1 ; RUN: opt -S -instcombine < %s | FileCheck %s
5 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
6 target triple = "x86_64-apple-macosx10.8.0"
9 ; CHECK: udiv i32 %x, 400
11 define i32 @udiv400(i32 %x) {
14 %div1 = udiv i32 %div, 100
19 ; CHECK: sdiv i32 %x, 400
21 define i32 @sdiv400(i32 %x) {
24 %div1 = sdiv i32 %div, 100
32 define i32 @udiv400_no(i32 %x) {
35 %div1 = udiv i32 %div, 100
40 ; CHECK: udiv i32 %x, 400
42 define i32 @sdiv400_yes(i32 %x) {
45 ; The sign bits of both operands are zero (i.e. we can prove they are
46 ; unsigned inputs), turn this into a udiv.
47 ; Next, optimize this just like sdiv.
48 %div1 = sdiv i32 %div, 100
54 ; CHECK: udiv i80 %x, 400
56 define i80 @udiv_i80(i80 %x) {
58 %div1 = udiv i80 %div, 100
63 ; CHECK: sdiv i80 %x, 400
65 define i80 @sdiv_i80(i80 %x) {
67 %div1 = sdiv i80 %div, 100
72 define i32 @no_crash_notconst_sdiv(i32 %x, i32 %notconst) {
73 %div = ashr i32 %x, %notconst
74 %div1 = sdiv i32 %div, 100
78 define i32 @no_crash_notconst_udiv(i32 %x, i32 %notconst) {
79 %div = lshr i32 %x, %notconst
80 %div1 = udiv i32 %div, 100