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- ; RUN: opt < %s -instcombine -S | grep "insertelement <4 x float> undef"
- ; Instcombine should be able to prove that none of the
- ; insertelement's first operand's elements are needed.
- define internal void @""(i8*) {
- ; <label>:1
- bitcast i8* %0 to i32* ; <i32*>:2 [#uses=1]
- load i32, i32* %2, align 1 ; <i32>:3 [#uses=1]
- getelementptr i8, i8* %0, i32 4 ; <i8*>:4 [#uses=1]
- bitcast i8* %4 to i32* ; <i32*>:5 [#uses=1]
- load i32, i32* %5, align 1 ; <i32>:6 [#uses=1]
- br label %7
- ; <label>:7 ; preds = %9, %1
- %.01 = phi <4 x float> [ undef, %1 ], [ %12, %9 ] ; <<4 x float>> [#uses=1]
- %.0 = phi i32 [ %3, %1 ], [ %15, %9 ] ; <i32> [#uses=3]
- icmp slt i32 %.0, %6 ; <i1>:8 [#uses=1]
- br i1 %8, label %9, label %16
- ; <label>:9 ; preds = %7
- sitofp i32 %.0 to float ; <float>:10 [#uses=1]
- insertelement <4 x float> %.01, float %10, i32 0 ; <<4 x float>>:11 [#uses=1]
- shufflevector <4 x float> %11, <4 x float> undef, <4 x i32> zeroinitializer ; <<4 x float>>:12 [#uses=2]
- getelementptr i8, i8* %0, i32 48 ; <i8*>:13 [#uses=1]
- bitcast i8* %13 to <4 x float>* ; <<4 x float>*>:14 [#uses=1]
- store <4 x float> %12, <4 x float>* %14, align 16
- add i32 %.0, 2 ; <i32>:15 [#uses=1]
- br label %7
- ; <label>:16 ; preds = %7
- ret void
- }
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