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LoopVectorizer: Only allow vectorization of intrinsics. We can't know for sure that the functions 'abs' or 'round' are the functions from libm.

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rdar://15012650



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191122 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nadav Rotem
2013-09-21 00:27:05 +00:00
parent 74d3482f76
commit 2ecd8c90b0
2 changed files with 39 additions and 5 deletions
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13
lib/Transforms/Vectorize/LoopVectorize.cpp
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@@ -2925,9 +2925,18 @@ bool LoopVectorizationLegality::canVectorizeInstrs() {
// We still don't handle functions. However, we can ignore dbg intrinsic
// calls and we do handle certain intrinsic and libm functions.
CallInst *CI = dyn_cast<CallInst>(it);
if (CI && !getIntrinsicIDForCall(CI, TLI) && !isa<DbgInfoIntrinsic>(CI)) {
if (CI) {
DEBUG(dbgs() << "LV: Found a call site.\n");
return false;
if (!isa<IntrinsicInst>(it)) {
DEBUG(dbgs() << "LV: We only vectorize intrinsics.\n");
return false;
}
if (!getIntrinsicIDForCall(CI, TLI) && !isa<DbgInfoIntrinsic>(CI)) {
DEBUG(dbgs() << "LV: Found an unknown intrinsic.\n");
return false;
}
}
// Check that the instruction return type is vectorizable.