1 ; RUN: llc < %s -tailcallopt -mcpu=generic -mtriple=x86_64-linux -post-RA-scheduler=true | FileCheck %s 2 ; RUN: llc < %s -tailcallopt -mcpu=generic -mtriple=x86_64-win32 -post-RA-scheduler=true | FileCheck %s 3 4 ; FIXME: Redundant unused stack allocation could be eliminated. 5 ; CHECK: subq ${{24|72|80}}, %rsp 6 7 ; Check that lowered arguments on the stack do not overwrite each other. 8 ; Add %in1 %p1 to a different temporary register (%eax). 9 ; CHECK: movl [[A1:32|144]](%rsp), [[R1:%e..]] 10 ; Move param %in1 to temp register (%r10d). 11 ; CHECK: movl [[A2:40|152]](%rsp), [[R2:%[a-z0-9]+]] 12 ; Add %in1 %p1 to a different temporary register (%eax). 13 ; CHECK: addl {{%edi|%ecx}}, [[R1]] 14 ; Move param %in2 to stack. 15 ; CHECK-DAG: movl [[R2]], [[A1]](%rsp) 16 ; Move result of addition to stack. 17 ; CHECK-DAG: movl [[R1]], [[A2]](%rsp) 18 ; Eventually, do a TAILCALL 19 ; CHECK: TAILCALL 20 21 declare fastcc i32 @tailcallee(i32 %p1, i32 %p2, i32 %p3, i32 %p4, i32 %p5, i32 %p6, i32 %a, i32 %b) nounwind 22 23 define fastcc i32 @tailcaller(i32 %p1, i32 %p2, i32 %p3, i32 %p4, i32 %p5, i32 %p6, i32 %in1, i32 %in2) nounwind { 24 entry: 25 %tmp = add i32 %in1, %p1 26 %retval = tail call fastcc i32 @tailcallee(i32 %p1, i32 %p2, i32 %p3, i32 %p4, i32 %p5, i32 %p6, i32 %in2,i32 %tmp) 27 ret i32 %retval 28 } 29
