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llvm-project/llvm/test/Transforms/NewGVN/noalias.ll

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Rename scoped-noalias -> scoped-noalias-aa Summary: To match NewPM name. Also the new name is clearer and more consistent. Subscribers: jvesely, nhaehnle, hiraditya, asbirlea, kerbowa, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D84542
2020-07-25 02:54:13 +08:00
; RUN: opt -scoped-noalias-aa -basic-aa -newgvn -S < %s | FileCheck %s
Revert "Temporarily Revert "Add basic loop fusion pass."" The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
2019-04-17 12:52:47 +08:00
define i32 @test1(i32* %p, i32* %q) {
; CHECK-LABEL: @test1(i32* %p, i32* %q)
; CHECK: load i32, i32* %p
; CHECK-NOT: noalias
; CHECK: %c = add i32 %a, %a
[MemCpyOpt] Correctly merge alias scopes during call slot optimization When MemCpyOpt performs call slot optimization it will concatenate the `alias.scope` metadata between the function call and the memcpy. However, scoped AA relies on the domains in metadata to be maintained in a caller-callee relationship. Naive concatenation breaks this assumption leading to bad AA results. The fix is to take the intersection of domains then union the scopes within those domains. The original bug came from a case of rust bad codegen which uses this bad aliasing to perform additional memcpy optimizations. As show in the added test case `%src` got forwarded past its lifetime leading to a dereference of garbage data. Testing ninja check-llvm Reviewed By: jeroen.dobbelaere Differential Revision: https://reviews.llvm.org/D91576
2020-12-04 01:23:37 +08:00
%a = load i32, i32* %p, !noalias !3
Revert "Temporarily Revert "Add basic loop fusion pass."" The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
2019-04-17 12:52:47 +08:00
%b = load i32, i32* %p
%c = add i32 %a, %b
ret i32 %c
}
define i32 @test2(i32* %p, i32* %q) {
; CHECK-LABEL: @test2(i32* %p, i32* %q)
[MemCpyOpt] Correctly merge alias scopes during call slot optimization When MemCpyOpt performs call slot optimization it will concatenate the `alias.scope` metadata between the function call and the memcpy. However, scoped AA relies on the domains in metadata to be maintained in a caller-callee relationship. Naive concatenation breaks this assumption leading to bad AA results. The fix is to take the intersection of domains then union the scopes within those domains. The original bug came from a case of rust bad codegen which uses this bad aliasing to perform additional memcpy optimizations. As show in the added test case `%src` got forwarded past its lifetime leading to a dereference of garbage data. Testing ninja check-llvm Reviewed By: jeroen.dobbelaere Differential Revision: https://reviews.llvm.org/D91576
2020-12-04 01:23:37 +08:00
; CHECK: load i32, i32* %p, align 4, !alias.scope ![[SCOPE1:[0-9]+]]
Revert "Temporarily Revert "Add basic loop fusion pass."" The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
2019-04-17 12:52:47 +08:00
; CHECK: %c = add i32 %a, %a
[MemCpyOpt] Correctly merge alias scopes during call slot optimization When MemCpyOpt performs call slot optimization it will concatenate the `alias.scope` metadata between the function call and the memcpy. However, scoped AA relies on the domains in metadata to be maintained in a caller-callee relationship. Naive concatenation breaks this assumption leading to bad AA results. The fix is to take the intersection of domains then union the scopes within those domains. The original bug came from a case of rust bad codegen which uses this bad aliasing to perform additional memcpy optimizations. As show in the added test case `%src` got forwarded past its lifetime leading to a dereference of garbage data. Testing ninja check-llvm Reviewed By: jeroen.dobbelaere Differential Revision: https://reviews.llvm.org/D91576
2020-12-04 01:23:37 +08:00
%a = load i32, i32* %p, !alias.scope !3
%b = load i32, i32* %p, !alias.scope !3
Revert "Temporarily Revert "Add basic loop fusion pass."" The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
2019-04-17 12:52:47 +08:00
%c = add i32 %a, %b
ret i32 %c
}
define i32 @test3(i32* %p, i32* %q) {
; CHECK-LABEL: @test3(i32* %p, i32* %q)
[MemCpyOpt] Correctly merge alias scopes during call slot optimization When MemCpyOpt performs call slot optimization it will concatenate the `alias.scope` metadata between the function call and the memcpy. However, scoped AA relies on the domains in metadata to be maintained in a caller-callee relationship. Naive concatenation breaks this assumption leading to bad AA results. The fix is to take the intersection of domains then union the scopes within those domains. The original bug came from a case of rust bad codegen which uses this bad aliasing to perform additional memcpy optimizations. As show in the added test case `%src` got forwarded past its lifetime leading to a dereference of garbage data. Testing ninja check-llvm Reviewed By: jeroen.dobbelaere Differential Revision: https://reviews.llvm.org/D91576
2020-12-04 01:23:37 +08:00
; CHECK: load i32, i32* %p, align 4, !alias.scope ![[SCOPE2:[0-9]+]]
Revert "Temporarily Revert "Add basic loop fusion pass."" The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
2019-04-17 12:52:47 +08:00
; CHECK: %c = add i32 %a, %a
[MemCpyOpt] Correctly merge alias scopes during call slot optimization When MemCpyOpt performs call slot optimization it will concatenate the `alias.scope` metadata between the function call and the memcpy. However, scoped AA relies on the domains in metadata to be maintained in a caller-callee relationship. Naive concatenation breaks this assumption leading to bad AA results. The fix is to take the intersection of domains then union the scopes within those domains. The original bug came from a case of rust bad codegen which uses this bad aliasing to perform additional memcpy optimizations. As show in the added test case `%src` got forwarded past its lifetime leading to a dereference of garbage data. Testing ninja check-llvm Reviewed By: jeroen.dobbelaere Differential Revision: https://reviews.llvm.org/D91576
2020-12-04 01:23:37 +08:00
%a = load i32, i32* %p, !alias.scope !4
%b = load i32, i32* %p, !alias.scope !5
Revert "Temporarily Revert "Add basic loop fusion pass."" The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
2019-04-17 12:52:47 +08:00
%c = add i32 %a, %b
ret i32 %c
}
[MemCpyOpt] Correctly merge alias scopes during call slot optimization When MemCpyOpt performs call slot optimization it will concatenate the `alias.scope` metadata between the function call and the memcpy. However, scoped AA relies on the domains in metadata to be maintained in a caller-callee relationship. Naive concatenation breaks this assumption leading to bad AA results. The fix is to take the intersection of domains then union the scopes within those domains. The original bug came from a case of rust bad codegen which uses this bad aliasing to perform additional memcpy optimizations. As show in the added test case `%src` got forwarded past its lifetime leading to a dereference of garbage data. Testing ninja check-llvm Reviewed By: jeroen.dobbelaere Differential Revision: https://reviews.llvm.org/D91576
2020-12-04 01:23:37 +08:00
; CHECK: ![[SCOPE1]] = !{!{{[0-9]+}}}
; CHECK: ![[SCOPE2]] = !{!{{[0-9]+}}, !{{[0-9]+}}}
Revert "Temporarily Revert "Add basic loop fusion pass."" The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
2019-04-17 12:52:47 +08:00
declare i32 @foo(i32*) readonly
[MemCpyOpt] Correctly merge alias scopes during call slot optimization When MemCpyOpt performs call slot optimization it will concatenate the `alias.scope` metadata between the function call and the memcpy. However, scoped AA relies on the domains in metadata to be maintained in a caller-callee relationship. Naive concatenation breaks this assumption leading to bad AA results. The fix is to take the intersection of domains then union the scopes within those domains. The original bug came from a case of rust bad codegen which uses this bad aliasing to perform additional memcpy optimizations. As show in the added test case `%src` got forwarded past its lifetime leading to a dereference of garbage data. Testing ninja check-llvm Reviewed By: jeroen.dobbelaere Differential Revision: https://reviews.llvm.org/D91576
2020-12-04 01:23:37 +08:00
!0 = distinct !{!0, !2, !"callee0: %a"}
!1 = distinct !{!1, !2, !"callee0: %b"}
!2 = distinct !{!2, !"callee0"}
Revert "Temporarily Revert "Add basic loop fusion pass."" The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
2019-04-17 12:52:47 +08:00
[MemCpyOpt] Correctly merge alias scopes during call slot optimization When MemCpyOpt performs call slot optimization it will concatenate the `alias.scope` metadata between the function call and the memcpy. However, scoped AA relies on the domains in metadata to be maintained in a caller-callee relationship. Naive concatenation breaks this assumption leading to bad AA results. The fix is to take the intersection of domains then union the scopes within those domains. The original bug came from a case of rust bad codegen which uses this bad aliasing to perform additional memcpy optimizations. As show in the added test case `%src` got forwarded past its lifetime leading to a dereference of garbage data. Testing ninja check-llvm Reviewed By: jeroen.dobbelaere Differential Revision: https://reviews.llvm.org/D91576
2020-12-04 01:23:37 +08:00
!3 = !{!0}
!4 = !{!1}
!5 = !{!0, !1}