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