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
|
; RUN: llc < %s -march=x86 -asm-verbose=false | FileCheck %s -check-prefix=FP-ELIM
; RUN: llc < %s -march=x86 -asm-verbose=false -disable-fp-elim | FileCheck %s -check-prefix=NO-ELIM
; RUN: llc < %s -march=x86 -asm-verbose=false -disable-non-leaf-fp-elim | FileCheck %s -check-prefix=NON-LEAF
; Implement -momit-leaf-frame-pointer
; rdar://7886181
define i32 @t1() nounwind readnone {
entry:
; FP-ELIM: t1:
; FP-ELIM-NEXT: movl
; FP-ELIM-NEXT: ret
; NO-ELIM: t1:
; NO-ELIM-NEXT: pushl %ebp
; NO-ELIM: popl %ebp
; NO-ELIM-NEXT: ret
; NON-LEAF: t1:
; NON-LEAF-NEXT: movl
; NON-LEAF-NEXT: ret
ret i32 10
}
define void @t2() nounwind {
entry:
; FP-ELIM: t2:
; FP-ELIM-NOT: pushl %ebp
; FP-ELIM: ret
; NO-ELIM: t2:
; NO-ELIM-NEXT: pushl %ebp
; NO-ELIM: popl %ebp
; NO-ELIM-NEXT: ret
; NON-LEAF: t2:
; NON-LEAF-NEXT: pushl %ebp
; NON-LEAF: popl %ebp
; NON-LEAF-NEXT: ret
tail call void @foo(i32 0) nounwind
ret void
}
declare void @foo(i32)
|
