28 lines
1.3 KiB
LLVM
28 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S -verify | FileCheck %s
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define <2 x i8> @constprop_load_bitcast(<vscale x 16 x i1>* %ptr) {
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; CHECK-LABEL: @constprop_load_bitcast(
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; CHECK-NEXT: store <vscale x 16 x i1> zeroinitializer, <vscale x 16 x i1>* [[PTR:%.*]], align 16
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; CHECK-NEXT: ret <2 x i8> zeroinitializer
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;
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store <vscale x 16 x i1> zeroinitializer, <vscale x 16 x i1>* %ptr, align 16
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%cast_to_fixed = bitcast <vscale x 16 x i1>* %ptr to <2 x i8>*
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%a = load <2 x i8>, <2 x i8>* %cast_to_fixed, align 16
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ret <2 x i8> %a
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}
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; vscale-sized vec not guaranteed to fill destination.
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define <8 x i8> @constprop_load_bitcast_neg(<vscale x 16 x i1>* %ptr) {
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; CHECK-LABEL: @constprop_load_bitcast_neg(
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; CHECK-NEXT: store <vscale x 16 x i1> zeroinitializer, <vscale x 16 x i1>* [[PTR:%.*]], align 16
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; CHECK-NEXT: [[CAST_TO_FIXED:%.*]] = bitcast <vscale x 16 x i1>* [[PTR]] to <8 x i8>*
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; CHECK-NEXT: [[A:%.*]] = load <8 x i8>, <8 x i8>* [[CAST_TO_FIXED]], align 16
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; CHECK-NEXT: ret <8 x i8> [[A]]
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;
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store <vscale x 16 x i1> zeroinitializer, <vscale x 16 x i1>* %ptr, align 16
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%cast_to_fixed = bitcast <vscale x 16 x i1>* %ptr to <8 x i8>*
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%a = load <8 x i8>, <8 x i8>* %cast_to_fixed, align 16
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ret <8 x i8> %a
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}
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