1 ; RUN: llc < %s -mtriple=i386-linux-gnu | FileCheck %s
3 declare x86_regcallcc i32 @callee(i32 %a0, i32 %b0, i32 %c0, i32 %d0, i32 %e0);
5 ; In RegCall calling convention, ESI and EDI are callee saved registers.
6 ; One might think that the caller could assume that ESI value is the same before
7 ; and after calling the callee.
8 ; However, RegCall also says that a register that was used for
9 ; passing/returning argumnets, can be assumed to be modified by the callee.
10 ; In other words, it is no longer a callee saved register.
11 ; In this case we want to see that EDX/ECX values are saved and EDI/ESI are assumed
12 ; to be modified by the callee.
13 ; This is a hipe CC function that doesn't save any register for the caller.
14 ; So we can be sure that there is no other reason to save EDX/ECX.
15 ; The caller arguments are expected to be passed (in the following order)
16 ; in registers: ESI, EBP, EAX, EDX and ECX.
17 define cc 11 i32 @caller(i32 %a0, i32 %b0, i32 %c0, i32 %d0, i32 %e0) nounwind {
18 %b1 = call x86_regcallcc i32 @callee(i32 %a0, i32 %b0, i32 %c0, i32 %d0, i32 %e0)
19 %b2 = add i32 %b1, %d0
20 %b3 = add i32 %b2, %e0
24 ; CHECK: subl $12, %esp
25 ; CHECK-NEXT: movl %ecx, 8(%esp)
26 ; CHECK-NEXT: movl %edx, %ebx
27 ; CHECK-NEXT: movl %eax, %edx
28 ; CHECK-NEXT: movl %esi, %eax
29 ; CHECK-NEXT: movl %ebp, %ecx
30 ; CHECK-NEXT: movl %ebx, %edi
31 ; CHECK-NEXT: movl 8(%esp), %ebp
32 ; CHECK-NEXT: movl %ebp, %esi
33 ; CHECK-NEXT: calll callee
34 ; CHECK-NEXT: leal (%eax,%ebx), %esi
35 ; CHECK-NEXT: addl %ebp, %esi
36 ; CHECK-NEXT: addl $12, %esp
39 !hipe.literals = !{ !0, !1, !2 }
40 !0 = !{ !"P_NSP_LIMIT", i32 120 }
41 !1 = !{ !"X86_LEAF_WORDS", i32 24 }
42 !2 = !{ !"AMD64_LEAF_WORDS", i32 18 }
44 ; Make sure that the callee doesn't save parameters that were passed as arguments.
45 ; The caller arguments are expected to be passed (in the following order)
46 ; in registers: EAX, ECX, EDX, EDI and ESI.
47 ; The result will return in EAX, ECX and EDX.
48 define x86_regcallcc {i32, i32, i32} @test_callee(i32 %a0, i32 %b0, i32 %c0, i32 %d0, i32 %e0) nounwind {
52 %b4 = insertvalue {i32, i32, i32} undef, i32 %b1, 0
53 %b5 = insertvalue {i32, i32, i32} %b4, i32 %b2, 1
54 %b6 = insertvalue {i32, i32, i32} %b5, i32 %b3, 2
55 ret {i32, i32, i32} %b6
57 ; CHECK-LABEL: test_callee
58 ; CHECK-NOT: pushl %esi
59 ; CHECK-NOT: pushl %edi