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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc %s -verify-machineinstrs -mtriple aarch64-apple-darwin -global-isel -o - 2>&1 | FileCheck %s
; There are two things we want to test here:
; (1) We can tail call musttail calls.
; (2) We spill and reload all of the arguments around a normal call.
declare i32 @musttail_variadic_callee(i32, ...)
define i32 @test_musttail_variadic(i32 %arg0, ...) {
; CHECK-LABEL: test_musttail_variadic:
; CHECK: ; %bb.0:
; CHECK-NEXT: b _musttail_variadic_callee
%r = musttail call i32 (i32, ...) @musttail_variadic_callee(i32 %arg0, ...)
ret i32 %r
}
declare [2 x i64] @musttail_variadic_aggret_callee(i32 %arg0, ...)
define [2 x i64] @test_musttail_variadic_aggret(i32 %arg0, ...) {
; CHECK-LABEL: test_musttail_variadic_aggret:
; CHECK: ; %bb.0:
; CHECK-NEXT: b _musttail_variadic_aggret_callee
%r = musttail call [2 x i64] (i32, ...) @musttail_variadic_aggret_callee(i32 %arg0, ...)
ret [2 x i64] %r
}
; Test musttailing with a normal call in the block. Test that we spill and
; restore, as a normal call will clobber all argument registers.
@asdf = internal constant [4 x i8] c"asdf"
declare void @puts(i8*)
define i32 @test_musttail_variadic_spill(i32 %arg0, ...) {
; CHECK-LABEL: test_musttail_variadic_spill:
; CHECK: ; %bb.0:
; CHECK-NEXT: sub sp, sp, #224
; CHECK-NEXT: .cfi_def_cfa_offset 224
; CHECK-NEXT: stp x28, x27, [sp, #128] ; 16-byte Folded Spill
; CHECK-NEXT: stp x26, x25, [sp, #144] ; 16-byte Folded Spill
; CHECK-NEXT: stp x24, x23, [sp, #160] ; 16-byte Folded Spill
; CHECK-NEXT: stp x22, x21, [sp, #176] ; 16-byte Folded Spill
; CHECK-NEXT: stp x20, x19, [sp, #192] ; 16-byte Folded Spill
; CHECK-NEXT: stp x29, x30, [sp, #208] ; 16-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -8
; CHECK-NEXT: .cfi_offset w29, -16
; CHECK-NEXT: .cfi_offset w19, -24
; CHECK-NEXT: .cfi_offset w20, -32
; CHECK-NEXT: .cfi_offset w21, -40
; CHECK-NEXT: .cfi_offset w22, -48
; CHECK-NEXT: .cfi_offset w23, -56
; CHECK-NEXT: .cfi_offset w24, -64
; CHECK-NEXT: .cfi_offset w25, -72
; CHECK-NEXT: .cfi_offset w26, -80
; CHECK-NEXT: .cfi_offset w27, -88
; CHECK-NEXT: .cfi_offset w28, -96
; CHECK-NEXT: mov w19, w0
; CHECK-NEXT: Lloh0:
; CHECK-NEXT: adrp x0, _asdf@PAGE
; CHECK-NEXT: Lloh1:
; CHECK-NEXT: add x0, x0, _asdf@PAGEOFF
; CHECK-NEXT: mov x20, x1
; CHECK-NEXT: mov x21, x2
; CHECK-NEXT: mov x22, x3
; CHECK-NEXT: mov x23, x4
; CHECK-NEXT: mov x24, x5
; CHECK-NEXT: mov x25, x6
; CHECK-NEXT: mov x26, x7
; CHECK-NEXT: stp q7, q6, [sp] ; 32-byte Folded Spill
; CHECK-NEXT: mov x27, x8
; CHECK-NEXT: stp q5, q4, [sp, #32] ; 32-byte Folded Spill
; CHECK-NEXT: stp q3, q2, [sp, #64] ; 32-byte Folded Spill
; CHECK-NEXT: stp q1, q0, [sp, #96] ; 32-byte Folded Spill
; CHECK-NEXT: bl _puts
; CHECK-NEXT: ldp q1, q0, [sp, #96] ; 32-byte Folded Reload
; CHECK-NEXT: mov w0, w19
; CHECK-NEXT: mov x1, x20
; CHECK-NEXT: mov x2, x21
; CHECK-NEXT: mov x3, x22
; CHECK-NEXT: mov x4, x23
; CHECK-NEXT: mov x5, x24
; CHECK-NEXT: mov x6, x25
; CHECK-NEXT: mov x7, x26
; CHECK-NEXT: mov x8, x27
; CHECK-NEXT: ldp q3, q2, [sp, #64] ; 32-byte Folded Reload
; CHECK-NEXT: ldp q5, q4, [sp, #32] ; 32-byte Folded Reload
; CHECK-NEXT: ldp q7, q6, [sp] ; 32-byte Folded Reload
; CHECK-NEXT: ldp x29, x30, [sp, #208] ; 16-byte Folded Reload
; CHECK-NEXT: ldp x20, x19, [sp, #192] ; 16-byte Folded Reload
; CHECK-NEXT: ldp x22, x21, [sp, #176] ; 16-byte Folded Reload
; CHECK-NEXT: ldp x24, x23, [sp, #160] ; 16-byte Folded Reload
; CHECK-NEXT: ldp x26, x25, [sp, #144] ; 16-byte Folded Reload
; CHECK-NEXT: ldp x28, x27, [sp, #128] ; 16-byte Folded Reload
; CHECK-NEXT: add sp, sp, #224
; CHECK-NEXT: b _musttail_variadic_callee
; CHECK-NEXT: .loh AdrpAdd Lloh0, Lloh1
call void @puts(i8* getelementptr ([4 x i8], [4 x i8]* @asdf, i32 0, i32 0))
%r = musttail call i32 (i32, ...) @musttail_variadic_callee(i32 %arg0, ...)
ret i32 %r
}
; Test musttailing with a varargs call in the block. Test that we spill and
; reload all arguments in the variadic argument pack.
declare void @llvm.va_start(i8*) nounwind
declare void(i8*, ...)* @get_f(i8* %this)
define void @f_thunk(i8* %this, ...) {
; CHECK-LABEL: f_thunk:
; CHECK: ; %bb.0:
; CHECK-NEXT: sub sp, sp, #256
; CHECK-NEXT: .cfi_def_cfa_offset 256
; CHECK-NEXT: stp x28, x27, [sp, #160] ; 16-byte Folded Spill
; CHECK-NEXT: stp x26, x25, [sp, #176] ; 16-byte Folded Spill
; CHECK-NEXT: stp x24, x23, [sp, #192] ; 16-byte Folded Spill
; CHECK-NEXT: stp x22, x21, [sp, #208] ; 16-byte Folded Spill
; CHECK-NEXT: stp x20, x19, [sp, #224] ; 16-byte Folded Spill
; CHECK-NEXT: stp x29, x30, [sp, #240] ; 16-byte Folded Spill
; CHECK-NEXT: .cfi_offset w30, -8
; CHECK-NEXT: .cfi_offset w29, -16
; CHECK-NEXT: .cfi_offset w19, -24
; CHECK-NEXT: .cfi_offset w20, -32
; CHECK-NEXT: .cfi_offset w21, -40
; CHECK-NEXT: .cfi_offset w22, -48
; CHECK-NEXT: .cfi_offset w23, -56
; CHECK-NEXT: .cfi_offset w24, -64
; CHECK-NEXT: .cfi_offset w25, -72
; CHECK-NEXT: .cfi_offset w26, -80
; CHECK-NEXT: .cfi_offset w27, -88
; CHECK-NEXT: .cfi_offset w28, -96
; CHECK-NEXT: add x9, sp, #128
; CHECK-NEXT: add x10, sp, #256
; CHECK-NEXT: mov x19, x0
; CHECK-NEXT: mov x20, x1
; CHECK-NEXT: mov x21, x2
; CHECK-NEXT: mov x22, x3
; CHECK-NEXT: mov x23, x4
; CHECK-NEXT: mov x24, x5
; CHECK-NEXT: mov x25, x6
; CHECK-NEXT: mov x26, x7
; CHECK-NEXT: stp q7, q6, [sp] ; 32-byte Folded Spill
; CHECK-NEXT: mov x27, x8
; CHECK-NEXT: stp q5, q4, [sp, #32] ; 32-byte Folded Spill
; CHECK-NEXT: stp q3, q2, [sp, #64] ; 32-byte Folded Spill
; CHECK-NEXT: stp q1, q0, [sp, #96] ; 32-byte Folded Spill
; CHECK-NEXT: str x10, [x9]
; CHECK-NEXT: bl _get_f
; CHECK-NEXT: ldp q1, q0, [sp, #96] ; 32-byte Folded Reload
; CHECK-NEXT: mov x9, x0
; CHECK-NEXT: mov x0, x19
; CHECK-NEXT: mov x1, x20
; CHECK-NEXT: mov x2, x21
; CHECK-NEXT: mov x3, x22
; CHECK-NEXT: mov x4, x23
; CHECK-NEXT: mov x5, x24
; CHECK-NEXT: mov x6, x25
; CHECK-NEXT: mov x7, x26
; CHECK-NEXT: mov x8, x27
; CHECK-NEXT: ldp q3, q2, [sp, #64] ; 32-byte Folded Reload
; CHECK-NEXT: ldp q5, q4, [sp, #32] ; 32-byte Folded Reload
; CHECK-NEXT: ldp q7, q6, [sp] ; 32-byte Folded Reload
; CHECK-NEXT: ldp x29, x30, [sp, #240] ; 16-byte Folded Reload
; CHECK-NEXT: ldp x20, x19, [sp, #224] ; 16-byte Folded Reload
; CHECK-NEXT: ldp x22, x21, [sp, #208] ; 16-byte Folded Reload
; CHECK-NEXT: ldp x24, x23, [sp, #192] ; 16-byte Folded Reload
; CHECK-NEXT: ldp x26, x25, [sp, #176] ; 16-byte Folded Reload
; CHECK-NEXT: ldp x28, x27, [sp, #160] ; 16-byte Folded Reload
; CHECK-NEXT: add sp, sp, #256
; CHECK-NEXT: br x9
%ap = alloca [4 x i8*], align 16
%ap_i8 = bitcast [4 x i8*]* %ap to i8*
call void @llvm.va_start(i8* %ap_i8)
%fptr = call void(i8*, ...)*(i8*) @get_f(i8* %this)
musttail call void (i8*, ...) %fptr(i8* %this, ...)
ret void
}
; We don't need any spills and reloads here, but we should still emit the
; copies in call lowering.
define void @g_thunk(i8* %fptr_i8, ...) {
; CHECK-LABEL: g_thunk:
; CHECK: ; %bb.0:
; CHECK-NEXT: br x0
%fptr = bitcast i8* %fptr_i8 to void (i8*, ...)*
musttail call void (i8*, ...) %fptr(i8* %fptr_i8, ...)
ret void
}
; Test that this works with multiple exits and basic blocks.
%struct.Foo = type { i1, i8*, i8* }
@g = external global i32
define void @h_thunk(%struct.Foo* %this, ...) {
; CHECK-LABEL: h_thunk:
; CHECK: ; %bb.0:
; CHECK-NEXT: ldrb w9, [x0]
; CHECK-NEXT: tbz w9, #0, LBB5_2
; CHECK-NEXT: ; %bb.1: ; %then
; CHECK-NEXT: ldr x9, [x0, #8]
; CHECK-NEXT: br x9
; CHECK-NEXT: LBB5_2: ; %else
; CHECK-NEXT: Lloh2:
; CHECK-NEXT: adrp x10, _g@GOTPAGE
; CHECK-NEXT: ldr x9, [x0, #16]
; CHECK-NEXT: mov w11, #42
; CHECK-NEXT: Lloh3:
; CHECK-NEXT: ldr x10, [x10, _g@GOTPAGEOFF]
; CHECK-NEXT: Lloh4:
; CHECK-NEXT: str w11, [x10]
; CHECK-NEXT: br x9
; CHECK-NEXT: .loh AdrpLdrGotStr Lloh2, Lloh3, Lloh4
%cond_p = getelementptr %struct.Foo, %struct.Foo* %this, i32 0, i32 0
%cond = load i1, i1* %cond_p
br i1 %cond, label %then, label %else
then:
%a_p = getelementptr %struct.Foo, %struct.Foo* %this, i32 0, i32 1
%a_i8 = load i8*, i8** %a_p
%a = bitcast i8* %a_i8 to void (%struct.Foo*, ...)*
musttail call void (%struct.Foo*, ...) %a(%struct.Foo* %this, ...)
ret void
else:
%b_p = getelementptr %struct.Foo, %struct.Foo* %this, i32 0, i32 2
%b_i8 = load i8*, i8** %b_p
%b = bitcast i8* %b_i8 to void (%struct.Foo*, ...)*
store i32 42, i32* @g
musttail call void (%struct.Foo*, ...) %b(%struct.Foo* %this, ...)
ret void
}
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