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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 6
; RUN: llc -mtriple=x86_64-unknown-windows-gnu < %s | FileCheck %s
; Check calling convention is correct for win64 when doing a tailcall
; for a pointer loaded from memory.
declare void @foo(i64, ptr)
define void @do_tailcall(ptr %objp) nounwind {
; CHECK-LABEL: do_tailcall:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rsi
; CHECK-NEXT: subq $32, %rsp
; CHECK-NEXT: movq %rcx, %rsi
; CHECK-NEXT: xorl %ecx, %ecx
; CHECK-NEXT: xorl %edx, %edx
; CHECK-NEXT: callq foo
; CHECK-NEXT: xorl %ecx, %ecx
; CHECK-NEXT: movq %rsi, %rax
; CHECK-NEXT: addq $32, %rsp
; CHECK-NEXT: popq %rsi
; CHECK-NEXT: rex64 jmpq *(%rax) # TAILCALL
tail call void @foo(i64 0, ptr null)
%fptr = load ptr, ptr %objp, align 8
tail call void %fptr(ptr null)
ret void
}
; Make sure aliases of ccc are also treated as win64 functions
define fastcc void @do_tailcall_fastcc(ptr %objp) nounwind {
; CHECK-LABEL: do_tailcall_fastcc:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rsi
; CHECK-NEXT: subq $32, %rsp
; CHECK-NEXT: movq %rcx, %rsi
; CHECK-NEXT: xorl %ecx, %ecx
; CHECK-NEXT: xorl %edx, %edx
; CHECK-NEXT: callq foo
; CHECK-NEXT: xorl %ecx, %ecx
; CHECK-NEXT: movq %rsi, %rax
; CHECK-NEXT: addq $32, %rsp
; CHECK-NEXT: popq %rsi
; CHECK-NEXT: rex64 jmpq *(%rax) # TAILCALL
tail call void @foo(i64 0, ptr null)
%fptr = load ptr, ptr %objp, align 8
tail call fastcc void %fptr(ptr null)
ret void
}
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