1 ; RUN: opt -loop-reduce -S < %s | FileCheck %s
3 ; Test LSR's intelligence regarding phi reuse.
4 ; Verify that scaled GEPs are not reused. rdar://5064068
6 target triple = "x86-apple-darwin"
9 ; multiplies are hoisted out of the loop
10 ; CHECK: while.body.lr.ph:
20 ; CHECK: bitcast float* {{.*}} to i8*
21 ; CHECK: bitcast float* {{.*}} to i8*
22 ; CHECK: getelementptr i8*
23 ; CHECK: getelementptr i8*
25 define float @test(float* nocapture %A, float* nocapture %B, i32 %N, i32 %IA, i32 %IB) nounwind uwtable readonly ssp {
27 %cmp1 = icmp sgt i32 %N, 0
28 br i1 %cmp1, label %while.body.lr.ph, label %while.end
30 while.body.lr.ph: ; preds = %entry
31 %idx.ext = sext i32 %IA to i64
32 %idx.ext2 = sext i32 %IB to i64
35 while.body: ; preds = %while.body.lr.ph, %while.body
36 %A.addr.05 = phi float* [ %A, %while.body.lr.ph ], [ %add.ptr, %while.body ]
37 %B.addr.04 = phi float* [ %B, %while.body.lr.ph ], [ %add.ptr3, %while.body ]
38 %N.addr.03 = phi i32 [ %N, %while.body.lr.ph ], [ %sub, %while.body ]
39 %Sum0.02 = phi float [ 0.000000e+00, %while.body.lr.ph ], [ %add, %while.body ]
40 %0 = load float* %A.addr.05, align 4
41 %1 = load float* %B.addr.04, align 4
42 %mul = fmul float %0, %1
43 %add = fadd float %Sum0.02, %mul
44 %add.ptr = getelementptr inbounds float* %A.addr.05, i64 %idx.ext
45 %add.ptr3 = getelementptr inbounds float* %B.addr.04, i64 %idx.ext2
46 %sub = add nsw i32 %N.addr.03, -1
47 %cmp = icmp sgt i32 %sub, 0
48 br i1 %cmp, label %while.body, label %while.end
50 while.end: ; preds = %while.body, %entry
51 %Sum0.0.lcssa = phi float [ 0.000000e+00, %entry ], [ %add, %while.body ]
52 ret float %Sum0.0.lcssa