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Use inbounds GEPs for memcpy and memset lowering
Follow-up on discussion in http://reviews.llvm.org/D11220 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242542 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -87,13 +87,14 @@ void convertMemCpyToLoop(Instruction *ConvertedInst, Value *SrcAddr,
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// load from SrcAddr+LoopIndex
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// TODO: we can leverage the align parameter of llvm.memcpy for more efficient
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// word-sized loads and stores.
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Value *Element = LoopBuilder.CreateLoad(
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LoopBuilder.CreateGEP(LoopBuilder.getInt8Ty(), SrcAddr, LoopIndex),
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Value *Element =
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LoopBuilder.CreateLoad(LoopBuilder.CreateInBoundsGEP(
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LoopBuilder.getInt8Ty(), SrcAddr, LoopIndex),
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SrcIsVolatile);
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// store at DstAddr+LoopIndex
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LoopBuilder.CreateStore(
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Element,
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LoopBuilder.CreateGEP(LoopBuilder.getInt8Ty(), DstAddr, LoopIndex),
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LoopBuilder.CreateStore(Element,
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LoopBuilder.CreateInBoundsGEP(LoopBuilder.getInt8Ty(),
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DstAddr, LoopIndex),
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DstIsVolatile);
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// The value for LoopIndex coming from backedge is (LoopIndex + 1)
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@ -225,7 +226,8 @@ void convertMemSetToLoop(Instruction *ConvertedInst, Value *DstAddr,
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LoopIndex->addIncoming(ConstantInt::get(CopyLen->getType(), 0), OrigBB);
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LoopBuilder.CreateStore(
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SetValue, LoopBuilder.CreateGEP(SetValue->getType(), DstAddr, LoopIndex),
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SetValue,
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LoopBuilder.CreateInBoundsGEP(SetValue->getType(), DstAddr, LoopIndex),
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false);
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Value *NewIndex =
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@ -18,9 +18,9 @@ entry:
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; IR-LABEL: @memcpy_caller
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; IR: loadstoreloop:
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; IR: [[LOADPTR:%[0-9]+]] = getelementptr i8, i8* %src, i64
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; IR: [[LOADPTR:%[0-9]+]] = getelementptr inbounds i8, i8* %src, i64
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; IR-NEXT: [[VAL:%[0-9]+]] = load i8, i8* [[LOADPTR]]
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; IR-NEXT: [[STOREPTR:%[0-9]+]] = getelementptr i8, i8* %dst, i64
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; IR-NEXT: [[STOREPTR:%[0-9]+]] = getelementptr inbounds i8, i8* %dst, i64
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; IR-NEXT: store i8 [[VAL]], i8* [[STOREPTR]]
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; PTX-LABEL: .visible .func (.param .b64 func_retval0) memcpy_caller
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@ -61,8 +61,8 @@ entry:
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; IR-LABEL: @memcpy_casting_caller
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; IR: [[DSTCAST:%[0-9]+]] = bitcast i32* %dst to i8*
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; IR: [[SRCCAST:%[0-9]+]] = bitcast i32* %src to i8*
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; IR: getelementptr i8, i8* [[SRCCAST]]
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; IR: getelementptr i8, i8* [[DSTCAST]]
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; IR: getelementptr inbounds i8, i8* [[SRCCAST]]
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; IR: getelementptr inbounds i8, i8* [[DSTCAST]]
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}
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define i8* @memset_caller(i8* %dst, i32 %c, i64 %n) #0 {
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@ -74,7 +74,7 @@ entry:
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; IR-LABEL: @memset_caller
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; IR: [[VAL:%[0-9]+]] = trunc i32 %c to i8
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; IR: loadstoreloop:
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; IR: [[STOREPTR:%[0-9]+]] = getelementptr i8, i8* %dst, i64
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; IR: [[STOREPTR:%[0-9]+]] = getelementptr inbounds i8, i8* %dst, i64
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; IR-NEXT: store i8 [[VAL]], i8* [[STOREPTR]]
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; PTX-LABEL: .visible .func (.param .b64 func_retval0) memset_caller(
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