1 ; RUN: opt -S < %s -loop-unroll -unroll-count=4 -disable-iv-rewrite | FileCheck %s
3 ; Test induction variable simplify after loop unrolling. It should
4 ; expose nice opportunities for GVN.
6 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f80:128:128-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32"
8 ; PR10534: LoopUnroll not keeping canonical induction variable...
10 ; CHECK: %shr.1 = lshr i32 %bit_addr.addr.01, 5
11 ; CHECK: %arrayidx.1 = getelementptr inbounds i32* %bitmap, i32 %shr.1
12 ; CHECK: while.body.2:
13 ; CHECK: %shr.2 = lshr i32 %bit_addr.addr.01, 5
14 ; CHECK: %arrayidx.2 = getelementptr inbounds i32* %bitmap, i32 %shr.2
15 ; CHECK: while.body.3:
16 ; CHECK: %shr.3 = lshr i32 %bit_addr.addr.01, 5
17 ; CHECK: %arrayidx.3 = getelementptr inbounds i32* %bitmap, i32 %shr.3
18 define void @FlipBit(i32* nocapture %bitmap, i32 %bit_addr, i32 %nbits) nounwind {
23 %nbits.addr.02 = phi i32 [ 128, %entry ], [ %dec, %while.body ]
24 %bit_addr.addr.01 = phi i32 [ 0, %entry ], [ %inc, %while.body ]
25 %dec = add i32 %nbits.addr.02, -1
26 %shr = lshr i32 %bit_addr.addr.01, 5
27 %rem = and i32 %bit_addr.addr.01, 31
28 %shl = shl i32 1, %rem
29 %arrayidx = getelementptr inbounds i32* %bitmap, i32 %shr
30 %tmp6 = load i32* %arrayidx, align 4
31 %xor = xor i32 %tmp6, %shl
32 store i32 %xor, i32* %arrayidx, align 4
33 %inc = add i32 %bit_addr.addr.01, 1
34 %tobool = icmp eq i32 %dec, 0
35 br i1 %tobool, label %while.end, label %while.body