6b6f272f35
Only allow to change build_vector to concat_vector when the splat type and vector element type is same. It's to fix assertion of failing to bitcast types of different sizes.
26 lines
1.1 KiB
LLVM
26 lines
1.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
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; RUN: llc < %s -mtriple=x86_64 -mattr=avx512bw | FileCheck %s
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; Verify that the DAGCombiner doesn't change build_vector to concat_vectors if
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; the vector element type is different than splat type. The example here:
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; v8i1 = build_vector (i8 (bitcast (v8i1 X))), ..., (i8 (bitcast (v8i1 X))))
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define <8 x i1> @foo(<8 x i1> %mask.i1) {
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; CHECK-LABEL: foo:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: vxorps %xmm0, %xmm0, %xmm0
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; CHECK-NEXT: retq
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entry:
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%0 = and <8 x i1> %mask.i1, <i1 true, i1 false, i1 false, i1 false, i1 false, i1 false, i1 false, i1 false>
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%1 = bitcast <8 x i1> %0 to i8
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%2 = icmp ne i8 %1, 0
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%insert54 = insertelement <8 x i1> zeroinitializer, i1 %2, i64 0
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%splat55 = shufflevector <8 x i1> %insert54, <8 x i1> zeroinitializer, <8 x i32> zeroinitializer
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%3 = and <8 x i1> %0, %splat55
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br label %end
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end: ; preds = %entry
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%4 = select <8 x i1> %3, <8 x i1> zeroinitializer, <8 x i1> zeroinitializer
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ret <8 x i1> %4
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}
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