1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=i686-- < %s | FileCheck %s
; No attributes, should not use idiv
define i32 @test1(i32 inreg %x) {
; CHECK-LABEL: test1:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: movl %eax, %ecx
; CHECK-NEXT: sarl $31, %ecx
; CHECK-NEXT: shrl $28, %ecx
; CHECK-NEXT: addl %ecx, %eax
; CHECK-NEXT: sarl $4, %eax
; CHECK-NEXT: retl
entry:
%div = sdiv i32 %x, 16
ret i32 %div
}
; Has minsize (-Oz) attribute, should generate idiv
define i32 @test2(i32 inreg %x) minsize {
; CHECK-LABEL: test2:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: pushl $16
; CHECK-NEXT: .cfi_adjust_cfa_offset 4
; CHECK-NEXT: popl %ecx
; CHECK-NEXT: .cfi_adjust_cfa_offset -4
; CHECK-NEXT: cltd
; CHECK-NEXT: idivl %ecx
; CHECK-NEXT: retl
entry:
%div = sdiv i32 %x, 16
ret i32 %div
}
; Has optsize (-Os) attribute, should not generate idiv
define i32 @test3(i32 inreg %x) optsize {
; CHECK-LABEL: test3:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: movl %eax, %ecx
; CHECK-NEXT: sarl $31, %ecx
; CHECK-NEXT: shrl $28, %ecx
; CHECK-NEXT: addl %ecx, %eax
; CHECK-NEXT: sarl $4, %eax
; CHECK-NEXT: retl
entry:
%div = sdiv i32 %x, 16
ret i32 %div
}
|
