mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-21 18:29:45 +00:00
2615b686d3
Tailcalls are only OK with forwarded sret pointers. With sret demotion, they're not, as we'd have a pointer into a soon-to-be-dead stack frame. Differential Revison: http://reviews.llvm.org/D8510 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233409 91177308-0d34-0410-b5e6-96231b3b80d8
47 lines
1.4 KiB
LLVM
47 lines
1.4 KiB
LLVM
; RUN: llc < %s -mtriple arm64-apple-darwin -aarch64-load-store-opt=false -asm-verbose=false | FileCheck %s
|
|
; Disable the load/store optimizer to avoid having LDP/STPs and simplify checks.
|
|
|
|
target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
|
|
|
|
; Check that we don't try to tail-call with an sret-demoted return.
|
|
|
|
declare i1024 @test_sret() #0
|
|
|
|
; CHECK-LABEL: _test_call_sret:
|
|
; CHECK: mov x[[CALLERX8NUM:[0-9]+]], x8
|
|
; CHECK: mov x8, sp
|
|
; CHECK-NEXT: bl _test_sret
|
|
; CHECK-NEXT: ldr [[CALLERSRET1:x[0-9]+]], [sp]
|
|
; CHECK: str [[CALLERSRET1:x[0-9]+]], [x[[CALLERX8NUM]]]
|
|
; CHECK: ret
|
|
define i1024 @test_call_sret() #0 {
|
|
%a = call i1024 @test_sret()
|
|
ret i1024 %a
|
|
}
|
|
|
|
; CHECK-LABEL: _test_tailcall_sret:
|
|
; CHECK: mov x[[CALLERX8NUM:[0-9]+]], x8
|
|
; CHECK: mov x8, sp
|
|
; CHECK-NEXT: bl _test_sret
|
|
; CHECK-NEXT: ldr [[CALLERSRET1:x[0-9]+]], [sp]
|
|
; CHECK: str [[CALLERSRET1:x[0-9]+]], [x[[CALLERX8NUM]]]
|
|
; CHECK: ret
|
|
define i1024 @test_tailcall_sret() #0 {
|
|
%a = tail call i1024 @test_sret()
|
|
ret i1024 %a
|
|
}
|
|
|
|
; CHECK-LABEL: _test_indirect_tailcall_sret:
|
|
; CHECK: mov x[[CALLERX8NUM:[0-9]+]], x8
|
|
; CHECK: mov x8, sp
|
|
; CHECK-NEXT: blr x0
|
|
; CHECK-NEXT: ldr [[CALLERSRET1:x[0-9]+]], [sp]
|
|
; CHECK: str [[CALLERSRET1:x[0-9]+]], [x[[CALLERX8NUM]]]
|
|
; CHECK: ret
|
|
define i1024 @test_indirect_tailcall_sret(i1024 ()* %f) #0 {
|
|
%a = tail call i1024 %f()
|
|
ret i1024 %a
|
|
}
|
|
|
|
attributes #0 = { nounwind }
|