1 ; RUN: opt -S -loop-vectorize -force-vector-interleave=1 -force-vector-width=2 < %s 2>&1 | FileCheck %s 2 3 ; CHECK: remark: {{.*}}: loop not vectorized: value could not be identified as an induction or reduction variable 4 ; CHECK: remark: {{.*}}: loop not vectorized: use of induction value outside of the loop is not handled by vectorizer 5 6 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" 7 8 @f = common global i32 0, align 4 9 @.str = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1 10 @c = common global i32 0, align 4 11 @a = common global i32 0, align 4 12 @b = common global i32 0, align 4 13 @e = common global i32 0, align 4 14 15 ; We used to vectorize this loop. But it has a value that is used outside of the 16 ; and is not a recognized reduction variable "tmp17". 17 18 ; CHECK-LABEL: @main( 19 ; CHECK-NOT: <2 x i32> 20 21 define i32 @main() { 22 bb: 23 %b.promoted = load i32, i32* @b, align 4 24 br label %.lr.ph.i 25 26 .lr.ph.i: 27 %tmp8 = phi i32 [ %tmp18, %bb16 ], [ %b.promoted, %bb ] 28 %tmp2 = icmp sgt i32 %tmp8, 10 29 br i1 %tmp2, label %bb16, label %bb10 30 31 bb10: 32 br label %bb16 33 34 bb16: 35 %tmp17 = phi i32 [ 0, %bb10 ], [ 1, %.lr.ph.i ] 36 %tmp18 = add nsw i32 %tmp8, 1 37 %tmp19 = icmp slt i32 %tmp18, 4 38 br i1 %tmp19, label %.lr.ph.i, label %f1.exit.loopexit 39 40 f1.exit.loopexit: 41 %.lcssa = phi i32 [ %tmp17, %bb16 ] 42 ret i32 %.lcssa 43 } 44 45 ; Don't vectorize this loop. Its phi node (induction variable) has an outside 46 ; loop user. We currently don't handle this case. 47 ; PR17179 48 49 ; CHECK-LABEL: @test2( 50 ; CHECK-NOT: <2 x 51 52 @x1 = common global i32 0, align 4 53 @x2 = common global i32 0, align 4 54 @x0 = common global i32 0, align 4 55 56 define i32 @test2() { 57 entry: 58 store i32 0, i32* @x1, align 4 59 %0 = load i32, i32* @x0, align 4 60 br label %for.cond1.preheader 61 62 for.cond1.preheader: 63 %inc7 = phi i32 [ 0, %entry ], [ %inc, %for.cond1.preheader ] 64 %inc = add nsw i32 %inc7, 1 65 %cmp = icmp eq i32 %inc, 52 66 br i1 %cmp, label %for.end5, label %for.cond1.preheader 67 68 for.end5: 69 %inc7.lcssa = phi i32 [ %inc7, %for.cond1.preheader ] 70 %xor = xor i32 %inc7.lcssa, %0 71 store i32 52, i32* @x1, align 4 72 store i32 1, i32* @x2, align 4 73 ret i32 %xor 74 } 75
