1 ; RUN: opt < %s -instcombine -S | grep shufflevector 2 ; PR2645 3 4 ; instcombine shouldn't delete the shufflevector. 5 6 define internal void @""(i8*, i32, i8*) { 7 ; <label>:3 8 br label %4 9 10 ; <label>:4 ; preds = %6, %3 11 %.0 = phi i32 [ 0, %3 ], [ %19, %6 ] ; <i32> [#uses=4] 12 %5 = icmp slt i32 %.0, %1 ; <i1> [#uses=1] 13 br i1 %5, label %6, label %20 14 15 ; <label>:6 ; preds = %4 16 %7 = getelementptr i8, i8* %2, i32 %.0 ; <i8*> [#uses=1] 17 %8 = bitcast i8* %7 to <4 x i16>* ; <<4 x i16>*> [#uses=1] 18 %9 = load <4 x i16>, <4 x i16>* %8, align 1 ; <<4 x i16>> [#uses=1] 19 %10 = bitcast <4 x i16> %9 to <1 x i64> ; <<1 x i64>> [#uses=1] 20 %11 = call <2 x i64> @foo(<1 x i64> %10) 21 ; <<2 x i64>> [#uses=1] 22 %12 = bitcast <2 x i64> %11 to <4 x i32> ; <<4 x i32>> [#uses=1] 23 %13 = bitcast <4 x i32> %12 to <8 x i16> ; <<8 x i16>> [#uses=2] 24 %14 = shufflevector <8 x i16> %13, <8 x i16> %13, <8 x i32> < i32 0, i32 0, i32 1, i32 1, i32 2, i32 2, i32 3, i32 3 > ; <<8 x i16>> [#uses=1] 25 %15 = bitcast <8 x i16> %14 to <4 x i32> ; <<4 x i32>> [#uses=1] 26 %16 = sitofp <4 x i32> %15 to <4 x float> ; <<4 x float>> [#uses=1] 27 %17 = getelementptr i8, i8* %0, i32 %.0 ; <i8*> [#uses=1] 28 %18 = bitcast i8* %17 to <4 x float>* ; <<4 x float>*> [#uses=1] 29 store <4 x float> %16, <4 x float>* %18, align 1 30 %19 = add i32 %.0, 1 ; <i32> [#uses=1] 31 br label %4 32 33 ; <label>:20 ; preds = %4 34 call void @llvm.x86.mmx.emms( ) 35 ret void 36 } 37 38 declare <2 x i64> @foo(<1 x i64>) 39 declare void @llvm.x86.mmx.emms( ) 40
