Allow the inverse transform x86_fp80 -> i80 (also

fires during the Ada build).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63731 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/VMCore/ConstantFold.cpp b/lib/VMCore/ConstantFold.cpp
index 5f7cbcd0b60b5cd50a664a1db2b47247372c66a6..ff4d897e54a8b945d1d49ff959a424f49452b943 100644 (file)
--- a/lib/VMCore/ConstantFold.cpp
+++ b/lib/VMCore/ConstantFold.cpp
@@ -161,17 +161,12 @@ static Constant *FoldBitCast(Constant *V, const Type *DestTy) {
     // Otherwise, can't fold this (vector?)
     return 0;
   }
-  
+
   // Handle ConstantFP input.
-  if (const ConstantFP *FP = dyn_cast<ConstantFP>(V)) {
+  if (const ConstantFP *FP = dyn_cast<ConstantFP>(V))
     // FP -> Integral.
-    if (DestTy == Type::Int32Ty) {
-      return ConstantInt::get(FP->getValueAPF().bitcastToAPInt());
-    } else {
-      assert(DestTy == Type::Int64Ty && "only support f32/f64 for now!");
-      return ConstantInt::get(FP->getValueAPF().bitcastToAPInt());
-    }
-  }
+    return ConstantInt::get(FP->getValueAPF().bitcastToAPInt());
+
   return 0;
 }
 

diff --git a/test/Transforms/InstCombine/2009-02-04-FPBitcast.ll b/test/Transforms/InstCombine/2009-02-04-FPBitcast.ll
index 4d7b70a1155635627e5698b3a0300a678a3a15b0..b08c9622502aaecb377b98574935f2a07c54f6a1 100644 (file)
--- a/test/Transforms/InstCombine/2009-02-04-FPBitcast.ll
+++ b/test/Transforms/InstCombine/2009-02-04-FPBitcast.ll
@@ -5,3 +5,8 @@ define x86_fp80 @cast() {
        %tmp = bitcast i80 0 to x86_fp80                ; <x86_fp80> [#uses=1]
        ret x86_fp80 %tmp
 }
+
+define i80 @invcast() {
+       %tmp = bitcast x86_fp80 0xK00000000000000000000 to i80          ; <i80> [#uses=1]
+       ret i80 %tmp
+}