1 ; RUN: opt -S -loop-vectorize -force-vector-unroll=1 -force-vector-width=2 < %s | FileCheck %s 2 3 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32-S128" 4 5 @f = common global i32 0, align 4 6 @.str = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1 7 @c = common global i32 0, align 4 8 @a = common global i32 0, align 4 9 @b = common global i32 0, align 4 10 @e = common global i32 0, align 4 11 12 ; We used to vectorize this loop. But it has a value that is used outside of the 13 ; and is not a recognized reduction variable "tmp17". 14 15 ; CHECK-LABEL: @main( 16 ; CHECK-NOT: <2 x i32> 17 18 define i32 @main() { 19 bb: 20 %b.promoted = load i32* @b, align 4 21 br label %.lr.ph.i 22 23 .lr.ph.i: 24 %tmp8 = phi i32 [ %tmp18, %bb16 ], [ %b.promoted, %bb ] 25 %tmp2 = icmp sgt i32 %tmp8, 10 26 br i1 %tmp2, label %bb16, label %bb10 27 28 bb10: 29 br label %bb16 30 31 bb16: 32 %tmp17 = phi i32 [ 0, %bb10 ], [ 1, %.lr.ph.i ] 33 %tmp18 = add nsw i32 %tmp8, 1 34 %tmp19 = icmp slt i32 %tmp18, 4 35 br i1 %tmp19, label %.lr.ph.i, label %f1.exit.loopexit 36 37 f1.exit.loopexit: 38 %.lcssa = phi i32 [ %tmp17, %bb16 ] 39 ret i32 %.lcssa 40 } 41 42 ; Don't vectorize this loop. Its phi node (induction variable) has an outside 43 ; loop user. We currently don't handle this case. 44 ; PR17179 45 46 ; CHECK-LABEL: @test2( 47 ; CHECK-NOT: <2 x 48 49 @x1 = common global i32 0, align 4 50 @x2 = common global i32 0, align 4 51 @x0 = common global i32 0, align 4 52 53 define i32 @test2() { 54 entry: 55 store i32 0, i32* @x1, align 4 56 %0 = load i32* @x0, align 4 57 br label %for.cond1.preheader 58 59 for.cond1.preheader: 60 %inc7 = phi i32 [ 0, %entry ], [ %inc, %for.cond1.preheader ] 61 %inc = add nsw i32 %inc7, 1 62 %cmp = icmp eq i32 %inc, 52 63 br i1 %cmp, label %for.end5, label %for.cond1.preheader 64 65 for.end5: 66 %inc7.lcssa = phi i32 [ %inc7, %for.cond1.preheader ] 67 %xor = xor i32 %inc7.lcssa, %0 68 store i32 52, i32* @x1, align 4 69 store i32 1, i32* @x2, align 4 70 ret i32 %xor 71 } 72
