Index: lib/Transforms/Utils/LoopUtils.cpp =================================================================== --- lib/Transforms/Utils/LoopUtils.cpp +++ lib/Transforms/Utils/LoopUtils.cpp @@ -450,6 +450,7 @@ return InstDesc(Kind == RK_IntegerOr, I); case Instruction::Xor: return InstDesc(Kind == RK_IntegerXor, I); + case Instruction::FDiv: case Instruction::FMul: return InstDesc(Kind == RK_FloatMult, I, UAI); case Instruction::FSub: Index: test/Transforms/LoopVectorize/float-reduction.ll =================================================================== --- test/Transforms/LoopVectorize/float-reduction.ll +++ test/Transforms/LoopVectorize/float-reduction.ll @@ -44,3 +44,25 @@ for.end: ; preds = %for.body ret float %sub } + +;CHECK-LABEL: @foodiv( +;CHECK: fdiv fast <4 x float> +;CHECK: ret +define float @foodiv(float* nocapture %A, i32* nocapture %n) nounwind uwtable readonly ssp { +entry: + br label %for.body + +for.body: ; preds = %for.body, %entry + %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] + %sum.04 = phi float [ 1.000000e+00, %entry ], [ %sub, %for.body ] + %arrayidx = getelementptr inbounds float, float* %A, i64 %indvars.iv + %0 = load float, float* %arrayidx, align 4 + %sub = fdiv fast float %sum.04, %0 + %indvars.iv.next = add i64 %indvars.iv, 1 + %lftr.wideiv = trunc i64 %indvars.iv.next to i32 + %exitcond = icmp eq i32 %lftr.wideiv, 200 + br i1 %exitcond, label %for.end, label %for.body + +for.end: ; preds = %for.body + ret float %sub +}