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Fix simplifylibcalls memset recognition to work on 64-bit platforms
where int is 32 bits. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76293 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -994,12 +994,12 @@ struct VISIBILITY_HIDDEN MemSetOpt : public LibCallOptimization {
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const FunctionType *FT = Callee->getFunctionType();
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if (FT->getNumParams() != 3 || FT->getReturnType() != FT->getParamType(0) ||
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!isa<PointerType>(FT->getParamType(0)) ||
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FT->getParamType(1) != TD->getIntPtrType() ||
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!isa<IntegerType>(FT->getParamType(1)) ||
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FT->getParamType(2) != TD->getIntPtrType())
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return 0;
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// memset(p, v, n) -> llvm.memset(p, v, n, 1)
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Value *Val = B.CreateTrunc(CI->getOperand(2), Type::Int8Ty);
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Value *Val = B.CreateIntCast(CI->getOperand(2), Type::Int8Ty, false);
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EmitMemSet(CI->getOperand(1), Val, CI->getOperand(3), B);
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return CI->getOperand(1);
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}
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12
test/Transforms/SimplifyLibCalls/memset-64.ll
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12
test/Transforms/SimplifyLibCalls/memset-64.ll
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@ -0,0 +1,12 @@
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; RUN: llvm-as < %s | opt -simplify-libcalls | llvm-dis | grep {llvm.memset}
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
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target triple = "x86_64-pc-linux-gnu"
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define void @a(i8* %x) nounwind {
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entry:
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%call = call i8* @memset(i8* %x, i32 1, i64 100) ; <i8*> [#uses=0]
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ret void
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}
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declare i8* @memset(i8*, i32, i64)
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