diff --git a/llvm/lib/IR/Instructions.cpp b/llvm/lib/IR/Instructions.cpp
index 7615a4dcc49821..1b546ce3a3a047 100644
--- a/llvm/lib/IR/Instructions.cpp
+++ b/llvm/lib/IR/Instructions.cpp
@@ -3088,16 +3088,18 @@ unsigned CastInst::isEliminableCastPair(
       return 0;
     }
     case 8: {
-      // ext, trunc -> bitcast,    if the SrcTy and DstTy are same size
+      // ext, trunc -> bitcast,    if the SrcTy and DstTy are the same
       // ext, trunc -> ext,        if sizeof(SrcTy) < sizeof(DstTy)
       // ext, trunc -> trunc,      if sizeof(SrcTy) > sizeof(DstTy)
       unsigned SrcSize = SrcTy->getScalarSizeInBits();
       unsigned DstSize = DstTy->getScalarSizeInBits();
-      if (SrcSize == DstSize)
+      if (SrcTy == DstTy)
         return Instruction::BitCast;
-      else if (SrcSize < DstSize)
+      if (SrcSize < DstSize)
         return firstOp;
-      return secondOp;
+      if (SrcSize > DstSize)
+        return secondOp;
+      return 0;
     }
     case 9:
       // zext, sext -> zext, because sext can't sign extend after zext
diff --git a/llvm/test/Transforms/InstCombine/fpextend.ll b/llvm/test/Transforms/InstCombine/fpextend.ll
index 13784c69c36ba7..c991f5d8c95784 100644
--- a/llvm/test/Transforms/InstCombine/fpextend.ll
+++ b/llvm/test/Transforms/InstCombine/fpextend.ll
@@ -429,3 +429,14 @@ define double @FtoItoFtoF_f32_su32_f32_f64(float %f) {
   %r = fpext float %x to double
   ret double %r
 }
+
+define half @bf16_to_f32_to_f16(bfloat %a) nounwind {
+; CHECK-LABEL: @bf16_to_f32_to_f16(
+; CHECK-NEXT:    [[Y:%.*]] = fpext bfloat [[A:%.*]] to float
+; CHECK-NEXT:    [[Z:%.*]] = fptrunc float [[Y]] to half
+; CHECK-NEXT:    ret half [[Z]]
+;
+  %y = fpext bfloat %a to float
+  %z = fptrunc float %y to half
+  ret half %z
+}