xref: /llvm-project/llvm/test/CodeGen/X86/shrink-wrap-chkstk-x86_64.ll (revision 4e2b4f97a09500fb6ceb4f077c492fac056a6a0a)
1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2; RUN: llc -mtriple=x86_64-windows-gnu -exception-model=dwarf < %s | FileCheck %s
3
4%struct.A = type { [4096 x i8] }
5
6@a = common global i32 0, align 4
7@b = common global i32 0, align 4
8
9define void @fn1() nounwind uwtable {
10; CHECK-LABEL: fn1:
11; CHECK:       # %bb.0: # %entry
12; CHECK-NEXT:    movl a(%rip), %eax
13; CHECK-NEXT:    testl %eax, %eax
14; CHECK-NEXT:    jne .LBB0_2
15; CHECK-NEXT:  # %bb.1: # %select.true.sink
16; CHECK-NEXT:    cltq
17; CHECK-NEXT:    imulq $715827883, %rax, %rax # imm = 0x2AAAAAAB
18; CHECK-NEXT:    movq %rax, %rcx
19; CHECK-NEXT:    shrq $63, %rcx
20; CHECK-NEXT:    shrq $32, %rax
21; CHECK-NEXT:    addl %ecx, %eax
22; CHECK-NEXT:  .LBB0_2: # %select.end
23; CHECK-NEXT:    pushq %rax
24; CHECK-NEXT:    movl $4128, %eax # imm = 0x1020
25; CHECK-NEXT:    callq ___chkstk_ms
26; CHECK-NEXT:    subq %rax, %rsp
27; CHECK-NEXT:    movq {{[0-9]+}}(%rsp), %rax
28; CHECK-NEXT:    .cfi_def_cfa_offset 4144
29; CHECK-NEXT:    movl %eax, b(%rip)
30; CHECK-NEXT:    leaq {{[0-9]+}}(%rsp), %rcx
31; CHECK-NEXT:    # kill: def $ecx killed $ecx killed $rcx
32; CHECK-NEXT:    callq fn2
33; CHECK-NEXT:    addq $4136, %rsp # imm = 0x1028
34; CHECK-NEXT:    retq
35entry:
36  %ctx = alloca %struct.A, align 1
37  %0 = load i32, ptr @a, align 4
38  %tobool = icmp eq i32 %0, 0
39  %div = sdiv i32 %0, 6
40  %cond = select i1 %tobool, i32 %div, i32 %0
41  store i32 %cond, ptr @b, align 4
42  call void @llvm.lifetime.start.p0(i64 4096, ptr nonnull %ctx)
43  %1 = ptrtoint ptr %ctx to i64
44  %2 = trunc i64 %1 to i32
45  call void @fn2(i32 %2)
46  call void @llvm.lifetime.end.p0(i64 4096, ptr nonnull %ctx)
47  ret void
48}
49
50declare void @fn2(i32)
51declare void @llvm.lifetime.start.p0(i64, ptr nocapture)
52declare void @llvm.lifetime.end.p0(i64, ptr nocapture)
53
54