1 ; RUN: opt -S -loop-vectorize -force-vector-width=4 -force-vector-unroll=1 -dce -instcombine < %s | FileCheck %s 2 3 target 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 accross 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: test_vh 13 ; CHECK-NOT: store <4 x i8> undef 14 15 define void @test_vh(i32* %ptr265, i32* %ptr266, i32 %sub267) { 16 entry: 17 br label %loop 18 19 loop: 20 %inc = phi i32 [ %sub267, %entry ], [ %add, %loop] 21 %ext.inc = sext i32 %inc to i64 22 %add.ptr265 = getelementptr inbounds i32* %ptr265, i64 %ext.inc 23 %add.ptr266 = getelementptr inbounds i32* %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 28 block1: 29 %sub267.lcssa = phi i32 [ %add, %loop ] 30 %add.ptr266.lcssa = phi i32* [ %add.ptr266, %loop ] 31 %add.ptr265.lcssa = phi i32* [ %add.ptr265, %loop ] 32 %tmp29 = bitcast i32* %add.ptr265.lcssa to i8* 33 %tmp30 = bitcast i32* %add.ptr266.lcssa to i8* 34 br label %do.body272 35 36 do.body272: 37 %row_width.5 = phi i32 [ %sub267.lcssa, %block1 ], [ %dec, %do.body272 ] 38 %sp.4 = phi i8* [ %tmp30, %block1 ], [ %incdec.ptr273, %do.body272 ] 39 %dp.addr.4 = phi i8* [ %tmp29, %block1 ], [ %incdec.ptr274, %do.body272 ] 40 %incdec.ptr273 = getelementptr inbounds i8* %sp.4, i64 1 41 %tmp31 = load i8* %sp.4, align 1 42 %incdec.ptr274 = getelementptr inbounds i8* %dp.addr.4, i64 1 43 store i8 %tmp31, i8* %dp.addr.4, align 1 44 %dec = add i32 %row_width.5, -1 45 %cmp276 = icmp eq i32 %dec, 0 46 br i1 %cmp276, label %loop.exit, label %do.body272 47 48 loop.exit: 49 ret void 50 } 51
