instcombine: Migrate toascii optimizations

This patch migrates the toascii optimizations from the simplify-libcalls
pass into the instcombine library call simplifier.

llvm-svn: 168580

2 files changed, 16 insertions, 26 deletions

diff --git a/llvm/lib/Transforms/Scalar/SimplifyLibCalls.cpp b/llvm/lib/Transforms/Scalar/SimplifyLibCalls.cpp
index 64384debf6f..4db15a62d52 100644
--- a/llvm/lib/Transforms/Scalar/SimplifyLibCalls.cpp
+++ b/llvm/lib/Transforms/Scalar/SimplifyLibCalls.cpp
@@ -96,27 +96,6 @@ static bool CallHasFloatingPointArgument(const CallInst *CI) {
 
 namespace {
 //===----------------------------------------------------------------------===//
-// Integer Optimizations
-//===----------------------------------------------------------------------===//
-
-//===---------------------------------------===//
-// 'toascii' Optimizations
-
-struct ToAsciiOpt : public LibCallOptimization {
-  virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
-    FunctionType *FT = Callee->getFunctionType();
-    // We require i32(i32)
-    if (FT->getNumParams() != 1 || FT->getReturnType() != FT->getParamType(0) ||
-        !FT->getParamType(0)->isIntegerTy(32))
-      return 0;
-
-    // isascii(c) -> c & 0x7f
-    return B.CreateAnd(CI->getArgOperand(0),
-                       ConstantInt::get(CI->getType(),0x7F));
-  }
-};
-
-//===----------------------------------------------------------------------===//
 // Formatting and IO Optimizations
 //===----------------------------------------------------------------------===//
 
@@ -483,8 +462,6 @@ namespace {
     TargetLibraryInfo *TLI;
 
     StringMap<LibCallOptimization*> Optimizations;
-    // Integer Optimizations
-    ToAsciiOpt ToAscii;
     // Formatting and IO Optimizations
     SPrintFOpt SPrintF; PrintFOpt PrintF;
     FWriteOpt FWrite; FPutsOpt FPuts; FPrintFOpt FPrintF;
@@ -543,9 +520,6 @@ void SimplifyLibCalls::AddOpt(LibFunc::Func F1, LibFunc::Func F2,
 /// Optimizations - Populate the Optimizations map with all the optimizations
 /// we know.
 void SimplifyLibCalls::InitOptimizations() {
-  // Integer Optimizations
-  Optimizations["toascii"] = &ToAscii;
-
   // Formatting and IO Optimizations
   Optimizations["sprintf"] = &SPrintF;
   Optimizations["printf"] = &PrintF;
diff --git a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
index 2b390c191cc..27ccdc1095e 100644
--- a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
@@ -1298,6 +1298,20 @@ struct IsAsciiOpt : public LibCallOptimization {
   }
 };
 
+struct ToAsciiOpt : public LibCallOptimization {
+  virtual Value *callOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
+    FunctionType *FT = Callee->getFunctionType();
+    // We require i32(i32)
+    if (FT->getNumParams() != 1 || FT->getReturnType() != FT->getParamType(0) ||
+        !FT->getParamType(0)->isIntegerTy(32))
+      return 0;
+
+    // isascii(c) -> c & 0x7f
+    return B.CreateAnd(CI->getArgOperand(0),
+                       ConstantInt::get(CI->getType(),0x7F));
+  }
+};
+
 } // End anonymous namespace.
 
 namespace llvm {
@@ -1349,6 +1363,7 @@ class LibCallSimplifierImpl {
   AbsOpt Abs;
   IsDigitOpt IsDigit;
   IsAsciiOpt IsAscii;
+  ToAsciiOpt ToAscii;
 
   void initOptimizations();
   void addOpt(LibFunc::Func F, LibCallOptimization* Opt);
@@ -1469,6 +1484,7 @@ void LibCallSimplifierImpl::initOptimizations() {
   addOpt(LibFunc::llabs, &Abs);
   addOpt(LibFunc::isdigit, &IsDigit);
   addOpt(LibFunc::isascii, &IsAscii);
+  addOpt(LibFunc::toascii, &ToAscii);
 }
 
 Value *LibCallSimplifierImpl::optimizeCall(CallInst *CI) {