test/CodeGen/PowerPC/iabs.ll


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

; RUN: llvm-as < %s | llc -march=ppc32 -stats |& \
; RUN:   grep {4 .*Number of machine instrs printed}

;; Integer absolute value, should produce something as good as:
;;      srawi r2, r3, 31
;;      add r3, r3, r2
;;      xor r3, r3, r2
;;      blr 
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
}