From 8ecdbb15eeb58926a26990856a1d603a040badf6 Mon Sep 17 00:00:00 2001 From: Nikita Popov Date: Mon, 25 Nov 2024 11:20:10 +0100 Subject: [PATCH] [InstCombine] Remove SPF guard for trunc transforms This shouldn't be necessary anymore now that SPF patterns are canonicalized to intrinsics. --- llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp | 9 --------- 1 file changed, 9 deletions(-) diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp index 6c2554ea73b7f..7221c987b9821 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp @@ -786,15 +786,6 @@ Instruction *InstCombinerImpl::visitTrunc(TruncInst &Trunc) { } } - // Test if the trunc is the user of a select which is part of a - // minimum or maximum operation. If so, don't do any more simplification. - // Even simplifying demanded bits can break the canonical form of a - // min/max. - Value *LHS, *RHS; - if (SelectInst *Sel = dyn_cast(Src)) - if (matchSelectPattern(Sel, LHS, RHS).Flavor != SPF_UNKNOWN) - return nullptr; - // See if we can simplify any instructions used by the input whose sole // purpose is to compute bits we don't care about. if (SimplifyDemandedInstructionBits(Trunc))