derek.holloway
7502bf64a4
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70 lines
2.6 KiB
LLVM
70 lines
2.6 KiB
LLVM
; RUN: opt -passes='sroa<aggregate-to-vector>' -S %s | FileCheck %s
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; NOTE: Do not autogenerate. This test intentionally uses targeted CHECK
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; patterns for clarity.
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; When SROA splits { ptr, i64, i64, i64 } into [0,8), [8,16), [16,32),
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; the [16,32) partition type from getTypePartition is { i64, i64 }.
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; With the simplified fallback rule, that partition canonicalizes to <2 x i64>
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; because its remaining users are all mem intrinsics.
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; CHECK-LABEL: define void @test_subpartition_type(
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; CHECK: %a.sroa.6.0.copyload = load <2 x i64>, ptr %a.sroa.6.0.src.sroa_idx, align 8
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; CHECK: store <2 x i64> %a.sroa.6.0.copyload, ptr %a.sroa.6.0.dst.sroa_idx, align 8
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define void @test_subpartition_type(ptr %src, ptr %dst) {
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entry:
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%a = alloca { ptr, i64, i64, i64 }, align 8
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call void @llvm.lifetime.start.p0(i64 32, ptr %a)
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; Copy all 32 bytes from src into %a (splittable)
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call void @llvm.memcpy.p0.p0.i64(ptr align 8 %a, ptr align 8 %src, i64 32, i1 false)
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; Load ptr at [0,8) -- forces partition boundary at 8
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%p = load ptr, ptr %a, align 8
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; Load i64 at [8,16) -- forces partition boundary at 16
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%gep.a.8 = getelementptr inbounds i8, ptr %a, i64 8
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%v1 = load i64, ptr %gep.a.8, align 8
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; Only splittable memcpy uses touch [16,32), so SROA creates a single
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; [16,32) partition. getTypePartition returns { i64, i64 } for this, and
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; the simplified fallback rule canonicalizes it to <2 x i64>.
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; Copy all 32 bytes from %a to dst (splittable)
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call void @llvm.memcpy.p0.p0.i64(ptr align 8 %dst, ptr align 8 %a, i64 32, i1 false)
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call void @llvm.lifetime.end.p0(i64 32, ptr %a)
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ret void
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}
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; Element-wise { double, double } access through a phi.
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; The phi between two allocas prevents SROA slice analysis
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; ("A pointer to this alloca escaped"), so the allocas survive.
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; CHECK-LABEL: define void @test_elementwise_phi(
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; CHECK-NOT: <2 x double>
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define void @test_elementwise_phi(ptr %src0, ptr %src1, i1 %cond, ptr %dst) {
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entry:
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%a = alloca { double, double }, align 8
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%b = alloca { double, double }, align 8
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%a.1 = getelementptr inbounds i8, ptr %a, i64 8
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%b.1 = getelementptr inbounds i8, ptr %b, i64 8
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%v0 = load double, ptr %src0, align 8
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%v1 = load double, ptr %src1, align 8
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store double %v0, ptr %a, align 8
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store double %v1, ptr %a.1, align 8
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store double 0.0, ptr %b, align 8
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store double 0.0, ptr %b.1, align 8
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br i1 %cond, label %if.then, label %if.else
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if.then:
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br label %merge
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if.else:
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br label %merge
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merge:
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%sel = phi ptr [ %a, %if.then ], [ %b, %if.else ]
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call void @llvm.memcpy.p0.p0.i64(ptr align 8 %dst, ptr align 8 %sel, i64 16, i1 false)
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ret void
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}
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