1 ; RUN: llc < %s -mtriple=x86_64-linux-gnu -tailcallopt -code-model=large | FileCheck %s
3 declare fastcc i32 @callee(i32 %arg)
4 define fastcc i32 @directcall(i32 %arg) {
6 ; This is the large code model, so &callee may not fit into the jmp
7 ; instruction. Instead, stick it into a register.
8 ; CHECK: movabsq $callee, [[REGISTER:%r[a-z0-9]+]]
9 ; CHECK: jmpq *[[REGISTER]] # TAILCALL
10 %res = tail call fastcc i32 @callee(i32 %arg)
14 ; Check that the register used for an indirect tail call doesn't
15 ; clobber any of the arguments.
16 define fastcc i32 @indirect_manyargs(i32(i32,i32,i32,i32,i32,i32,i32)* %target) {
17 ; Adjust the stack to enter the function. (The amount of the
18 ; adjustment may change in the future, in which case the location of
19 ; the stack argument and the return adjustment will change too.)
20 ; CHECK: subq $8, %rsp
21 ; Put the call target into R11, which won't be clobbered while restoring
22 ; callee-saved registers and won't be used for passing arguments.
23 ; CHECK: movq %rdi, %rax
24 ; Pass the stack argument.
25 ; CHECK: movl $7, 16(%rsp)
26 ; Pass the register arguments, in the right registers.
27 ; CHECK: movl $1, %edi
28 ; CHECK: movl $2, %esi
29 ; CHECK: movl $3, %edx
30 ; CHECK: movl $4, %ecx
31 ; CHECK: movl $5, %r8d
32 ; CHECK: movl $6, %r9d
33 ; Adjust the stack to "return".
34 ; CHECK: addq $8, %rsp
35 ; And tail-call to the target.
36 ; CHECK: jmpq *%rax # TAILCALL
37 %res = tail call fastcc i32 %target(i32 1, i32 2, i32 3, i32 4, i32 5,
42 ; Check that the register used for a direct tail call doesn't clobber
43 ; any of the arguments.
44 declare fastcc i32 @manyargs_callee(i32,i32,i32,i32,i32,i32,i32)
45 define fastcc i32 @direct_manyargs() {
46 ; Adjust the stack to enter the function. (The amount of the
47 ; adjustment may change in the future, in which case the location of
48 ; the stack argument and the return adjustment will change too.)
49 ; CHECK: subq $8, %rsp
50 ; Pass the stack argument.
51 ; CHECK: movl $7, 16(%rsp)
52 ; Pass the register arguments, in the right registers.
53 ; CHECK: movl $1, %edi
54 ; CHECK: movl $2, %esi
55 ; CHECK: movl $3, %edx
56 ; CHECK: movl $4, %ecx
57 ; CHECK: movl $5, %r8d
58 ; CHECK: movl $6, %r9d
59 ; This is the large code model, so &manyargs_callee may not fit into
60 ; the jmp instruction. Put it into R11, which won't be clobbered
61 ; while restoring callee-saved registers and won't be used for passing
63 ; CHECK: movabsq $manyargs_callee, %rax
64 ; Adjust the stack to "return".
65 ; CHECK: addq $8, %rsp
66 ; And tail-call to the target.
67 ; CHECK: jmpq *%rax # TAILCALL
68 %res = tail call fastcc i32 @manyargs_callee(i32 1, i32 2, i32 3, i32 4,