1 ; RUN: llc < %s | FileCheck %s
3 ; This testcase used to hit an assert during ISel. For details, see the big
4 ; comment inside the function.
7 ; The AND should be turned into a subreg access.
9 ; The shift (leal) should be folded into the scale of the address in the load.
11 ; CHECK: movl {{.*}},4),
13 target datalayout = "e-m:o-p:32:32-f64:32:64-f80:128-n8:16:32-S128"
14 target triple = "i386-apple-macosx10.6.0"
16 define void @foo(i32 %a) {
21 %tmp1694 = phi i32 [ 0, %bb ], [ %tmp1745, %bb1692 ]
22 %xor = xor i32 0, %tmp1694
24 ; %load1 = (load (and (shl %xor, 2), 1020))
25 %tmp1701 = shl i32 %xor, 2
26 %tmp1702 = and i32 %tmp1701, 1020
27 %tmp1703 = getelementptr inbounds [1028 x i8], ptr null, i32 0, i32 %tmp1702
28 %load1 = load i32, ptr %tmp1703, align 4
30 ; %load2 = (load (shl (and %xor, 255), 2))
31 %tmp1698 = and i32 %xor, 255
32 %tmp1706 = shl i32 %tmp1698, 2
33 %tmp1707 = getelementptr inbounds [1028 x i8], ptr null, i32 0, i32 %tmp1706
34 %load2 = load i32, ptr %tmp1707, align 4
36 %tmp1710 = or i32 %load2, %a
38 ; While matching xor we address-match %load1. The and-of-shift reassocication
39 ; in address matching transform this into into a shift-of-and and the resuting
40 ; node becomes identical to %load2. CSE replaces %load1 which leaves its
41 ; references in MatchScope and RecordedNodes stale.
42 %tmp1711 = xor i32 %load1, %tmp1710
44 %tmp1744 = getelementptr inbounds [256 x i32], ptr null, i32 0, i32 %tmp1711
45 store i32 0, ptr %tmp1744, align 4
46 %tmp1745 = add i32 %tmp1694, 1
47 indirectbr ptr undef, [label %bb1756, label %bb1692]
53 indirectbr ptr undef, [label %bb5721, label %bb5736]