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https://github.com/c64scene-ar/llvm-6502.git
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Bill Wendling
dd9c5e98c8
------------------------------------------------------------------------ r195162 | arnolds | 2013-11-19 14:20:20 -0800 (Tue, 19 Nov 2013) | 12 lines SLPVectorizer: Fix stale for Value pointer array We are slicing an array of Value pointers and process those slices in a loop. The problem is that we might invalidate a later slice by vectorizing a former slice. Use a WeakVH to track the pointer. If the pointer is deleted or RAUW'ed we can tell. The test case will only fail when running with libgmalloc. radar://15498655 ------------------------------------------------------------------------ git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_34@195222 91177308-0d34-0410-b5e6-96231b3b80d8
34 lines
1.2 KiB
LLVM
34 lines
1.2 KiB
LLVM
; RUN: opt -slp-vectorizer -S %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-n32:64-S128"
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target triple = "x86_64-apple-macosx"
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; This test used to fail under libgmalloc. Because we would try to access a
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; pointer that was already deleted.
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;
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; llvm-lit -v --param use_gmalloc=1 --param
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; gmalloc_path=/usr/lib/libgmalloc.dylib
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; test/Transforms/LoopVectorize/X86/rauw-bug.ll
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;
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; radar://15498655
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; CHECK: reduced
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define void @reduced() {
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entry:
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br i1 undef, label %while.body, label %while.cond63.preheader.while.end76_crit_edge
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while.cond63.preheader.while.end76_crit_edge:
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ret void
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while.body:
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%d2_fx.015 = phi double [ %sub52, %while.body ], [ undef, %entry ]
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%d2_fy.014 = phi double [ %sub58, %while.body ], [ undef, %entry ]
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%d3_fy.013 = phi double [ %div56, %while.body ], [ undef, %entry ]
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%d3_fx.012 = phi double [ %div50, %while.body ], [ undef, %entry ]
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%div50 = fmul double %d3_fx.012, 1.250000e-01
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%sub52 = fsub double 0.000000e+00, %div50
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%div56 = fmul double %d3_fy.013, 1.250000e-01
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%sub58 = fsub double 0.000000e+00, %div56
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br label %while.body
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}
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