[PATCH][Interpreter] Add missing FP intrinsic lowering.

[jklontz]

Summary

This extends the work done in [1], adding missing intrinsic lowering for floor, trunc, round and copysign.

[1] http://comments.gmane.org/gmane.comp.compilers.llvm.cvs/199372

[dexonsmith]

LGTM.

[jklontz]

Closed by commit rL216827 (authored by @jklontz).

llvm/trunk/lib/CodeGen/IntrinsicLowering.cpp

void IntrinsicLowering::LowerIntrinsicCall(CallInst *CI) {
   case Intrinsic::sin: {
     ReplaceFPIntrinsicWithCall(CI, "sinf", "sin", "sinl");
     break;
   }
   case Intrinsic::cos: {
     ReplaceFPIntrinsicWithCall(CI, "cosf", "cos", "cosl");
     break;
   }
+  case Intrinsic::floor: {
+    ReplaceFPIntrinsicWithCall(CI, "floorf", "floor", "floorl");
+    break;
+  }
   case Intrinsic::ceil: {
     ReplaceFPIntrinsicWithCall(CI, "ceilf", "ceil", "ceill");
     break;
   }
+  case Intrinsic::trunc: {
+    ReplaceFPIntrinsicWithCall(CI, "truncf", "trunc", "truncl");
+    break;
+  }
+  case Intrinsic::round: {
+    ReplaceFPIntrinsicWithCall(CI, "roundf", "round", "roundl");
+    break;
+  }
+  case Intrinsic::copysign: {
+    ReplaceFPIntrinsicWithCall(CI, "copysignf", "copysign", "copysignl");
+    break;
+  }
   case Intrinsic::flt_rounds:
      // Lower to "round to the nearest"
      if (!CI->getType()->isVoidTy())
        CI->replaceAllUsesWith(ConstantInt::get(CI->getType(), 1));
      break;
   case Intrinsic::invariant_start:
   case Intrinsic::lifetime_start:
     // Discard region information.

llvm/trunk/test/ExecutionEngine/Interpreter/intrinsics.ll

 ; RUN: lli -O0 -force-interpreter < %s
 
 ; libffi does not support fp128 so we don’t test it
 declare float  @llvm.sin.f32(float)
 declare double @llvm.sin.f64(double)
 declare float  @llvm.cos.f32(float)
 declare double @llvm.cos.f64(double)
+declare float  @llvm.floor.f32(float)
+declare double @llvm.floor.f64(double)
 declare float  @llvm.ceil.f32(float)
 declare double @llvm.ceil.f64(double)
+declare float  @llvm.trunc.f32(float)
+declare double @llvm.trunc.f64(double)
+declare float  @llvm.round.f32(float)
+declare double @llvm.round.f64(double)
+declare float  @llvm.copysign.f32(float, float)
+declare double @llvm.copysign.f64(double, double)
 
 define i32 @main() {
   %sin32 = call float @llvm.sin.f32(float 0.000000e+00)
   %sin64 = call double @llvm.sin.f64(double 0.000000e+00)
   %cos32 = call float @llvm.cos.f32(float 0.000000e+00)
   %cos64 = call double @llvm.cos.f64(double 0.000000e+00)
+  %floor32 = call float @llvm.floor.f32(float 0.000000e+00)
+  %floor64 = call double @llvm.floor.f64(double 0.000000e+00)
   %ceil32 = call float @llvm.ceil.f32(float 0.000000e+00)
   %ceil64 = call double @llvm.ceil.f64(double 0.000000e+00)
+  %trunc32 = call float @llvm.trunc.f32(float 0.000000e+00)
+  %trunc64 = call double @llvm.trunc.f64(double 0.000000e+00)
+  %round32 = call float @llvm.round.f32(float 0.000000e+00)
+  %round64 = call double @llvm.round.f64(double 0.000000e+00)
+  %copysign32 = call float @llvm.copysign.f32(float 0.000000e+00, float 0.000000e+00)
+  %copysign64 = call double @llvm.copysign.f64(double 0.000000e+00, double 0.000000e+00)
   ret i32 0
 }