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fastcc.ll
243 lines (180 loc) · 6.32 KB
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fastcc.ll
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; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -disable-fp-elim -tailcallopt | FileCheck %s -check-prefix CHECK-TAIL
; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -disable-fp-elim | FileCheck %s
; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -disable-fp-elim -tailcallopt -aarch64-redzone | FileCheck %s -check-prefix CHECK-TAIL-RZ
; Without tailcallopt fastcc still means the caller cleans up the
; stack, so try to make sure this is respected.
define fastcc void @func_stack0() {
; CHECK-LABEL: func_stack0:
; CHECK: sub sp, sp, #48
; CHECK: add x29, sp, #32
; CHECK: str w{{[0-9]+}}, [sp]
; CHECK-TAIL-LABEL: func_stack0:
; CHECK-TAIL: sub sp, sp, #48
; CHECK-TAIL-NEXT: stp x29, x30, [sp, #32]
; CHECK-TAIL-NEXT: add x29, sp, #32
; CHECK-TAIL: str w{{[0-9]+}}, [sp]
call fastcc void @func_stack8([8 x i32] undef, i32 42)
; CHECK: bl func_stack8
; CHECK-NOT: sub sp, sp,
; CHECK-NOT: [sp, #{{[-0-9]+}}]!
; CHECK-NOT: [sp], #{{[-0-9]+}}
; CHECK-TAIL: bl func_stack8
; CHECK-TAIL: stp xzr, xzr, [sp, #-16]!
call fastcc void @func_stack32([8 x i32] undef, i128 0, i128 9)
; CHECK: bl func_stack32
; CHECK-NOT: sub sp, sp,
; CHECK-TAIL: bl func_stack32
; CHECK-TAIL: sub sp, sp, #32
call fastcc void @func_stack0()
; CHECK: bl func_stack0
; CHECK-NOT: sub sp, sp
; CHECK-TAIL: bl func_stack0
; CHECK-TAIL-NOT: sub sp, sp
ret void
; CHECK: ldp x29, x30, [sp, #32]
; CHECK-NEXT: add sp, sp, #48
; CHECK-NEXT: ret
; CHECK-TAIL: ldp x29, x30, [sp, #32]
; CHECK-TAIL-NEXT: add sp, sp, #48
; CHECK-TAIL-NEXT: ret
}
define fastcc void @func_stack8([8 x i32], i32 %stacked) {
; CHECK-LABEL: func_stack8:
; CHECK: sub sp, sp, #48
; CHECK: stp x29, x30, [sp, #32]
; CHECK: add x29, sp, #32
; CHECK: str w{{[0-9]+}}, [sp]
; CHECK-TAIL-LABEL: func_stack8:
; CHECK-TAIL: sub sp, sp, #48
; CHECK-TAIL: stp x29, x30, [sp, #32]
; CHECK-TAIL: add x29, sp, #32
; CHECK-TAIL: str w{{[0-9]+}}, [sp]
call fastcc void @func_stack8([8 x i32] undef, i32 42)
; CHECK: bl func_stack8
; CHECK-NOT: sub sp, sp,
; CHECK-NOT: [sp, #{{[-0-9]+}}]!
; CHECK-NOT: [sp], #{{[-0-9]+}}
; CHECK-TAIL: bl func_stack8
; CHECK-TAIL: stp xzr, xzr, [sp, #-16]!
call fastcc void @func_stack32([8 x i32] undef, i128 0, i128 9)
; CHECK: bl func_stack32
; CHECK-NOT: sub sp, sp,
; CHECK-TAIL: bl func_stack32
; CHECK-TAIL: sub sp, sp, #32
call fastcc void @func_stack0()
; CHECK: bl func_stack0
; CHECK-NOT: sub sp, sp
; CHECK-TAIL: bl func_stack0
; CHECK-TAIL-NOT: sub sp, sp
ret void
; CHECK-NEXT: ldp x29, x30, [sp, #32]
; CHECK: add sp, sp, #48
; CHECK-NEXT: ret
; CHECK-TAIL: ldp x29, x30, [sp, #32]
; CHECK-TAIL-NEXT: add sp, sp, #64
; CHECK-TAIL-NEXT: ret
}
define fastcc void @func_stack32([8 x i32], i128 %stacked0, i128 %stacked1) {
; CHECK-LABEL: func_stack32:
; CHECK: add x29, sp, #32
; CHECK-TAIL-LABEL: func_stack32:
; CHECK-TAIL: add x29, sp, #32
call fastcc void @func_stack8([8 x i32] undef, i32 42)
; CHECK: bl func_stack8
; CHECK-NOT: sub sp, sp,
; CHECK-NOT: [sp, #{{[-0-9]+}}]!
; CHECK-NOT: [sp], #{{[-0-9]+}}
; CHECK-TAIL: bl func_stack8
; CHECK-TAIL: stp xzr, xzr, [sp, #-16]!
call fastcc void @func_stack32([8 x i32] undef, i128 0, i128 9)
; CHECK: bl func_stack32
; CHECK-NOT: sub sp, sp,
; CHECK-TAIL: bl func_stack32
; CHECK-TAIL: sub sp, sp, #32
call fastcc void @func_stack0()
; CHECK: bl func_stack0
; CHECK-NOT: sub sp, sp
; CHECK-TAIL: bl func_stack0
; CHECK-TAIL-NOT: sub sp, sp
ret void
; CHECK: ldp x29, x30, [sp, #32]
; CHECK-NEXT: add sp, sp, #48
; CHECK-NEXT: ret
; CHECK-TAIL: ldp x29, x30, [sp, #32]
; CHECK-TAIL-NEXT: add sp, sp, #80
; CHECK-TAIL-NEXT: ret
}
; Check that arg stack pop is done after callee-save restore when no frame pointer is used.
define fastcc void @func_stack32_leaf([8 x i32], i128 %stacked0, i128 %stacked1) {
; CHECK-LABEL: func_stack32_leaf:
; CHECK: str x20, [sp, #-16]!
; CHECK: nop
; CHECK-NEXT: //NO_APP
; CHECK-NEXT: ldr x20, [sp], #16
; CHECK-NEXT: ret
; CHECK-TAIL-LABEL: func_stack32_leaf:
; CHECK-TAIL: str x20, [sp, #-16]!
; CHECK-TAIL: nop
; CHECK-TAIL-NEXT: //NO_APP
; CHECK-TAIL-NEXT: ldr x20, [sp], #16
; CHECK-TAIL-NEXT: add sp, sp, #32
; CHECK-TAIL-NEXT: ret
; CHECK-TAIL-RZ-LABEL: func_stack32_leaf:
; CHECK-TAIL-RZ: str x20, [sp, #-16]!
; CHECK-TAIL-RZ-NOT: sub sp, sp
; CHECK-TAIL-RZ: nop
; CHECK-TAIL-RZ-NEXT: //NO_APP
; CHECK-TAIL-RZ-NEXT: ldr x20, [sp], #16
; CHECK-TAIL-RZ-NEXT: add sp, sp, #32
; CHECK-TAIL-RZ-NEXT: ret
; Make sure there is a callee-save register to save/restore.
call void asm sideeffect "nop", "~{x20}"() nounwind
ret void
}
; Check that arg stack pop is done after callee-save restore when no frame pointer is used.
define fastcc void @func_stack32_leaf_local([8 x i32], i128 %stacked0, i128 %stacked1) {
; CHECK-LABEL: func_stack32_leaf_local:
; CHECK: sub sp, sp, #32
; CHECK-NEXT: str x20, [sp, #16]
; CHECK: nop
; CHECK-NEXT: //NO_APP
; CHECK-NEXT: ldr x20, [sp, #16]
; CHECK-NEXT: add sp, sp, #32
; CHECK-NEXT: ret
; CHECK-TAIL-LABEL: func_stack32_leaf_local:
; CHECK-TAIL: sub sp, sp, #32
; CHECK-TAIL-NEXT: str x20, [sp, #16]
; CHECK-TAIL: nop
; CHECK-TAIL-NEXT: //NO_APP
; CHECK-TAIL-NEXT: ldr x20, [sp, #16]
; CHECK-TAIL-NEXT: add sp, sp, #64
; CHECK-TAIL-NEXT: ret
; CHECK-TAIL-RZ-LABEL: func_stack32_leaf_local:
; CHECK-TAIL-RZ: str x20, [sp, #-16]!
; CHECK-TAIL-RZ-NOT: sub sp, sp
; CHECK-TAIL-RZ: nop
; CHECK-TAIL-RZ-NEXT: //NO_APP
; CHECK-TAIL-RZ-NEXT: ldr x20, [sp], #16
; CHECK-TAIL-RZ-NEXT: add sp, sp, #32
; CHECK-TAIL-RZ-NEXT: ret
%val0 = alloca [2 x i64], align 8
; Make sure there is a callee-save register to save/restore.
call void asm sideeffect "nop", "~{x20}"() nounwind
ret void
}
; Check that arg stack pop is done after callee-save restore when no frame pointer is used.
define fastcc void @func_stack32_leaf_local_nocs([8 x i32], i128 %stacked0, i128 %stacked1) {
; CHECK-LABEL: func_stack32_leaf_local_nocs:
; CHECK: sub sp, sp, #16
; CHECK: add sp, sp, #16
; CHECK-NEXT: ret
; CHECK-TAIL-LABEL: func_stack32_leaf_local_nocs:
; CHECK-TAIL: sub sp, sp, #16
; CHECK-TAIL: add sp, sp, #48
; CHECK-TAIL-NEXT: ret
; CHECK-TAIL-RZ-LABEL: func_stack32_leaf_local_nocs:
; CHECK-TAIL-RZ: add sp, sp, #32
; CHECK-TAIL-RZ-NEXT: ret
%val0 = alloca [2 x i64], align 8
ret void
}