c23b4fbdbb
Now that #149310 has restricted lifetime intrinsics to only work on allocas, we can also drop the explicit size argument. Instead, the size is implied by the alloca. This removes the ability to only mark a prefix of an alloca alive/dead. We never used that capability, so we should remove the need to handle that possibility everywhere (though many key places, including stack coloring, did not actually respect this).
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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