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https://github.com/c64scene-ar/llvm-6502.git
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46d36be2eb
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205899 91177308-0d34-0410-b5e6-96231b3b80d8
36 lines
1.3 KiB
LLVM
36 lines
1.3 KiB
LLVM
; RUN: llc < %s -march=arm64 -arm64-neon-syntax=apple | FileCheck %s
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; Check that building up a vector w/ only one non-zero lane initializes
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; intelligently.
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define void @one_lane(i32* nocapture %out_int, i32 %skip0) nounwind {
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; CHECK-LABEL: one_lane:
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; CHECK: dup.16b v[[REG:[0-9]+]], wzr
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; CHECK-NEXT: ins.b v[[REG]][0], w1
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; v and q are aliases, and str is preferred against st.16b when possible
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; rdar://11246289
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; CHECK: str q[[REG]], [x0]
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; CHECK: ret
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%conv = trunc i32 %skip0 to i8
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%vset_lane = insertelement <16 x i8> <i8 undef, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0>, i8 %conv, i32 0
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%tmp = bitcast i32* %out_int to <4 x i32>*
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%tmp1 = bitcast <16 x i8> %vset_lane to <4 x i32>
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store <4 x i32> %tmp1, <4 x i32>* %tmp, align 16
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ret void
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}
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; Check that building a vector from floats doesn't insert an unnecessary
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; copy for lane zero.
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define <4 x float> @foo(float %a, float %b, float %c, float %d) nounwind {
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; CHECK-LABEL: foo:
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; CHECK-NOT: ins.s v0[0], v0[0]
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; CHECK: ins.s v0[1], v1[0]
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; CHECK: ins.s v0[2], v2[0]
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; CHECK: ins.s v0[3], v3[0]
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; CHECK: ret
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%1 = insertelement <4 x float> undef, float %a, i32 0
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%2 = insertelement <4 x float> %1, float %b, i32 1
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%3 = insertelement <4 x float> %2, float %c, i32 2
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%4 = insertelement <4 x float> %3, float %d, i32 3
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ret <4 x float> %4
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}
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