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llvm-project/llvm/test/Transforms/FunctionAttrs/new_attributes.ll

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[Attributor] FIX: Treat new attributes as changed ones Summary: When we have new attributes and we end the fixpoint iteration because the iteration limit is reached, we need to treat the new ones as if they changed in the last iteration, as they might have. This adds a test for which we should not derive anything regardless of the iteration limit, e.g., if we abort there should not be any attributes manifested in the IR. Reviewers: uenoku, sstefan1 Subscribers: hiraditya, bollu, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66549 llvm-svn: 369768
2019-08-23 23:24:57 +08:00
; RUN: opt < %s -attributor -attributor-disable=false -attributor-max-iterations=0 -S | FileCheck %s
; RUN: opt < %s -attributor -attributor-disable=false -attributor-max-iterations=1 -S | FileCheck %s
; RUN: opt < %s -attributor -attributor-disable=false -attributor-max-iterations=2 -S | FileCheck %s
; RUN: opt < %s -attributor -attributor-disable=false -attributor-max-iterations=3 -S | FileCheck %s
; RUN: opt < %s -attributor -attributor-disable=false -attributor-max-iterations=4 -S | FileCheck %s
; RUN: opt < %s -attributor -attributor-disable=false -attributor-max-iterations=2147483647 -S | FileCheck %s
; CHECK-NOT: Function
; CHECK: declare i32 @foo1()
; CHECK-NOT: Function
; CHECK: declare i32 @foo2()
; CHECK-NOT: Function
; CHECK: declare i32 @foo3()
declare i32 @foo1()
declare i32 @foo2()
declare i32 @foo3()
; CHECK-NOT: Function
; CHECK: define internal i32 @bar() {
; CHECK-NEXT: %1 = call i32 @foo1()
; CHECK-NEXT: %2 = call i32 @foo2()
; CHECK-NEXT: %3 = call i32 @foo3()
[Attributor] Liveness for values Summary: This patch introduces liveness (AAIsDead) for all positions, thus for all kinds of values. For now, we say an instruction is dead if it would be removed assuming all users are dead. A call site return is different as we just look at the users. If all call site returns have been eliminated, the return values can return undef instead of their original value, eliminating uses. We try to recursively delete dead instructions now and we introduce a simple check interface for use-traversal. This is the idea tried out in D68626 but implemented in the right way. Reviewers: uenoku, sstefan1 Subscribers: hiraditya, bollu, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D68925
2019-10-13 16:08:18 +08:00
; CHECK-NEXT: ret i32 undef
[Attributor] FIX: Treat new attributes as changed ones Summary: When we have new attributes and we end the fixpoint iteration because the iteration limit is reached, we need to treat the new ones as if they changed in the last iteration, as they might have. This adds a test for which we should not derive anything regardless of the iteration limit, e.g., if we abort there should not be any attributes manifested in the IR. Reviewers: uenoku, sstefan1 Subscribers: hiraditya, bollu, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66549 llvm-svn: 369768
2019-08-23 23:24:57 +08:00
; CHECK-NEXT: }
define internal i32 @bar() {
%1 = call i32 @foo1()
%2 = call i32 @foo2()
%3 = call i32 @foo3()
ret i32 1
}
; CHECK-NOT: Function
; CHECK: define i32 @baz() {
; CHECK-NEXT: %1 = call i32 @bar()
; CHECK-NEXT: ret i32 0
; CHECK-NEXT: }
define i32 @baz() {
%1 = call i32 @bar()
ret i32 0
}
; We should never derive anything here
; CHECK-NOT: attributes