1; RUN: opt -passes=loop-vectorize -force-vector-interleave=2 -force-vector-width=1 -S %s | FileCheck %s 2 3target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" 4 5 6; Test for PR54427. 7define void @test_nonconst_start_and_step(ptr %dst, i32 %start, i32 %step, i64 %N) { 8; CHECK-LABEL: @test_nonconst_start_and_step( 9; CHECK: [[NEG_STEP:%.+]] = sub i32 0, %step 10; CHECK: vector.body: 11; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %vector.ph ], [ [[INDEX_NEXT:%.*]], %vector.body ] 12; CHECK-NEXT: [[INDUCTION3:%.*]] = add i64 [[INDEX]], 0 13; CHECK-NEXT: [[INDUCTION4:%.*]] = add i64 [[INDEX]], 1 14; CHECK-NEXT: [[TMP2:%.*]] = trunc i64 [[INDEX]] to i32 15; CHECK-NEXT: [[TMP3:%.*]] = mul i32 [[TMP2]], [[NEG_STEP]] 16; CHECK-NEXT: [[OFFSET_IDX:%.*]] = add i32 %start, [[TMP3]] 17; CHECK-NEXT: [[TMP4:%.*]] = mul i32 0, [[NEG_STEP]] 18; CHECK-NEXT: [[INDUCTION:%.*]] = add i32 [[OFFSET_IDX]], [[TMP4]] 19; CHECK-NEXT: [[TMP5:%.*]] = mul i32 1, [[NEG_STEP]] 20; CHECK-NEXT: [[INDUCTION2:%.*]] = add i32 [[OFFSET_IDX]], [[TMP5]] 21; CHECK-NEXT: [[TMP6:%.*]] = sub nsw i32 [[INDUCTION]], %step 22; CHECK-NEXT: [[TMP7:%.*]] = sub nsw i32 [[INDUCTION2]], %step 23; CHECK-NEXT: [[TMP8:%.*]] = getelementptr inbounds i32, ptr [[DST:%.*]], i64 [[INDUCTION3]] 24; CHECK-NEXT: [[TMP9:%.*]] = getelementptr inbounds i32, ptr [[DST]], i64 [[INDUCTION4]] 25; CHECK-NEXT: store i32 [[TMP6]], ptr [[TMP8]], align 2 26; CHECK-NEXT: store i32 [[TMP7]], ptr [[TMP9]], align 2 27; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2 28; CHECK-NEXT: [[TMP10:%.*]] = icmp eq i64 [[INDEX_NEXT]] 29; CHECK-NEXT: br i1 [[TMP10]], label %middle.block, label %vector.body 30; 31entry: 32 br label %loop 33 34loop: 35 %primary.iv = phi i64 [ 0, %entry ], [ %primary.iv.next, %loop ] 36 %iv.down = phi i32 [ %start, %entry ], [ %iv.down.next, %loop ] 37 %iv.down.next = sub nsw i32 %iv.down, %step 38 %gep.dst = getelementptr inbounds i32, ptr %dst, i64 %primary.iv 39 store i32 %iv.down.next, ptr %gep.dst, align 2 40 %primary.iv.next = add nuw nsw i64 %primary.iv, 1 41 %exitcond = icmp eq i64 %primary.iv.next, %N 42 br i1 %exitcond, label %exit, label %loop 43 44exit: 45 ret void 46} 47