1 files changed, 8 insertions, 8 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp
index 0b93799..4ec1af3 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp
@@ -1852,15 +1852,13 @@ Instruction *InstCombinerImpl::visitFPTrunc(FPTruncInst &FPT) {
   Value *X;
   Instruction *Op = dyn_cast<Instruction>(FPT.getOperand(0));
   if (Op && Op->hasOneUse()) {
-    IRBuilder<>::FastMathFlagGuard FMFG(Builder);
     FastMathFlags FMF = FPT.getFastMathFlags();
     if (auto *FPMO = dyn_cast<FPMathOperator>(Op))
       FMF &= FPMO->getFastMathFlags();
-    Builder.setFastMathFlags(FMF);
 
     if (match(Op, m_FNeg(m_Value(X)))) {
-      Value *InnerTrunc = Builder.CreateFPTrunc(X, Ty);
-      Value *Neg = Builder.CreateFNeg(InnerTrunc);
+      Value *InnerTrunc = Builder.CreateFPTruncFMF(X, Ty, FMF);
+      Value *Neg = Builder.CreateFNegFMF(InnerTrunc, FMF);
       return replaceInstUsesWith(FPT, Neg);
     }
 
@@ -1870,15 +1868,17 @@ Instruction *InstCombinerImpl::visitFPTrunc(FPTruncInst &FPT) {
     if (match(Op, m_Select(m_Value(Cond), m_FPExt(m_Value(X)), m_Value(Y))) &&
         X->getType() == Ty) {
       // fptrunc (select Cond, (fpext X), Y --> select Cond, X, (fptrunc Y)
-      Value *NarrowY = Builder.CreateFPTrunc(Y, Ty);
-      Value *Sel = Builder.CreateSelect(Cond, X, NarrowY, "narrow.sel", Op);
+      Value *NarrowY = Builder.CreateFPTruncFMF(Y, Ty, FMF);
+      Value *Sel =
+          Builder.CreateSelectFMF(Cond, X, NarrowY, FMF, "narrow.sel", Op);
       return replaceInstUsesWith(FPT, Sel);
     }
     if (match(Op, m_Select(m_Value(Cond), m_Value(Y), m_FPExt(m_Value(X)))) &&
         X->getType() == Ty) {
       // fptrunc (select Cond, Y, (fpext X) --> select Cond, (fptrunc Y), X
-      Value *NarrowY = Builder.CreateFPTrunc(Y, Ty);
-      Value *Sel = Builder.CreateSelect(Cond, NarrowY, X, "narrow.sel", Op);
+      Value *NarrowY = Builder.CreateFPTruncFMF(Y, Ty, FMF);
+      Value *Sel =
+          Builder.CreateSelectFMF(Cond, NarrowY, X, FMF, "narrow.sel", Op);
       return replaceInstUsesWith(FPT, Sel);
     }
   }