llvm-mirror/test/CodeGen/AArch64/arm64-call-tailcalls.ll
Matthias Braun f87d29dc88 AArch64: Cleanup tailcall CC check, enable swiftcc.
Cleanup/change the code that checks for possible tailcall conventions to
look the same as the one in the X86 target. This makes the distinction
between calling conventions that can guarnatee tailcalls and the ones
that may tailcall more obvious.

- Add Swift to the mayTailCall list
- PreserveMost seemed to be incorrectly part of the guarnteed tail call
  list, move it to the mayTailCall list.

llvm-svn: 281376
2016-09-13 19:27:38 +00:00

101 lines
2.5 KiB
LLVM

; RUN: llc < %s -mtriple=arm64-apple-ios7.0 | FileCheck %s
@t = weak global i32 ()* null
@x = external global i32, align 4
define void @t2() {
; CHECK-LABEL: t2:
; CHECK: adrp x[[GOTADDR:[0-9]+]], _t@GOTPAGE
; CHECK: ldr x[[ADDR:[0-9]+]], [x[[GOTADDR]], _t@GOTPAGEOFF]
; CHECK: ldr x[[DEST:[0-9]+]], [x[[ADDR]]]
; CHECK: br x[[DEST]]
%tmp = load i32 ()*, i32 ()** @t
%tmp.upgrd.2 = tail call i32 %tmp()
ret void
}
define void @t3() {
; CHECK-LABEL: t3:
; CHECK: b _t2
tail call void @t2()
ret void
}
define double @t4(double %a) nounwind readonly ssp {
; CHECK-LABEL: t4:
; CHECK: b _sin
%tmp = tail call double @sin(double %a) nounwind readonly
ret double %tmp
}
define float @t5(float %a) nounwind readonly ssp {
; CHECK-LABEL: t5:
; CHECK: b _sinf
%tmp = tail call float @sinf(float %a) nounwind readonly
ret float %tmp
}
define void @t7() nounwind {
; CHECK-LABEL: t7:
; CHECK: b _foo
; CHECK: b _bar
br i1 undef, label %bb, label %bb1.lr.ph
bb1.lr.ph: ; preds = %entry
tail call void @bar() nounwind
ret void
bb: ; preds = %entry
tail call void @foo() nounwind
ret void
}
define i32 @t8(i32 %x) nounwind ssp {
; CHECK-LABEL: t8:
; CHECK: b _c
; CHECK: b _a
; CHECK: b _b
%and = and i32 %x, 1
%tobool = icmp eq i32 %and, 0
br i1 %tobool, label %if.end, label %if.then
if.then: ; preds = %entry
%call = tail call i32 @a(i32 %x) nounwind
br label %return
if.end: ; preds = %entry
%and1 = and i32 %x, 2
%tobool2 = icmp eq i32 %and1, 0
br i1 %tobool2, label %if.end5, label %if.then3
if.then3: ; preds = %if.end
%call4 = tail call i32 @b(i32 %x) nounwind
br label %return
if.end5: ; preds = %if.end
%call6 = tail call i32 @c(i32 %x) nounwind
br label %return
return: ; preds = %if.end5, %if.then3, %if.then
%retval.0 = phi i32 [ %call, %if.then ], [ %call4, %if.then3 ], [ %call6, %if.end5 ]
ret i32 %retval.0
}
declare float @sinf(float) nounwind readonly
declare double @sin(double) nounwind readonly
declare void @bar() nounwind
declare void @foo() nounwind
declare i32 @a(i32)
declare i32 @b(i32)
declare i32 @c(i32)
; CHECK-LABEL: tswift:
; CHECK: b _swiftfunc
define swiftcc i32 @tswift(i32 %a) nounwind {
%res = tail call i32 @swiftfunc(i32 %a)
ret i32 %res
}
declare swiftcc i32 @swiftfunc(i32) nounwind