1; RUN: opt -S -passes=loop-vectorize,dce,instcombine -force-vector-width=4 -force-vector-interleave=1 < %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; PR16073 6 7; Because we were caching value pointers across a function call that could RAUW 8; we would generate an undefined value store below: 9; SCEVExpander::expandCodeFor would change a value (the start value of an 10; induction) that we cached in the induction variable list. 11 12; CHECK-LABEL: @test_vh( 13; CHECK-NOT: store <4 x i8> undef 14 15define void @test_vh(ptr %ptr265, ptr %ptr266, i32 %sub267) { 16entry: 17 br label %loop 18 19loop: 20 %inc = phi i32 [ %sub267, %entry ], [ %add, %loop] 21 %ext.inc = sext i32 %inc to i64 22 %add.ptr265 = getelementptr inbounds i32, ptr %ptr265, i64 %ext.inc 23 %add.ptr266 = getelementptr inbounds i32, ptr %ptr266, i64 %ext.inc 24 %add = add i32 %inc, 9 25 %cmp = icmp slt i32 %add, 140 26 br i1 %cmp, label %block1, label %loop 27 28block1: 29 %sub267.lcssa = phi i32 [ %add, %loop ] 30 %add.ptr266.lcssa = phi ptr [ %add.ptr266, %loop ] 31 %add.ptr265.lcssa = phi ptr [ %add.ptr265, %loop ] 32 br label %do.body272 33 34do.body272: 35 %row_width.5 = phi i32 [ %sub267.lcssa, %block1 ], [ %dec, %do.body272 ] 36 %sp.4 = phi ptr [ %add.ptr266.lcssa, %block1 ], [ %incdec.ptr273, %do.body272 ] 37 %dp.addr.4 = phi ptr [ %add.ptr265.lcssa, %block1 ], [ %incdec.ptr274, %do.body272 ] 38 %incdec.ptr273 = getelementptr inbounds i8, ptr %sp.4, i64 1 39 %tmp31 = load i8, ptr %sp.4, align 1 40 %incdec.ptr274 = getelementptr inbounds i8, ptr %dp.addr.4, i64 1 41 store i8 %tmp31, ptr %dp.addr.4, align 1 42 %dec = add i32 %row_width.5, -1 43 %cmp276 = icmp eq i32 %dec, 0 44 br i1 %cmp276, label %loop.exit, label %do.body272 45 46loop.exit: 47 ret void 48} 49