From 9cf328b526ae875054f273ccbf7f4c478277a62e Mon Sep 17 00:00:00 2001 From: Meador Inge Date: Sun, 11 Nov 2012 06:22:40 +0000 Subject: [PATCH] instcombine: Migrate memmove optimizations This patch migrates the memmove optimizations from the simplify-libcalls pass into the instcombine library call simplifier. llvm-svn: 167687 --- llvm/lib/Transforms/Scalar/SimplifyLibCalls.cpp | 25 +----------------------- llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp | 21 ++++++++++++++++++++ llvm/test/Transforms/InstCombine/memmove-1.ll | 17 ++++++++++++++++ llvm/test/Transforms/InstCombine/memmove-2.ll | 17 ++++++++++++++++ llvm/test/Transforms/SimplifyLibCalls/memmove.ll | 12 ------------ 5 files changed, 56 insertions(+), 36 deletions(-) create mode 100644 llvm/test/Transforms/InstCombine/memmove-1.ll create mode 100644 llvm/test/Transforms/InstCombine/memmove-2.ll delete mode 100644 llvm/test/Transforms/SimplifyLibCalls/memmove.ll diff --git a/llvm/lib/Transforms/Scalar/SimplifyLibCalls.cpp b/llvm/lib/Transforms/Scalar/SimplifyLibCalls.cpp index f63b679..40dce65 100644 --- a/llvm/lib/Transforms/Scalar/SimplifyLibCalls.cpp +++ b/llvm/lib/Transforms/Scalar/SimplifyLibCalls.cpp @@ -105,28 +105,6 @@ static bool CallHasFloatingPointArgument(const CallInst *CI) { namespace { //===---------------------------------------===// -// 'memmove' Optimizations - -struct MemMoveOpt : public LibCallOptimization { - virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { - // These optimizations require DataLayout. - if (!TD) return 0; - - FunctionType *FT = Callee->getFunctionType(); - if (FT->getNumParams() != 3 || FT->getReturnType() != FT->getParamType(0) || - !FT->getParamType(0)->isPointerTy() || - !FT->getParamType(1)->isPointerTy() || - FT->getParamType(2) != TD->getIntPtrType(*Context)) - return 0; - - // memmove(x, y, n) -> llvm.memmove(x, y, n, 1) - B.CreateMemMove(CI->getArgOperand(0), CI->getArgOperand(1), - CI->getArgOperand(2), 1); - return CI->getArgOperand(0); - } -}; - -//===---------------------------------------===// // 'memset' Optimizations struct MemSetOpt : public LibCallOptimization { @@ -817,7 +795,7 @@ namespace { StringMap Optimizations; // Memory LibCall Optimizations - MemMoveOpt MemMove; MemSetOpt MemSet; + MemSetOpt MemSet; // Math Library Optimizations CosOpt Cos; PowOpt Pow; Exp2Opt Exp2; UnaryDoubleFPOpt UnaryDoubleFP, UnsafeUnaryDoubleFP; @@ -884,7 +862,6 @@ void SimplifyLibCalls::AddOpt(LibFunc::Func F1, LibFunc::Func F2, /// we know. void SimplifyLibCalls::InitOptimizations() { // Memory LibCall Optimizations - Optimizations["memmove"] = &MemMove; AddOpt(LibFunc::memset, &MemSet); // Math Library Optimizations diff --git a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp index c57991b..b4dc93d 100644 --- a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp +++ b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp @@ -978,6 +978,25 @@ struct MemCpyOpt : public LibCallOptimization { } }; +struct MemMoveOpt : public LibCallOptimization { + virtual Value *callOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { + // These optimizations require DataLayout. + if (!TD) return 0; + + FunctionType *FT = Callee->getFunctionType(); + if (FT->getNumParams() != 3 || FT->getReturnType() != FT->getParamType(0) || + !FT->getParamType(0)->isPointerTy() || + !FT->getParamType(1)->isPointerTy() || + FT->getParamType(2) != TD->getIntPtrType(*Context)) + return 0; + + // memmove(x, y, n) -> llvm.memmove(x, y, n, 1) + B.CreateMemMove(CI->getArgOperand(0), CI->getArgOperand(1), + CI->getArgOperand(2), 1); + return CI->getArgOperand(0); + } +}; + } // End anonymous namespace. namespace llvm { @@ -1016,6 +1035,7 @@ class LibCallSimplifierImpl { // Memory library call optimizations. MemCmpOpt MemCmp; MemCpyOpt MemCpy; + MemMoveOpt MemMove; void initOptimizations(); void addOpt(LibFunc::Func F, LibCallOptimization* Opt); @@ -1066,6 +1086,7 @@ void LibCallSimplifierImpl::initOptimizations() { // Memory library call optimizations. addOpt(LibFunc::memcmp, &MemCmp); addOpt(LibFunc::memcpy, &MemCpy); + addOpt(LibFunc::memmove, &MemMove); } Value *LibCallSimplifierImpl::optimizeCall(CallInst *CI) { diff --git a/llvm/test/Transforms/InstCombine/memmove-1.ll b/llvm/test/Transforms/InstCombine/memmove-1.ll new file mode 100644 index 0000000..53f2f11 --- /dev/null +++ b/llvm/test/Transforms/InstCombine/memmove-1.ll @@ -0,0 +1,17 @@ +; Test that the memmove library call simplifier works correctly. +; +; RUN: opt < %s -instcombine -S | FileCheck %s + +target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" + +declare i8* @memmove(i8*, i8*, i32) + +; Check memmove(mem1, mem2, size) -> llvm.memmove(mem1, mem2, size, 1). + +define i8* @test_simplify1(i8* %mem1, i8* %mem2, i32 %size) { +; CHECK: @test_simplify1 + %ret = call i8* @memmove(i8* %mem1, i8* %mem2, i32 %size) +; CHECK: call void @llvm.memmove + ret i8* %ret +; CHECK: ret i8* %mem1 +} diff --git a/llvm/test/Transforms/InstCombine/memmove-2.ll b/llvm/test/Transforms/InstCombine/memmove-2.ll new file mode 100644 index 0000000..23887bc --- /dev/null +++ b/llvm/test/Transforms/InstCombine/memmove-2.ll @@ -0,0 +1,17 @@ +; Test that the memmove library call simplifier works correctly. +; +; RUN: opt < %s -instcombine -S | FileCheck %s + +target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" + +declare i8 @memmove(i8*, i8*, i32) + +; Check that memmove functions with the wrong prototype aren't simplified. + +define i8 @test_no_simplify1(i8* %mem1, i8* %mem2, i32 %size) { +; CHECK: @test_no_simplify1 + %ret = call i8 @memmove(i8* %mem1, i8* %mem2, i32 %size) +; CHECK: call i8 @memmove + ret i8 %ret +; CHECK: ret i8 %ret +} diff --git a/llvm/test/Transforms/SimplifyLibCalls/memmove.ll b/llvm/test/Transforms/SimplifyLibCalls/memmove.ll deleted file mode 100644 index 5aaeeeb..0000000 --- a/llvm/test/Transforms/SimplifyLibCalls/memmove.ll +++ /dev/null @@ -1,12 +0,0 @@ -; RUN: opt < %s -simplify-libcalls -S | grep "llvm.memmove" -target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32" -target triple = "i686-pc-linux-gnu" - -define i8* @test(i8* %a, i8* %b, i32 %x) { -entry: - %call = call i8* @memmove(i8* %a, i8* %b, i32 %x ) - ret i8* %call -} - -declare i8* @memmove(i8*,i8*,i32) - -- 2.7.4