shrink-wrap-chkstk-x86_64.ll
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=x86_64-windows-gnu -exception-model=dwarf < %s | FileCheck %s
%struct.A = type { [4096 x i8] }
@a = common global i32 0, align 4
@b = common global i32 0, align 4
define void @fn1() nounwind uwtable {
; CHECK-LABEL: fn1:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: movl $4136, %eax # imm = 0x1028
; CHECK-NEXT: callq ___chkstk_ms
; CHECK-NEXT: subq %rax, %rsp
; CHECK-NEXT: .cfi_def_cfa_offset 4144
; CHECK-NEXT: movl {{.*}}(%rip), %eax
; CHECK-NEXT: testl %eax, %eax
; CHECK-NEXT: jne .LBB0_2
; CHECK-NEXT: # %bb.1: # %select.true.sink
; CHECK-NEXT: cltq
; CHECK-NEXT: imulq $715827883, %rax, %rax # imm = 0x2AAAAAAB
; CHECK-NEXT: movq %rax, %rcx
; CHECK-NEXT: shrq $63, %rcx
; CHECK-NEXT: shrq $32, %rax
; CHECK-NEXT: addl %ecx, %eax
; CHECK-NEXT: .LBB0_2: # %select.end
; CHECK-NEXT: movl %eax, {{.*}}(%rip)
; CHECK-NEXT: leaq {{[0-9]+}}(%rsp), %rcx
; CHECK-NEXT: # kill: def $ecx killed $ecx killed $rcx
; CHECK-NEXT: callq fn2
; CHECK-NEXT: addq $4136, %rsp # imm = 0x1028
; CHECK-NEXT: retq
entry:
%ctx = alloca %struct.A, align 1
%0 = load i32, i32* @a, align 4
%tobool = icmp eq i32 %0, 0
%div = sdiv i32 %0, 6
%cond = select i1 %tobool, i32 %div, i32 %0
store i32 %cond, i32* @b, align 4
%1 = getelementptr inbounds %struct.A, %struct.A* %ctx, i64 0, i32 0, i64 0
call void @llvm.lifetime.start.p0i8(i64 4096, i8* nonnull %1)
%2 = ptrtoint %struct.A* %ctx to i64
%3 = trunc i64 %2 to i32
call void @fn2(i32 %3)
call void @llvm.lifetime.end.p0i8(i64 4096, i8* nonnull %1)
ret void
}
declare void @fn2(i32)
declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture)
declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture)