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author | Pirama Arumuga Nainar <pirama@google.com> | 2015-05-06 11:46:36 -0700 |
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committer | Pirama Arumuga Nainar <pirama@google.com> | 2015-05-18 10:52:30 -0700 |
commit | 2c3e0051c31c3f5b2328b447eadf1cf9c4427442 (patch) | |
tree | c0104029af14e9f47c2ef58ca60e6137691f3c9b /lib/Transforms/InstCombine/InstCombineCasts.cpp | |
parent | e1bc145815f4334641be19f1c45ecf85d25b6e5a (diff) | |
download | external_llvm-2c3e0051c31c3f5b2328b447eadf1cf9c4427442.zip external_llvm-2c3e0051c31c3f5b2328b447eadf1cf9c4427442.tar.gz external_llvm-2c3e0051c31c3f5b2328b447eadf1cf9c4427442.tar.bz2 |
Update aosp/master LLVM for rebase to r235153
Change-Id: I9bf53792f9fc30570e81a8d80d296c681d005ea7
(cherry picked from commit 0c7f116bb6950ef819323d855415b2f2b0aad987)
Diffstat (limited to 'lib/Transforms/InstCombine/InstCombineCasts.cpp')
-rw-r--r-- | lib/Transforms/InstCombine/InstCombineCasts.cpp | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineCasts.cpp b/lib/Transforms/InstCombine/InstCombineCasts.cpp index fe544c2..bd79a26 100644 --- a/lib/Transforms/InstCombine/InstCombineCasts.cpp +++ b/lib/Transforms/InstCombine/InstCombineCasts.cpp @@ -1450,42 +1450,6 @@ Instruction *InstCombiner::commonPointerCastTransforms(CastInst &CI) { CI.setOperand(0, GEP->getOperand(0)); return &CI; } - - // If the GEP has a single use, and the base pointer is a bitcast, and the - // GEP computes a constant offset, see if we can convert these three - // instructions into fewer. This typically happens with unions and other - // non-type-safe code. - unsigned AS = GEP->getPointerAddressSpace(); - unsigned OffsetBits = DL.getPointerSizeInBits(AS); - APInt Offset(OffsetBits, 0); - BitCastInst *BCI = dyn_cast<BitCastInst>(GEP->getOperand(0)); - if (GEP->hasOneUse() && BCI && GEP->accumulateConstantOffset(DL, Offset)) { - // FIXME: This is insufficiently tested - just a no-crash test - // (test/Transforms/InstCombine/2007-05-14-Crash.ll) - // - // Get the base pointer input of the bitcast, and the type it points to. - Value *OrigBase = BCI->getOperand(0); - SmallVector<Value*, 8> NewIndices; - if (FindElementAtOffset(OrigBase->getType(), Offset.getSExtValue(), - NewIndices)) { - // FIXME: This codepath is completely untested - could be unreachable - // for all I know. - // If we were able to index down into an element, create the GEP - // and bitcast the result. This eliminates one bitcast, potentially - // two. - Value *NGEP = cast<GEPOperator>(GEP)->isInBounds() - ? Builder->CreateInBoundsGEP(OrigBase, NewIndices) - : Builder->CreateGEP( - OrigBase->getType()->getPointerElementType(), - OrigBase, NewIndices); - NGEP->takeName(GEP); - - if (isa<BitCastInst>(CI)) - return new BitCastInst(NGEP, CI.getType()); - assert(isa<PtrToIntInst>(CI)); - return new PtrToIntInst(NGEP, CI.getType()); - } - } } return commonCastTransforms(CI); |