forked from OSchip/llvm-project
instcombine: Migrate fprintf optimizations
This patch migrates the fprintf optimizations from the simplify-libcalls pass into the instcombine library call simplifier. llvm-svn: 168891
This commit is contained in:
Meador Inge
parent
30484fc704
commit
1009cecca0
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@ -81,19 +81,6 @@ public:
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} // End anonymous namespace.
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} // End anonymous namespace.
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//===----------------------------------------------------------------------===//
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// Helper Functions
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//===----------------------------------------------------------------------===//
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static bool CallHasFloatingPointArgument(const CallInst *CI) {
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for (CallInst::const_op_iterator it = CI->op_begin(), e = CI->op_end();
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it != e; ++it) {
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if ((*it)->getType()->isFloatingPointTy())
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return true;
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}
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return false;
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}
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namespace {
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namespace {
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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// Formatting and IO Optimizations
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// Formatting and IO Optimizations
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@ -160,84 +147,6 @@ struct FPutsOpt : public LibCallOptimization {
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}
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}
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};
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};
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//===---------------------------------------===//
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// 'fprintf' Optimizations
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struct FPrintFOpt : public LibCallOptimization {
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Value *OptimizeFixedFormatString(Function *Callee, CallInst *CI,
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IRBuilder<> &B) {
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// All the optimizations depend on the format string.
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StringRef FormatStr;
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if (!getConstantStringInfo(CI->getArgOperand(1), FormatStr))
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return 0;
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// fprintf(F, "foo") --> fwrite("foo", 3, 1, F)
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if (CI->getNumArgOperands() == 2) {
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for (unsigned i = 0, e = FormatStr.size(); i != e; ++i)
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if (FormatStr[i] == '%') // Could handle %% -> % if we cared.
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return 0; // We found a format specifier.
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// These optimizations require DataLayout.
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if (!TD) return 0;
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Value *NewCI = EmitFWrite(CI->getArgOperand(1),
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ConstantInt::get(TD->getIntPtrType(*Context),
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FormatStr.size()),
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CI->getArgOperand(0), B, TD, TLI);
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return NewCI ? ConstantInt::get(CI->getType(), FormatStr.size()) : 0;
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}
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// The remaining optimizations require the format string to be "%s" or "%c"
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// and have an extra operand.
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if (FormatStr.size() != 2 || FormatStr[0] != '%' ||
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CI->getNumArgOperands() < 3)
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return 0;
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// Decode the second character of the format string.
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if (FormatStr[1] == 'c') {
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// fprintf(F, "%c", chr) --> fputc(chr, F)
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if (!CI->getArgOperand(2)->getType()->isIntegerTy()) return 0;
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Value *NewCI = EmitFPutC(CI->getArgOperand(2), CI->getArgOperand(0), B,
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TD, TLI);
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return NewCI ? ConstantInt::get(CI->getType(), 1) : 0;
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}
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if (FormatStr[1] == 's') {
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// fprintf(F, "%s", str) --> fputs(str, F)
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if (!CI->getArgOperand(2)->getType()->isPointerTy() || !CI->use_empty())
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return 0;
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return EmitFPutS(CI->getArgOperand(2), CI->getArgOperand(0), B, TD, TLI);
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}
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return 0;
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}
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virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
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// Require two fixed paramters as pointers and integer result.
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FunctionType *FT = Callee->getFunctionType();
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if (FT->getNumParams() != 2 || !FT->getParamType(0)->isPointerTy() ||
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!FT->getParamType(1)->isPointerTy() ||
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!FT->getReturnType()->isIntegerTy())
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return 0;
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if (Value *V = OptimizeFixedFormatString(Callee, CI, B)) {
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return V;
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}
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// fprintf(stream, format, ...) -> fiprintf(stream, format, ...) if no
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// floating point arguments.
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if (TLI->has(LibFunc::fiprintf) && !CallHasFloatingPointArgument(CI)) {
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Module *M = B.GetInsertBlock()->getParent()->getParent();
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Constant *FIPrintFFn =
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M->getOrInsertFunction("fiprintf", FT, Callee->getAttributes());
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CallInst *New = cast<CallInst>(CI->clone());
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New->setCalledFunction(FIPrintFFn);
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B.Insert(New);
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return New;
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}
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return 0;
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}
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};
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//===---------------------------------------===//
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//===---------------------------------------===//
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// 'puts' Optimizations
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// 'puts' Optimizations
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@ -280,7 +189,7 @@ namespace {
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StringMap<LibCallOptimization*> Optimizations;
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StringMap<LibCallOptimization*> Optimizations;
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// Formatting and IO Optimizations
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// Formatting and IO Optimizations
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FWriteOpt FWrite; FPutsOpt FPuts; FPrintFOpt FPrintF;
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FWriteOpt FWrite; FPutsOpt FPuts;
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PutsOpt Puts;
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PutsOpt Puts;
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bool Modified; // This is only used by doInitialization.
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bool Modified; // This is only used by doInitialization.
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@ -339,7 +248,6 @@ void SimplifyLibCalls::InitOptimizations() {
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// Formatting and IO Optimizations
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// Formatting and IO Optimizations
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AddOpt(LibFunc::fwrite, &FWrite);
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AddOpt(LibFunc::fwrite, &FWrite);
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AddOpt(LibFunc::fputs, &FPuts);
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AddOpt(LibFunc::fputs, &FPuts);
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Optimizations["fprintf"] = &FPrintF;
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Optimizations["puts"] = &Puts;
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Optimizations["puts"] = &Puts;
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}
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}
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@ -1502,6 +1502,81 @@ struct SPrintFOpt : public LibCallOptimization {
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}
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}
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};
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};
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struct FPrintFOpt : public LibCallOptimization {
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Value *optimizeFixedFormatString(Function *Callee, CallInst *CI,
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IRBuilder<> &B) {
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// All the optimizations depend on the format string.
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StringRef FormatStr;
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if (!getConstantStringInfo(CI->getArgOperand(1), FormatStr))
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return 0;
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// fprintf(F, "foo") --> fwrite("foo", 3, 1, F)
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if (CI->getNumArgOperands() == 2) {
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for (unsigned i = 0, e = FormatStr.size(); i != e; ++i)
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if (FormatStr[i] == '%') // Could handle %% -> % if we cared.
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return 0; // We found a format specifier.
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// These optimizations require DataLayout.
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if (!TD) return 0;
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Value *NewCI = EmitFWrite(CI->getArgOperand(1),
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ConstantInt::get(TD->getIntPtrType(*Context),
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FormatStr.size()),
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CI->getArgOperand(0), B, TD, TLI);
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return NewCI ? ConstantInt::get(CI->getType(), FormatStr.size()) : 0;
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}
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// The remaining optimizations require the format string to be "%s" or "%c"
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// and have an extra operand.
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if (FormatStr.size() != 2 || FormatStr[0] != '%' ||
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CI->getNumArgOperands() < 3)
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return 0;
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// Decode the second character of the format string.
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if (FormatStr[1] == 'c') {
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// fprintf(F, "%c", chr) --> fputc(chr, F)
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if (!CI->getArgOperand(2)->getType()->isIntegerTy()) return 0;
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Value *NewCI = EmitFPutC(CI->getArgOperand(2), CI->getArgOperand(0), B,
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TD, TLI);
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return NewCI ? ConstantInt::get(CI->getType(), 1) : 0;
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}
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if (FormatStr[1] == 's') {
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// fprintf(F, "%s", str) --> fputs(str, F)
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if (!CI->getArgOperand(2)->getType()->isPointerTy() || !CI->use_empty())
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return 0;
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return EmitFPutS(CI->getArgOperand(2), CI->getArgOperand(0), B, TD, TLI);
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}
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return 0;
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}
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virtual Value *callOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
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// Require two fixed paramters as pointers and integer result.
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FunctionType *FT = Callee->getFunctionType();
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if (FT->getNumParams() != 2 || !FT->getParamType(0)->isPointerTy() ||
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!FT->getParamType(1)->isPointerTy() ||
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!FT->getReturnType()->isIntegerTy())
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return 0;
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if (Value *V = optimizeFixedFormatString(Callee, CI, B)) {
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return V;
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}
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// fprintf(stream, format, ...) -> fiprintf(stream, format, ...) if no
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// floating point arguments.
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if (TLI->has(LibFunc::fiprintf) && !callHasFloatingPointArgument(CI)) {
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Module *M = B.GetInsertBlock()->getParent()->getParent();
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Constant *FIPrintFFn =
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M->getOrInsertFunction("fiprintf", FT, Callee->getAttributes());
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CallInst *New = cast<CallInst>(CI->clone());
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New->setCalledFunction(FIPrintFFn);
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B.Insert(New);
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return New;
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}
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return 0;
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}
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};
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} // End anonymous namespace.
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} // End anonymous namespace.
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namespace llvm {
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namespace llvm {
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@ -1558,6 +1633,7 @@ class LibCallSimplifierImpl {
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// Formatting and IO library call optimizations.
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// Formatting and IO library call optimizations.
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PrintFOpt PrintF;
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PrintFOpt PrintF;
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SPrintFOpt SPrintF;
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SPrintFOpt SPrintF;
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FPrintFOpt FPrintF;
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void initOptimizations();
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void initOptimizations();
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void addOpt(LibFunc::Func F, LibCallOptimization* Opt);
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void addOpt(LibFunc::Func F, LibCallOptimization* Opt);
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@ -1683,6 +1759,7 @@ void LibCallSimplifierImpl::initOptimizations() {
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// Formatting and IO library call optimizations.
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// Formatting and IO library call optimizations.
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addOpt(LibFunc::printf, &PrintF);
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addOpt(LibFunc::printf, &PrintF);
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addOpt(LibFunc::sprintf, &SPrintF);
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addOpt(LibFunc::sprintf, &SPrintF);
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addOpt(LibFunc::fprintf, &FPrintF);
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}
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}
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Value *LibCallSimplifierImpl::optimizeCall(CallInst *CI) {
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Value *LibCallSimplifierImpl::optimizeCall(CallInst *CI) {
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@ -0,0 +1,79 @@
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; Test that the fprintf library call simplifier works correctly.
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;
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; RUN: opt < %s -instcombine -S | FileCheck %s
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; RUN: opt < %s -mtriple xcore-xmos-elf -instcombine -S | FileCheck %s -check-prefix=IPRINTF
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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"
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%FILE = type { }
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@hello_world = constant [13 x i8] c"hello world\0A\00"
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@percent_c = constant [3 x i8] c"%c\00"
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@percent_d = constant [3 x i8] c"%d\00"
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@percent_f = constant [3 x i8] c"%f\00"
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@percent_s = constant [3 x i8] c"%s\00"
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declare i32 @fprintf(%FILE*, i8*, ...)
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; Check fprintf(fp, "foo") -> fwrite("foo", 3, 1, fp).
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define void @test_simplify1(%FILE* %fp) {
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; CHECK: @test_simplify1
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%fmt = getelementptr [13 x i8]* @hello_world, i32 0, i32 0
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call i32 (%FILE*, i8*, ...)* @fprintf(%FILE* %fp, i8* %fmt)
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; CHECK-NEXT: call i32 @fwrite(i8* getelementptr inbounds ([13 x i8]* @hello_world, i32 0, i32 0), i32 12, i32 1, %FILE* %fp)
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ret void
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; CHECK-NEXT: ret void
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}
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; Check fprintf(fp, "%c", chr) -> fputc(chr, fp).
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define void @test_simplify2(%FILE* %fp) {
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; CHECK: @test_simplify2
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%fmt = getelementptr [3 x i8]* @percent_c, i32 0, i32 0
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call i32 (%FILE*, i8*, ...)* @fprintf(%FILE* %fp, i8* %fmt, i8 104)
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; CHECK-NEXT: call i32 @fputc(i32 104, %FILE* %fp)
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ret void
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; CHECK-NEXT: ret void
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}
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; Check fprintf(fp, "%s", str) -> fputs(str, fp).
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define void @test_simplify3(%FILE* %fp) {
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; CHECK: @test_simplify3
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%fmt = getelementptr [3 x i8]* @percent_s, i32 0, i32 0
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%str = getelementptr [13 x i8]* @hello_world, i32 0, i32 0
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call i32 (%FILE*, i8*, ...)* @fprintf(%FILE* %fp, i8* %fmt, i8* %str)
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; CHECK-NEXT: call i32 @fputs(i8* getelementptr inbounds ([13 x i8]* @hello_world, i32 0, i32 0), %FILE* %fp)
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ret void
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; CHECK-NEXT: ret void
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}
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; Check fprintf(fp, fmt, ...) -> fiprintf(fp, fmt, ...) if no floating point.
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define void @test_simplify4(%FILE* %fp) {
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; CHECK-IPRINTF: @test_simplify4
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%fmt = getelementptr [3 x i8]* @percent_d, i32 0, i32 0
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call i32 (%FILE*, i8*, ...)* @fprintf(%FILE* %fp, i8* %fmt, i32 187)
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; CHECK-NEXT-IPRINTF: call i32 (%FILE*, i8*, ...)* @fiprintf(%FILE* %fp, i8* getelementptr inbounds ([3 x i8]* @percent_d, i32 0, i32 0), i32 187)
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ret void
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; CHECK-NEXT-IPRINTF: ret void
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}
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define void @test_no_simplify1(%FILE* %fp) {
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; CHECK-IPRINTF: @test_no_simplify1
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%fmt = getelementptr [3 x i8]* @percent_f, i32 0, i32 0
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call i32 (%FILE*, i8*, ...)* @fprintf(%FILE* %fp, i8* %fmt, double 1.87)
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; CHECK-NEXT-IPRINTF: call i32 (%FILE*, i8*, ...)* @fprintf(%FILE* %fp, i8* getelementptr inbounds ([3 x i8]* @percent_f, i32 0, i32 0), double 1.870000e+00)
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ret void
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; CHECK-NEXT-IPRINTF: ret void
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}
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define void @test_no_simplify2(%FILE* %fp, double %d) {
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; CHECK: @test_no_simplify2
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%fmt = getelementptr [3 x i8]* @percent_f, i32 0, i32 0
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call i32 (%FILE*, i8*, ...)* @fprintf(%FILE* %fp, i8* %fmt, double %d)
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; CHECK-NEXT: call i32 (%FILE*, i8*, ...)* @fprintf(%FILE* %fp, i8* getelementptr inbounds ([3 x i8]* @percent_f, i32 0, i32 0), double %d)
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ret void
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; CHECK-NEXT: ret void
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}
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@ -1,4 +1,4 @@
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; RUN: opt < %s -simplify-libcalls -S | FileCheck %s
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; RUN: opt < %s -instcombine -S | FileCheck %s
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; <rdar://problem/9815881>
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; <rdar://problem/9815881>
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; On OSX x86-32, fwrite and fputs aren't called fwrite and fputs.
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; On OSX x86-32, fwrite and fputs aren't called fwrite and fputs.
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; Make sure we use the correct names.
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; Make sure we use the correct names.
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@ -1,29 +0,0 @@
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; Test that the FPrintFOptimizer works correctly
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; RUN: opt < %s -simplify-libcalls -S | FileCheck %s
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; This transformation requires the pointer size, as it assumes that size_t is
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; the size of a pointer.
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target datalayout = "p:64:64:64"
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%struct._IO_FILE = type { i32, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, %struct._IO_marker*, %struct._IO_FILE*, i32, i32, i32, i16, i8, [1 x i8], i8*, i64, i8*, i8*, i32, [52 x i8] }
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%struct._IO_marker = type { %struct._IO_marker*, %struct._IO_FILE*, i32 }
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@str = constant [3 x i8] c"%s\00" ; <[3 x i8]*> [#uses=1]
|
|
||||||
@chr = constant [3 x i8] c"%c\00" ; <[3 x i8]*> [#uses=1]
|
|
||||||
@hello = constant [13 x i8] c"hello world\0A\00" ; <[13 x i8]*> [#uses=1]
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|
||||||
@stdout = external global %struct._IO_FILE* ; <%struct._IO_FILE**> [#uses=3]
|
|
||||||
|
|
||||||
declare i32 @fprintf(%struct._IO_FILE*, i8*, ...)
|
|
||||||
|
|
||||||
; CHECK: define i32 @foo() {
|
|
||||||
define i32 @foo() {
|
|
||||||
entry:
|
|
||||||
%tmp.1 = load %struct._IO_FILE** @stdout ; <%struct._IO_FILE*> [#uses=1]
|
|
||||||
%tmp.0 = call i32 (%struct._IO_FILE*, i8*, ...)* @fprintf( %struct._IO_FILE* %tmp.1, i8* getelementptr ([13 x i8]* @hello, i32 0, i32 0) ) ; <i32> [#uses=0]
|
|
||||||
%tmp.4 = load %struct._IO_FILE** @stdout ; <%struct._IO_FILE*> [#uses=1]
|
|
||||||
%tmp.3 = call i32 (%struct._IO_FILE*, i8*, ...)* @fprintf( %struct._IO_FILE* %tmp.4, i8* getelementptr ([3 x i8]* @str, i32 0, i32 0), i8* getelementptr ([13 x i8]* @hello, i32 0, i32 0) ) ; <i32> [#uses=0]
|
|
||||||
%tmp.8 = load %struct._IO_FILE** @stdout ; <%struct._IO_FILE*> [#uses=1]
|
|
||||||
%tmp.7 = call i32 (%struct._IO_FILE*, i8*, ...)* @fprintf( %struct._IO_FILE* %tmp.8, i8* getelementptr ([3 x i8]* @chr, i32 0, i32 0), i32 33 ) ; <i32> [#uses=0]
|
|
||||||
ret i32 0
|
|
||||||
|
|
||||||
; CHECK-NOT: @fprintf(
|
|
||||||
}
|
|
||||||
|
|
@ -1,29 +0,0 @@
|
||||||
; RUN: opt < %s -simplify-libcalls -S -o %t
|
|
||||||
; RUN: FileCheck < %t %s
|
|
||||||
target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:64:64-v128:128:128-a0:0:32"
|
|
||||||
target triple = "xcore-xmos-elf"
|
|
||||||
|
|
||||||
@.str = internal constant [4 x i8] c"%f\0A\00" ; <[4 x i8]*> [#uses=1]
|
|
||||||
@.str1 = internal constant [4 x i8] c"%d\0A\00" ; <[4 x i8]*> [#uses=1]
|
|
||||||
|
|
||||||
; Verify fprintf with no floating point arguments is transformed to fiprintf
|
|
||||||
define i32 @f4(i8* %p, i32 %x) nounwind {
|
|
||||||
entry:
|
|
||||||
; CHECK: define i32 @f4
|
|
||||||
; CHECK: @fiprintf
|
|
||||||
; CHECK: }
|
|
||||||
%0 = tail call i32 (i8*, i8*, ...)* @fprintf(i8 *%p, i8* getelementptr ([4 x i8]* @.str1, i32 0, i32 0), i32 %x)
|
|
||||||
ret i32 %0
|
|
||||||
}
|
|
||||||
|
|
||||||
; Verify we don't turn this into an fiprintf call
|
|
||||||
define i32 @f5(i8* %p, double %x) nounwind {
|
|
||||||
entry:
|
|
||||||
; CHECK: define i32 @f5
|
|
||||||
; CHECK: @fprintf
|
|
||||||
; CHECK: }
|
|
||||||
%0 = tail call i32 (i8*, i8*, ...)* @fprintf(i8 *%p, i8* getelementptr ([4 x i8]* @.str, i32 0, i32 0), double %x)
|
|
||||||
ret i32 %0
|
|
||||||
}
|
|
||||||
|
|
||||||
declare i32 @fprintf(i8* nocapture, i8* nocapture, ...) nounwind
|
|
||||||
Loading…
Reference in New Issue