forked from OSchip/llvm-project
5bbb5aafc1
The recommit is to fix a bug about ExtractValue and InsertValue ops. For those
ops, some varargs inside GVN::Expression are not value numbers but raw index
numbers. It is wrong to do phi-translate for raw index numbers, and the fix is
to stop doing that.
Right now scalarpre doesn't have phi-translate support, so it will miss some
simple pre opportunities. Like the following testcase, current scalarpre cannot
recognize the last "a * b" is fully redundent because a and b used by the last
"a * b" expr are both defined by phis.
long a[100], b[100], g1, g2, g3;
__attribute__((pure)) long goo();
void foo(long a, long b, long c, long d) {
g1 = a * b;
if (__builtin_expect(g2 > 3, 0)) {
a = c;
b = d;
g2 = a * b;
}
g3 = a * b; // fully redundant.
}
The patch adds phi-translate support in scalarpre. This is only a temporary
solution before the newpre based on newgvn is available.
Differential Revision: https://reviews.llvm.org/D32252
llvm-svn: 304050
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| .. | ||
| PRE | ||
| 2007-07-25-DominatedLoop.ll | ||
| 2007-07-25-InfiniteLoop.ll | ||
| 2007-07-25-Loop.ll | ||
| 2007-07-25-NestedLoop.ll | ||
| 2007-07-25-SinglePredecessor.ll | ||
| 2007-07-26-InterlockingLoops.ll | ||
| 2007-07-26-NonRedundant.ll | ||
| 2007-07-26-PhiErasure.ll | ||
| 2007-07-30-PredIDom.ll | ||
| 2007-07-31-NoDomInherit.ll | ||
| 2007-07-31-RedundantPhi.ll | ||
| 2008-02-12-UndefLoad.ll | ||
| 2008-02-13-NewPHI.ll | ||
| 2008-07-02-Unreachable.ll | ||
| 2008-12-09-SelfRemove.ll | ||
| 2008-12-12-RLE-Crash.ll | ||
| 2008-12-14-rle-reanalyze.ll | ||
| 2008-12-15-CacheVisited.ll | ||
| 2009-01-21-SortInvalidation.ll | ||
| 2009-01-22-SortInvalidation.ll | ||
| 2009-03-10-PREOnVoid.ll | ||
| 2009-07-13-MemDepSortFail.ll | ||
| 2009-11-12-MemDepMallocBitCast.ll | ||
| 2010-03-31-RedundantPHIs.ll | ||
| 2010-05-08-OneBit.ll | ||
| 2010-11-13-Simplify.ll | ||
| 2011-04-27-phioperands.ll | ||
| 2011-07-07-MatchIntrinsicExtract.ll | ||
| 2011-09-07-TypeIdFor.ll | ||
| 2012-05-22-PreCrash.ll | ||
| 2016-08-30-MaskedScatterGather.ll | ||
| MemdepMiscompile.ll | ||
| assume-equal.ll | ||
| basic-undef-test.ll | ||
| basic.ll | ||
| big-endian.ll | ||
| bitcast-of-call.ll | ||
| br-identical.ll | ||
| calloc-load-removal.ll | ||
| calls-nonlocal.ll | ||
| calls-readonly.ll | ||
| commute.ll | ||
| cond_br.ll | ||
| cond_br2.ll | ||
| condprop.ll | ||
| crash-no-aa.ll | ||
| crash.ll | ||
| dbg-redundant-load.ll | ||
| debugloc.ll | ||
| edge.ll | ||
| fence.ll | ||
| flags.ll | ||
| fold-const-expr.ll | ||
| fpmath.ll | ||
| funclet.ll | ||
| invariant.group.ll | ||
| invariant.start.ll | ||
| lifetime-simple.ll | ||
| load-constant-mem.ll | ||
| load-from-unreachable-predecessor.ll | ||
| malloc-load-removal.ll | ||
| no_speculative_loads_with_asan.ll | ||
| noalias.ll | ||
| non-integral-pointers.ll | ||
| non-local-offset.ll | ||
| nonescaping-malloc.ll | ||
| null-aliases-nothing.ll | ||
| opt-remarks.ll | ||
| phi-translate-partial-alias.ll | ||
| pr10820.ll | ||
| pr12979.ll | ||
| pr14166.ll | ||
| pr17732.ll | ||
| pr17852.ll | ||
| pr24397.ll | ||
| pr24426.ll | ||
| pr25440.ll | ||
| pr28562.ll | ||
| pre-compare.ll | ||
| pre-new-inst.ll | ||
| propagate-ir-flags.ll | ||
| range.ll | ||
| readattrs.ll | ||
| rle-must-alias.ll | ||
| rle-no-phi-translate.ll | ||
| rle-nonlocal.ll | ||
| stale-loop-info.ll | ||
| tbaa.ll | ||
| unreachable_block_infinite_loop.ll | ||
| volatile-nonvolatile.ll | ||