diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
index a85e04e..d8bcc59 100644
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -3851,6 +3851,14 @@
   LLT DstTy = MRI.getType(Dst);
   LLT SrcTy = MRI.getType(Src);
 
+  if (SrcTy == LLT::scalar(1)) {
+    auto True = MIRBuilder.buildFConstant(DstTy, 1.0);
+    auto False = MIRBuilder.buildFConstant(DstTy, 0.0);
+    MIRBuilder.buildSelect(Dst, Src, True, False);
+    MI.eraseFromParent();
+    return Legalized;
+  }
+
   if (SrcTy != LLT::scalar(64))
     return UnableToLegalize;
 
@@ -3876,6 +3884,14 @@
   const LLT S32 = LLT::scalar(32);
   const LLT S1 = LLT::scalar(1);
 
+  if (SrcTy == S1) {
+    auto True = MIRBuilder.buildFConstant(DstTy, -1.0);
+    auto False = MIRBuilder.buildFConstant(DstTy, 0.0);
+    MIRBuilder.buildSelect(Dst, Src, True, False);
+    MI.eraseFromParent();
+    return Legalized;
+  }
+
   if (SrcTy != S64)
     return UnableToLegalize;