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Fix simplifylibcalls memset recognition to work on 64-bit platforms

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where int is 32 bits.

llvm-svn: 76293
This commit is contained in:
Eli Friedman 2009-07-18 08:34:51 +00:00
parent e872040bf1
commit 7b1597133d
2 changed files with 14 additions and 2 deletions
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4
lib/Transforms/Scalar/SimplifyLibCalls.cpp
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@ -994,12 +994,12 @@ struct VISIBILITY_HIDDEN MemSetOpt : public LibCallOptimization {
const FunctionType *FT = Callee->getFunctionType();
if (FT->getNumParams() != 3 || FT->getReturnType() != FT->getParamType(0) ||
!isa<PointerType>(FT->getParamType(0)) ||
FT->getParamType(1) != TD->getIntPtrType() ||
!isa<IntegerType>(FT->getParamType(1)) ||
FT->getParamType(2) != TD->getIntPtrType())
return 0;
// memset(p, v, n) -> llvm.memset(p, v, n, 1)
Value *Val = B.CreateTrunc(CI->getOperand(2), Type::Int8Ty);
Value *Val = B.CreateIntCast(CI->getOperand(2), Type::Int8Ty, false);
EmitMemSet(CI->getOperand(1), Val, CI->getOperand(3), B);
return CI->getOperand(1);
}

12
test/Transforms/SimplifyLibCalls/memset-64.ll Normal file
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@ -0,0 +1,12 @@
; RUN: llvm-as < %s | opt -simplify-libcalls | llvm-dis | grep {llvm.memset}
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"
target triple = "x86_64-pc-linux-gnu"
define void @a(i8* %x) nounwind {
entry:
%call = call i8* @memset(i8* %x, i32 1, i64 100) ; <i8*> [#uses=0]
ret void
}
declare i8* @memset(i8*, i32, i64)