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65d9b93021
The Value pointers we store in the induction variable list can be RAUW'ed by a call to SCEVExpander::expandCodeFor, use a TrackingVH instead. Do the same thing in some other places where we store pointers that could potentially be RAUW'ed. Fixes PR16073. llvm-svn: 182485
51 lines
1.8 KiB
LLVM
51 lines
1.8 KiB
LLVM
; RUN: opt -S -loop-vectorize -force-vector-width=4 -force-vector-unroll=1 -dce -instcombine < %s | FileCheck %s
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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"
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; PR16073
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; Because we were caching value pointers accross a function call that could RAUW
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; we would generate an undefined value store below:
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; SCEVExpander::expandCodeFor would change a value (the start value of an
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; induction) that we cached in the induction variable list.
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; CHECK: test_vh
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; CHECK-NOT: store <4 x i8> undef
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define void @test_vh(i32* %ptr265, i32* %ptr266, i32 %sub267) {
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entry:
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br label %loop
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loop:
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%inc = phi i32 [ %sub267, %entry ], [ %add, %loop]
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%ext.inc = sext i32 %inc to i64
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%add.ptr265 = getelementptr inbounds i32* %ptr265, i64 %ext.inc
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%add.ptr266 = getelementptr inbounds i32* %ptr266, i64 %ext.inc
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%add = add i32 %inc, 9
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%cmp = icmp slt i32 %add, 140
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br i1 %cmp, label %block1, label %loop
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block1:
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%sub267.lcssa = phi i32 [ %add, %loop ]
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%add.ptr266.lcssa = phi i32* [ %add.ptr266, %loop ]
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%add.ptr265.lcssa = phi i32* [ %add.ptr265, %loop ]
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%tmp29 = bitcast i32* %add.ptr265.lcssa to i8*
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%tmp30 = bitcast i32* %add.ptr266.lcssa to i8*
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br label %do.body272
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do.body272:
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%row_width.5 = phi i32 [ %sub267.lcssa, %block1 ], [ %dec, %do.body272 ]
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%sp.4 = phi i8* [ %tmp30, %block1 ], [ %incdec.ptr273, %do.body272 ]
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%dp.addr.4 = phi i8* [ %tmp29, %block1 ], [ %incdec.ptr274, %do.body272 ]
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%incdec.ptr273 = getelementptr inbounds i8* %sp.4, i64 1
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%tmp31 = load i8* %sp.4, align 1
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%incdec.ptr274 = getelementptr inbounds i8* %dp.addr.4, i64 1
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store i8 %tmp31, i8* %dp.addr.4, align 1
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%dec = add i32 %row_width.5, -1
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%cmp276 = icmp eq i32 %dec, 0
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br i1 %cmp276, label %loop.exit, label %do.body272
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loop.exit:
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ret void
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}
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