1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
; RUN: llvm-as < %s | llc -march=arm -stats |& \
; RUN: grep {3 .*Number of machine instrs printed}
; RUN: llvm-as < %s | llc -march=thumb -stats |& \
; RUN: grep {4 .*Number of machine instrs printed}
;; Integer absolute value, should produce something as good as: ARM:
;; add r3, r0, r0, asr #31
;; eor r0, r3, r0, asr #31
;; bx lr
;; Thumb:
;; asr r2, r0, #31
;; add r0, r0, r2
;; eor r0, r2
;; bx lr
define i32 @test(i32 %a) {
%tmp1neg = sub i32 0, %a
%b = icmp sgt i32 %a, -1
%abs = select i1 %b, i32 %a, i32 %tmp1neg
ret i32 %abs
}
|
