derek.holloway
7502bf64a4
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88 lines
3.5 KiB
LLVM
88 lines
3.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=memcpyopt -S -verify-memoryssa | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.8.0"
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%struct.foo = type { i8, [7 x i8], i32 }
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; Check that the memcpy is removed.
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define i32 @test1(ptr nocapture %foobie) nounwind noinline ssp uwtable {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: [[BLETCH_SROA_1:%.*]] = alloca [7 x i8], align 1
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; CHECK-NEXT: store i8 98, ptr [[FOOBIE:%.*]], align 4
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; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds [[STRUCT_FOO:%.*]], ptr [[FOOBIE]], i64 0, i32 1, i64 0
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; CHECK-NEXT: [[TMP2:%.*]] = getelementptr inbounds [[STRUCT_FOO]], ptr [[FOOBIE]], i64 0, i32 2
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; CHECK-NEXT: store i32 20, ptr [[TMP2]], align 4
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; CHECK-NEXT: ret i32 undef
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;
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%bletch.sroa.1 = alloca [7 x i8], align 1
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store i8 98, ptr %foobie, align 4
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%1 = getelementptr inbounds %struct.foo, ptr %foobie, i64 0, i32 1, i64 0
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call void @llvm.memcpy.p0.p0.i64(ptr %1, ptr %bletch.sroa.1, i64 7, i1 false)
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%2 = getelementptr inbounds %struct.foo, ptr %foobie, i64 0, i32 2
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store i32 20, ptr %2, align 4
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ret i32 undef
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}
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; Check that the memcpy is removed.
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define void @test2(ptr sret(i8) noalias nocapture %out) nounwind noinline ssp uwtable {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: [[IN:%.*]] = alloca i64, align 8
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr [[IN]])
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; CHECK-NEXT: ret void
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;
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%in = alloca i64
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call void @llvm.lifetime.start.p0(ptr %in)
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call void @llvm.memcpy.p0.p0.i64(ptr %out, ptr %in, i64 8, i1 false)
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ret void
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}
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; Check that the memcpy is not removed.
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define void @test_lifetime_may_alias(ptr %src, ptr %dst) {
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; CHECK-LABEL: @test_lifetime_may_alias(
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; CHECK-NEXT: [[LIFETIME:%.*]] = alloca i64, align 8
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr [[LIFETIME]])
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; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr [[DST:%.*]], ptr [[SRC:%.*]], i64 8, i1 false)
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; CHECK-NEXT: ret void
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;
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%lifetime = alloca i64
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call void @llvm.lifetime.start.p0(ptr %lifetime)
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call void @llvm.memcpy.p0.p0.i64(ptr %dst, ptr %src, i64 8, i1 false)
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ret void
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}
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; lifetime.start on full alloca size, copy in range.
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define void @test_lifetime_partial_alias_1(ptr noalias %dst) {
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; CHECK-LABEL: @test_lifetime_partial_alias_1(
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; CHECK-NEXT: [[A:%.*]] = alloca [16 x i8], align 1
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr [[A]])
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; CHECK-NEXT: [[GEP:%.*]] = getelementptr i8, ptr [[A]], i64 8
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; CHECK-NEXT: ret void
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;
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%a = alloca [16 x i8]
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call void @llvm.lifetime.start.p0(ptr %a)
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%gep = getelementptr i8, ptr %a, i64 8
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call void @llvm.memcpy.p0.p0.i64(ptr %dst, ptr %gep, i64 8, i1 false)
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ret void
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}
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; lifetime.start on full alloca size, copy out of range.
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define void @test_lifetime_partial_alias_2(ptr noalias %dst) {
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; CHECK-LABEL: @test_lifetime_partial_alias_2(
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; CHECK-NEXT: [[A:%.*]] = alloca [16 x i8], align 1
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr [[A]])
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; CHECK-NEXT: [[GEP:%.*]] = getelementptr i8, ptr [[A]], i64 8
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; CHECK-NEXT: ret void
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;
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%a = alloca [16 x i8]
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call void @llvm.lifetime.start.p0(ptr %a)
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%gep = getelementptr i8, ptr %a, i64 8
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call void @llvm.memcpy.p0.p0.i64(ptr %dst, ptr %gep, i64 16, i1 false)
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ret void
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}
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declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture, i64, i1) nounwind
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declare void @llvm.lifetime.start.p0(ptr nocapture) nounwind
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