derek.holloway
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35 lines
1.2 KiB
LLVM
35 lines
1.2 KiB
LLVM
; RUN: llc -mtriple=hexagon < %s | FileCheck %s
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; Test coverage for HexagonSelectionDAGInfo::EmitTargetCodeForMemcpy.
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; When a memcpy has known size >= 32, alignment >= 4, and size is a
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; multiple of 8, the Hexagon backend should call a specialized memcpy.
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; CHECK-LABEL: test_memcpy_aligned:
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; CHECK: call __hexagon_memcpy_likely_aligned_min32bytes_mult8bytes
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define void @test_memcpy_aligned(ptr %dst, ptr %src) {
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entry:
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call void @llvm.memcpy.p0.p0.i32(ptr align 8 %dst, ptr align 8 %src, i32 64, i1 false)
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ret void
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}
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; Smaller memcpy (< 32 bytes) should NOT use the specialized path.
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; CHECK-LABEL: test_memcpy_small:
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; CHECK-NOT: likely_aligned
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define void @test_memcpy_small(ptr %dst, ptr %src) {
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entry:
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call void @llvm.memcpy.p0.p0.i32(ptr align 4 %dst, ptr align 4 %src, i32 16, i1 false)
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ret void
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}
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; Non-aligned memcpy should NOT use the specialized path.
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; CHECK-LABEL: test_memcpy_unaligned:
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; CHECK-NOT: likely_aligned
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define void @test_memcpy_unaligned(ptr %dst, ptr %src) {
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entry:
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 %dst, ptr align 1 %src, i32 64, i1 false)
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ret void
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}
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declare void @llvm.memcpy.p0.p0.i32(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i32, i1 immarg)
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