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author | Lang Hames <lhames@gmail.com> | 2012-04-24 18:58:36 +0000 |
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committer | Lang Hames <lhames@gmail.com> | 2012-04-24 18:58:36 +0000 |
commit | 1d9e68dab1fc29e3a5e05a3b0b8d7c70de5e10b2 (patch) | |
tree | 56eb583cdfc55544e7c01a939eee01be24873b75 /lib/Transforms/InstCombine/InstCombineCalls.cpp | |
parent | 7362ac7f8cc803708187fd6029de9f8f62ff2ed2 (diff) | |
download | llvm-1d9e68dab1fc29e3a5e05a3b0b8d7c70de5e10b2.tar.gz llvm-1d9e68dab1fc29e3a5e05a3b0b8d7c70de5e10b2.tar.bz2 llvm-1d9e68dab1fc29e3a5e05a3b0b8d7c70de5e10b2.tar.xz |
Add support for llvm.arm.neon.vmull* intrinsics to InstCombine. This fixes
<rdar://problem/11291436>.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155468 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/InstCombine/InstCombineCalls.cpp')
-rw-r--r-- | lib/Transforms/InstCombine/InstCombineCalls.cpp | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineCalls.cpp b/lib/Transforms/InstCombine/InstCombineCalls.cpp index 77e4727100..5ad9382e3c 100644 --- a/lib/Transforms/InstCombine/InstCombineCalls.cpp +++ b/lib/Transforms/InstCombine/InstCombineCalls.cpp @@ -14,6 +14,7 @@ #include "InstCombine.h" #include "llvm/Support/CallSite.h" #include "llvm/Target/TargetData.h" +#include "llvm/Analysis/InstructionSimplify.h" #include "llvm/Analysis/MemoryBuiltins.h" #include "llvm/Transforms/Utils/BuildLibCalls.h" #include "llvm/Transforms/Utils/Local.h" @@ -694,6 +695,40 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) { break; } + case Intrinsic::arm_neon_vmulls: + case Intrinsic::arm_neon_vmullu: { + // Zext/sext intrinsic operands according to the intrinsic type, then try to + // simplify them. This lets us try a SimplifyMulInst on the extended + // operands. If the zext/sext instructions are unused when we're done then + // delete them from the block. + Value* Arg0 = II->getArgOperand(0); + Value* Arg1 = II->getArgOperand(1); + bool Zext = (II->getIntrinsicID() == Intrinsic::arm_neon_vmullu); + Instruction *Arg0W = + Zext ? CastInst::CreateZExtOrBitCast(Arg0, II->getType(), "", II) : + CastInst::CreateSExtOrBitCast(Arg0, II->getType(), "", II); + Value* Arg0WS = SimplifyInstruction(Arg0W); + if (Arg0WS == 0) // If simplification fails just pass through the ext'd val. + Arg0WS = Arg0W; + Instruction *Arg1W = + Zext ? CastInst::CreateZExtOrBitCast(Arg1, II->getType(), "", II) : + CastInst::CreateSExtOrBitCast(Arg1, II->getType(), "", II); + Value* Arg1WS = SimplifyInstruction(Arg1W); + if (Arg1WS == 0) + Arg1WS = Arg1W; + Instruction *SimplifiedInst = 0; + if (Value* V = SimplifyMulInst(Arg0WS, Arg1WS, TD)) { + SimplifiedInst = ReplaceInstUsesWith(CI, V); + } + if (Arg0W->use_empty()) + Arg0W->eraseFromParent(); + if (Arg1W->use_empty()) + Arg1W->eraseFromParent(); + if (SimplifiedInst != 0) + return SimplifiedInst; + break; + } + case Intrinsic::stackrestore: { // If the save is right next to the restore, remove the restore. This can // happen when variable allocas are DCE'd. |