl 88(%rsp), %ebx
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; CHECK-NEXT: movl 80(%rsp), %r11d
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; CHECK-NEXT: movl 72(%rsp), %r10d
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; CHECK-NEXT: movl 64(%rsp), %eax
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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: Ltmp6:
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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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