Fix assert when emitting llvm.pow.f86.

[oota-llvm.git] / lib / Target / Sparc / SparcISelLowering.cpp

diff --git a/lib/Target/Sparc/SparcISelLowering.cpp b/lib/Target/Sparc/SparcISelLowering.cpp
index 9c8a0a645253e325e621b449bac1b0f84307542d..ef2806474a08e74ea772a2859e3021694f6afc07 100644 (file)
--- a/lib/Target/Sparc/SparcISelLowering.cpp
+++ b/lib/Target/Sparc/SparcISelLowering.cpp
@@ -854,11 +854,10 @@ SparcTargetLowering::LowerCall_32(TargetLowering::CallLoweringInfo &CLI,
         // Move from the float value from float registers into the
         // integer registers.
 
         // Move from the float value from float registers into the
         // integer registers.
 

-        // TODO: this conversion is done in two steps, because
-        // f64->i64 conversion is done efficiently, and i64->v2i32 is
-        // basically a no-op. But f64->v2i32 is NOT done efficiently
-        // for some reason.
-        Arg = DAG.getNode(ISD::BITCAST, dl, MVT::i64, Arg);
+        // TODO: The f64 -> v2i32 conversion is super-inefficient for
+        // constants: it sticks them in the constant pool, then loads
+        // to a fp register, then stores to temp memory, then loads to
+        // integer registers.

         Arg = DAG.getNode(ISD::BITCAST, dl, MVT::v2i32, Arg);
       }
 
         Arg = DAG.getNode(ISD::BITCAST, dl, MVT::v2i32, Arg);
       }