8ee410c75e
Even if an argument is captured, we cannot have an effect the function does not have. This is fine except for the special case of `inalloca` as it does not behave by the rules. TODO: Maybe the special rule for `inalloca` is wrong after all. llvm-svn: 374736
158 lines
5.5 KiB
LLVM
158 lines
5.5 KiB
LLVM
; RUN: opt < %s -functionattrs -S | FileCheck %s --check-prefixes=CHECK,FNATTR
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; RUN: opt < %s -aa-pipeline=basic-aa -passes='cgscc(function-attrs)' -S | FileCheck %s --check-prefixes=CHECK,FNATTR
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; RUN: opt < %s -attributor -attributor-disable=false -S | FileCheck %s --check-prefixes=CHECK,ATTRIBUTOR
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; RUN: opt < %s -aa-pipeline=basic-aa -passes='attributor' -attributor-disable=false -S | FileCheck %s --check-prefixes=CHECK,ATTRIBUTOR
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@x = global i32 0
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declare void @test1_1(i8* %x1_1, i8* readonly %y1_1, ...)
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; NOTE: readonly for %y1_2 would be OK here but not for the similar situation in test13.
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;
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; FNATTR: define void @test1_2(i8* %x1_2, i8* readonly %y1_2, i8* %z1_2)
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; ATTRIBUTOR: define void @test1_2(i8* %x1_2, i8* %y1_2, i8* %z1_2)
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define void @test1_2(i8* %x1_2, i8* %y1_2, i8* %z1_2) {
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call void (i8*, i8*, ...) @test1_1(i8* %x1_2, i8* %y1_2, i8* %z1_2)
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store i32 0, i32* @x
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ret void
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}
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; FNATTR: define i8* @test2(i8* readnone returned %p)
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; ATTRIBUTOR: define i8* @test2(i8* readnone returned %p)
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define i8* @test2(i8* %p) {
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store i32 0, i32* @x
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ret i8* %p
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}
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; CHECK: define i1 @test3(i8* readnone %p, i8* readnone %q)
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define i1 @test3(i8* %p, i8* %q) {
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%A = icmp ult i8* %p, %q
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ret i1 %A
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}
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declare void @test4_1(i8* nocapture) readonly
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; CHECK: define void @test4_2(i8* nocapture readonly %p)
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define void @test4_2(i8* %p) {
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call void @test4_1(i8* %p)
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ret void
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}
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; FNATTR: define void @test5(i8** nocapture %p, i8* %q)
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; ATTRIBUTOR: define void @test5(i8** nocapture nonnull writeonly dereferenceable(8) %p, i8* writeonly %q)
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; Missed optz'n: we could make %q readnone, but don't break test6!
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define void @test5(i8** %p, i8* %q) {
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store i8* %q, i8** %p
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ret void
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}
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declare void @test6_1()
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; FNATTR: define void @test6_2(i8** nocapture %p, i8* %q)
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; ATTRIBUTOR: define void @test6_2(i8** nocapture nonnull writeonly dereferenceable(8) %p, i8* %q)
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; This is not a missed optz'n.
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define void @test6_2(i8** %p, i8* %q) {
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store i8* %q, i8** %p
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call void @test6_1()
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ret void
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}
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; FNATTR: define void @test7_1(i32* inalloca nocapture %a)
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; ATTRIBUTOR: define void @test7_1(i32* inalloca nocapture writeonly %a)
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; inalloca parameters are always considered written
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define void @test7_1(i32* inalloca %a) {
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ret void
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}
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; FNATTR: define i32* @test8_1(i32* readnone returned %p)
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; ATTRIBUTOR: define i32* @test8_1(i32* readnone returned %p)
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define i32* @test8_1(i32* %p) {
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entry:
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ret i32* %p
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}
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; FNATTR: define void @test8_2(i32* %p)
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; ATTRIBUTOR: define void @test8_2(i32* nocapture writeonly %p)
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define void @test8_2(i32* %p) {
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entry:
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%call = call i32* @test8_1(i32* %p)
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store i32 10, i32* %call, align 4
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ret void
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}
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; CHECK: declare void @llvm.masked.scatter
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declare void @llvm.masked.scatter.v4i32.v4p0i32(<4 x i32>%val, <4 x i32*>, i32, <4 x i1>)
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; CHECK-NOT: readnone
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; CHECK-NOT: readonly
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; CHECK: define void @test9
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define void @test9(<4 x i32*> %ptrs, <4 x i32>%val) {
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call void @llvm.masked.scatter.v4i32.v4p0i32(<4 x i32>%val, <4 x i32*> %ptrs, i32 4, <4 x i1><i1 true, i1 false, i1 true, i1 false>)
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ret void
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}
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; CHECK: declare <4 x i32> @llvm.masked.gather
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declare <4 x i32> @llvm.masked.gather.v4i32.v4p0i32(<4 x i32*>, i32, <4 x i1>, <4 x i32>)
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; CHECK: readonly
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; CHECK: define <4 x i32> @test10
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define <4 x i32> @test10(<4 x i32*> %ptrs) {
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%res = call <4 x i32> @llvm.masked.gather.v4i32.v4p0i32(<4 x i32*> %ptrs, i32 4, <4 x i1><i1 true, i1 false, i1 true, i1 false>, <4 x i32>undef)
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ret <4 x i32> %res
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}
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; CHECK: declare <4 x i32> @test11_1
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declare <4 x i32> @test11_1(<4 x i32*>) argmemonly nounwind readonly
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; CHECK: readonly
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; CHECK-NOT: readnone
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; CHECK: define <4 x i32> @test11_2
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define <4 x i32> @test11_2(<4 x i32*> %ptrs) {
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%res = call <4 x i32> @test11_1(<4 x i32*> %ptrs)
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ret <4 x i32> %res
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}
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declare <4 x i32> @test12_1(<4 x i32*>) argmemonly nounwind
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; CHECK-NOT: readnone
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; CHECK: define <4 x i32> @test12_2
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define <4 x i32> @test12_2(<4 x i32*> %ptrs) {
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%res = call <4 x i32> @test12_1(<4 x i32*> %ptrs)
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ret <4 x i32> %res
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}
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; CHECK: define i32 @volatile_load(
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; CHECK-NOT: readonly
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; CHECK: ret
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define i32 @volatile_load(i32* %p) {
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%load = load volatile i32, i32* %p
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ret i32 %load
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}
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declare void @escape_readnone_ptr(i8** %addr, i8* readnone %ptr)
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declare void @escape_readonly_ptr(i8** %addr, i8* readonly %ptr)
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; The argument pointer %escaped_then_written cannot be marked readnone/only even
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; though the only direct use, in @escape_readnone_ptr/@escape_readonly_ptr,
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; is marked as readnone/only. However, the functions can write the pointer into
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; %addr, causing the store to write to %escaped_then_written.
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;
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; FIXME: This test currently exposes a bug in functionattrs!
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;
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; FNATTR: define void @unsound_readnone(i8* nocapture readnone %ignored, i8* readnone %escaped_then_written)
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; FNATTR: define void @unsound_readonly(i8* nocapture readnone %ignored, i8* readonly %escaped_then_written)
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;
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; ATTRIBUTOR: define void @unsound_readnone(i8* nocapture readnone %ignored, i8* %escaped_then_written)
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; ATTRIBUTOR: define void @unsound_readonly(i8* nocapture readnone %ignored, i8* %escaped_then_written)
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define void @unsound_readnone(i8* %ignored, i8* %escaped_then_written) {
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%addr = alloca i8*
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call void @escape_readnone_ptr(i8** %addr, i8* %escaped_then_written)
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%addr.ld = load i8*, i8** %addr
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store i8 0, i8* %addr.ld
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ret void
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}
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define void @unsound_readonly(i8* %ignored, i8* %escaped_then_written) {
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%addr = alloca i8*
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call void @escape_readonly_ptr(i8** %addr, i8* %escaped_then_written)
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%addr.ld = load i8*, i8** %addr
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store i8 0, i8* %addr.ld
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ret void
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}
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