1; RUN: llc -mtriple=thumbv7-apple-ios -disable-block-placement < %s | FileCheck %s
2; RUN: llc -mtriple=armv7-apple-ios   -disable-block-placement < %s | FileCheck %s
3
4; LLVM IR optimizers canonicalize icmp+select this way.
5; Make sure that TwoAddressInstructionPass can commute the corresponding
6; MOVCC instructions to avoid excessive copies in one of the if blocks.
7;
8; CHECK: %if.then
9; CHECK-NOT: mov
10; CHECK: movlo
11; CHECK: movlo
12; CHECK-NOT: mov
13
14; CHECK: %if.else
15; CHECK-NOT: mov
16; CHECK: movls
17; CHECK: movls
18; CHECK-NOT: mov
19
20; This is really an LSR test: Make sure that cmp is using the incremented
21; induction variable.
22; CHECK: %if.end8
23; CHECK: add{{(s|\.w)?}} [[IV:r[0-9]+]], {{.*}}#1
24; CHECK: cmp [[IV]], #
25
26define i32 @f(i32* nocapture %a, i32 %Pref) nounwind ssp {
27entry:
28  br label %for.body
29
30for.body:                                         ; preds = %entry, %if.end8
31  %i.012 = phi i32 [ 0, %entry ], [ %inc, %if.end8 ]
32  %BestCost.011 = phi i32 [ -1, %entry ], [ %BestCost.1, %if.end8 ]
33  %BestIdx.010 = phi i32 [ 0, %entry ], [ %BestIdx.1, %if.end8 ]
34  %arrayidx = getelementptr inbounds i32, i32* %a, i32 %i.012
35  %0 = load i32, i32* %arrayidx, align 4
36  %mul = mul i32 %0, %0
37  %sub = add nsw i32 %i.012, -5
38  %cmp2 = icmp eq i32 %sub, %Pref
39  br i1 %cmp2, label %if.else, label %if.then
40
41if.then:                                          ; preds = %for.body
42  %cmp3 = icmp ult i32 %mul, %BestCost.011
43  %i.0.BestIdx.0 = select i1 %cmp3, i32 %i.012, i32 %BestIdx.010
44  %mul.BestCost.0 = select i1 %cmp3, i32 %mul, i32 %BestCost.011
45  br label %if.end8
46
47if.else:                                          ; preds = %for.body
48  %cmp5 = icmp ugt i32 %mul, %BestCost.011
49  %BestIdx.0.i.0 = select i1 %cmp5, i32 %BestIdx.010, i32 %i.012
50  %BestCost.0.mul = select i1 %cmp5, i32 %BestCost.011, i32 %mul
51  br label %if.end8
52
53if.end8:                                          ; preds = %if.else, %if.then
54  %BestIdx.1 = phi i32 [ %i.0.BestIdx.0, %if.then ], [ %BestIdx.0.i.0, %if.else ]
55  %BestCost.1 = phi i32 [ %mul.BestCost.0, %if.then ], [ %BestCost.0.mul, %if.else ]
56  store i32 %mul, i32* %arrayidx, align 4
57  %inc = add i32 %i.012, 1
58  %cmp = icmp eq i32 %inc, 11
59  br i1 %cmp, label %for.end, label %for.body
60
61for.end:                                          ; preds = %if.end8
62  ret i32 %BestIdx.1
63}
64