83 lines
1.9 KiB
LLVM
83 lines
1.9 KiB
LLVM
; RUN: opt -codegenprepare -S < %s | FileCheck %s
|
|
|
|
target triple = "armv8m.main-none-eabi"
|
|
|
|
declare ptr @f0()
|
|
declare ptr @f1()
|
|
declare void @llvm.lifetime.start.p0(i64, ptr nocapture) nounwind
|
|
declare void @llvm.lifetime.end.p0(i64, ptr nocapture) nounwind
|
|
|
|
define ptr @tail_dup() {
|
|
; CHECK-LABEL: tail_dup
|
|
; CHECK: tail call ptr @f0()
|
|
; CHECK-NEXT: ret ptr
|
|
; CHECK: tail call ptr @f1()
|
|
; CHECK-NEXT: ret ptr
|
|
bb0:
|
|
%a = alloca i32
|
|
call void @llvm.lifetime.start.p0(i64 -1, ptr %a) nounwind
|
|
%tmp0 = tail call ptr @f0()
|
|
br label %return
|
|
bb1:
|
|
%tmp1 = tail call ptr @f1()
|
|
br label %return
|
|
return:
|
|
%retval = phi ptr [ %tmp0, %bb0 ], [ %tmp1, %bb1 ]
|
|
call void @llvm.lifetime.end.p0(i64 -1, ptr %a) nounwind
|
|
ret ptr %retval
|
|
}
|
|
|
|
define nonnull ptr @nonnull_dup() {
|
|
; CHECK-LABEL: nonnull_dup
|
|
; CHECK: tail call ptr @f0()
|
|
; CHECK-NEXT: ret ptr
|
|
; CHECK: tail call ptr @f1()
|
|
; CHECK-NEXT: ret ptr
|
|
bb0:
|
|
%tmp0 = tail call ptr @f0()
|
|
br label %return
|
|
bb1:
|
|
%tmp1 = tail call ptr @f1()
|
|
br label %return
|
|
return:
|
|
%retval = phi ptr [ %tmp0, %bb0 ], [ %tmp1, %bb1 ]
|
|
ret ptr %retval
|
|
}
|
|
|
|
define ptr @noalias_dup() {
|
|
; CHECK-LABEL: noalias_dup
|
|
; CHECK: tail call noalias ptr @f0()
|
|
; CHECK-NEXT: ret ptr
|
|
; CHECK: tail call noalias ptr @f1()
|
|
; CHECK-NEXT: ret ptr
|
|
bb0:
|
|
%tmp0 = tail call noalias ptr @f0()
|
|
br label %return
|
|
bb1:
|
|
%tmp1 = tail call noalias ptr @f1()
|
|
br label %return
|
|
return:
|
|
%retval = phi ptr [ %tmp0, %bb0 ], [ %tmp1, %bb1 ]
|
|
ret ptr %retval
|
|
}
|
|
|
|
; Use inreg as a way of testing that attributes (other than nonnull and
|
|
; noalias) disable the tailcall duplication in cgp.
|
|
|
|
define inreg ptr @inreg_nodup() {
|
|
; CHECK-LABEL: inreg_nodup
|
|
; CHECK: tail call ptr @f0()
|
|
; CHECK-NEXT: br label %return
|
|
; CHECK: tail call ptr @f1()
|
|
; CHECK-NEXT: br label %return
|
|
bb0:
|
|
%tmp0 = tail call ptr @f0()
|
|
br label %return
|
|
bb1:
|
|
%tmp1 = tail call ptr @f1()
|
|
br label %return
|
|
return:
|
|
%retval = phi ptr [ %tmp0, %bb0 ], [ %tmp1, %bb1 ]
|
|
ret ptr %retval
|
|
}
|