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llvm-project/llvm/test/Transforms/Attributor/value-simplify.ll

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[Attributor][FIX] Make value simplification aware of "complicated" attributes We cannot simply replace arguments that carry attributes like `nest`, `inalloca`, `sret`, and `byval`. Except for the last one, which we can replace if it is not written, we bail for now.
2019-11-02 02:42:54 +08:00
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --scrub-attributes
[Attributor][NFCI] Avoid unnecessary work except for testing Trying to deduce information for declarations and calls sites of declarations is not useful in practice but only for testing. Add a flag that disables this by default but also enable it in the tests. The misc.ll test will verify the flag "works" as expected.
2019-11-01 09:15:02 +08:00
; RUN: opt -attributor --attributor-disable=false -attributor-annotate-decl-cs -S < %s | FileCheck %s
[Attributor] ValueSimplify Abstract Attribute Summary: This patch introduces initial `AAValueSimplify` which simplifies a value in a context. example - (for function returned) If all the return values are the same and constant, then we can replace callsite returned with the constant. - If an internal function takes the same value(constant) as an argument in the callsite, then we can replace the argument with that constant. Reviewers: jdoerfert, sstefan1 Reviewed By: jdoerfert Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66967 llvm-svn: 371291
2019-09-07 15:03:05 +08:00
; TODO: Add max-iteration check
[Attributor][FIX] Make value simplification aware of "complicated" attributes We cannot simply replace arguments that carry attributes like `nest`, `inalloca`, `sret`, and `byval`. Except for the last one, which we can replace if it is not written, we bail for now.
2019-11-02 02:42:54 +08:00
; Disable update test checks and enable it where required.
; UTC_ARGS: --turn off
[Attributor] ValueSimplify Abstract Attribute Summary: This patch introduces initial `AAValueSimplify` which simplifies a value in a context. example - (for function returned) If all the return values are the same and constant, then we can replace callsite returned with the constant. - If an internal function takes the same value(constant) as an argument in the callsite, then we can replace the argument with that constant. Reviewers: jdoerfert, sstefan1 Reviewed By: jdoerfert Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66967 llvm-svn: 371291
2019-09-07 15:03:05 +08:00
; ModuleID = 'value-simplify.ll'
source_filename = "value-simplify.ll"
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
declare void @f(i32)
; Test1: Replace argument with constant
define internal void @test1(i32 %a) {
; CHECK: tail call void @f(i32 1)
tail call void @f(i32 %a)
ret void
}
define void @test1_helper() {
tail call void @test1(i32 1)
ret void
}
; TEST 2 : Simplify return value
define i32 @return0() {
ret i32 0
}
define i32 @return1() {
ret i32 1
}
; CHECK: define i32 @test2_1(i1 %c)
define i32 @test2_1(i1 %c) {
br i1 %c, label %if.true, label %if.false
if.true:
%call = tail call i32 @return0()
Revert "[Attributor] AAValueConstantRange: Value range analysis using constant range" This reverts commit e9963034314edf49a12ea5e29f694d8f9f52734a.
2020-01-03 10:03:56 +08:00
; FIXME: %ret0 should be replaced with i32 1.
; CHECK: %ret0 = add i32 0, 1
[Attributor] ValueSimplify Abstract Attribute Summary: This patch introduces initial `AAValueSimplify` which simplifies a value in a context. example - (for function returned) If all the return values are the same and constant, then we can replace callsite returned with the constant. - If an internal function takes the same value(constant) as an argument in the callsite, then we can replace the argument with that constant. Reviewers: jdoerfert, sstefan1 Reviewed By: jdoerfert Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66967 llvm-svn: 371291
2019-09-07 15:03:05 +08:00
%ret0 = add i32 %call, 1
br label %end
if.false:
%ret1 = tail call i32 @return1()
br label %end
end:
Revert "[Attributor] AAValueConstantRange: Value range analysis using constant range" This reverts commit e9963034314edf49a12ea5e29f694d8f9f52734a.
2020-01-03 10:03:56 +08:00
; FIXME: %ret should be replaced with i32 1.
[Attributor] ValueSimplify Abstract Attribute Summary: This patch introduces initial `AAValueSimplify` which simplifies a value in a context. example - (for function returned) If all the return values are the same and constant, then we can replace callsite returned with the constant. - If an internal function takes the same value(constant) as an argument in the callsite, then we can replace the argument with that constant. Reviewers: jdoerfert, sstefan1 Reviewed By: jdoerfert Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66967 llvm-svn: 371291
2019-09-07 15:03:05 +08:00
; CHECK: %ret = phi i32 [ %ret0, %if.true ], [ 1, %if.false ]
%ret = phi i32 [ %ret0, %if.true ], [ %ret1, %if.false ]
Revert "[Attributor] AAValueConstantRange: Value range analysis using constant range" This reverts commit e9963034314edf49a12ea5e29f694d8f9f52734a.
2020-01-03 10:03:56 +08:00
; FIXME: ret i32 1
; CHECK: ret i32 %ret
ret i32 %ret
[Attributor] ValueSimplify Abstract Attribute Summary: This patch introduces initial `AAValueSimplify` which simplifies a value in a context. example - (for function returned) If all the return values are the same and constant, then we can replace callsite returned with the constant. - If an internal function takes the same value(constant) as an argument in the callsite, then we can replace the argument with that constant. Reviewers: jdoerfert, sstefan1 Reviewed By: jdoerfert Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66967 llvm-svn: 371291
2019-09-07 15:03:05 +08:00
}
; CHECK: define i32 @test2_2(i1 %c)
define i32 @test2_2(i1 %c) {
Revert "[Attributor] AAValueConstantRange: Value range analysis using constant range" This reverts commit e9963034314edf49a12ea5e29f694d8f9f52734a.
2020-01-03 10:03:56 +08:00
; FIXME: %ret should be replaced with i32 1.
[Attributor] ValueSimplify Abstract Attribute Summary: This patch introduces initial `AAValueSimplify` which simplifies a value in a context. example - (for function returned) If all the return values are the same and constant, then we can replace callsite returned with the constant. - If an internal function takes the same value(constant) as an argument in the callsite, then we can replace the argument with that constant. Reviewers: jdoerfert, sstefan1 Reviewed By: jdoerfert Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66967 llvm-svn: 371291
2019-09-07 15:03:05 +08:00
%ret = tail call i32 @test2_1(i1 %c)
Revert "[Attributor] AAValueConstantRange: Value range analysis using constant range" This reverts commit e9963034314edf49a12ea5e29f694d8f9f52734a.
2020-01-03 10:03:56 +08:00
; FIXME: ret i32 1
; CHECK: ret i32 %ret
[Attributor] ValueSimplify Abstract Attribute Summary: This patch introduces initial `AAValueSimplify` which simplifies a value in a context. example - (for function returned) If all the return values are the same and constant, then we can replace callsite returned with the constant. - If an internal function takes the same value(constant) as an argument in the callsite, then we can replace the argument with that constant. Reviewers: jdoerfert, sstefan1 Reviewed By: jdoerfert Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66967 llvm-svn: 371291
2019-09-07 15:03:05 +08:00
ret i32 %ret
}
declare void @use(i32)
; CHECK: define void @test3(i1 %c)
define void @test3(i1 %c) {
br i1 %c, label %if.true, label %if.false
if.true:
br label %end
if.false:
%ret1 = tail call i32 @return1()
br label %end
end:
; CHECK: %r = phi i32 [ 1, %if.true ], [ 1, %if.false ]
%r = phi i32 [ 1, %if.true ], [ %ret1, %if.false ]
; CHECK: tail call void @use(i32 1)
tail call void @use(i32 %r)
ret void
}
define void @test-select-phi(i1 %c) {
%select-same = select i1 %c, i32 1, i32 1
; CHECK: tail call void @use(i32 1)
tail call void @use(i32 %select-same)
%select-not-same = select i1 %c, i32 1, i32 0
; CHECK: tail call void @use(i32 %select-not-same)
tail call void @use(i32 %select-not-same)
br i1 %c, label %if-true, label %if-false
if-true:
br label %end
if-false:
br label %end
end:
%phi-same = phi i32 [ 1, %if-true ], [ 1, %if-false ]
%phi-not-same = phi i32 [ 0, %if-true ], [ 1, %if-false ]
%phi-same-prop = phi i32 [ 1, %if-true ], [ %select-same, %if-false ]
%phi-same-undef = phi i32 [ 1, %if-true ], [ undef, %if-false ]
%select-not-same-undef = select i1 %c, i32 %phi-not-same, i32 undef
; CHECK: tail call void @use(i32 1)
tail call void @use(i32 %phi-same)
; CHECK: tail call void @use(i32 %phi-not-same)
tail call void @use(i32 %phi-not-same)
; CHECK: tail call void @use(i32 1)
tail call void @use(i32 %phi-same-prop)
; CHECK: tail call void @use(i32 1)
tail call void @use(i32 %phi-same-undef)
; CHECK: tail call void @use(i32 %select-not-same-undef)
tail call void @use(i32 %select-not-same-undef)
ret void
}
[Attributor] Make liveness "edge-based" Summary: If control is transferred to a successor is the key question when it comes to liveness. The new implementation puts that question in the focus and thereby providing a clean way to assume certain CFG edges are dead or instructions will not transfer control. Reviewers: sstefan1, uenoku Subscribers: hiraditya, bollu, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D69605
2019-10-30 00:47:47 +08:00
define i32 @ipccp1(i32 %a) {
; CHECK-LABEL: define {{[^@]+}}@ipccp1
Revert "[Attributor] AAValueConstantRange: Value range analysis using constant range" This reverts commit e9963034314edf49a12ea5e29f694d8f9f52734a.
2020-01-03 10:03:56 +08:00
; CHECK-SAME: (i32 returned [[A:%.*]]) #0
[Attributor] Make liveness "edge-based" Summary: If control is transferred to a successor is the key question when it comes to liveness. The new implementation puts that question in the focus and thereby providing a clean way to assume certain CFG edges are dead or instructions will not transfer control. Reviewers: sstefan1, uenoku Subscribers: hiraditya, bollu, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D69605
2019-10-30 00:47:47 +08:00
; CHECK-NEXT: br i1 true, label [[T:%.*]], label [[F:%.*]]
; CHECK: t:
; CHECK-NEXT: ret i32 [[A:%.*]]
; CHECK: f:
; CHECK-NEXT: unreachable
;
br i1 true, label %t, label %f
t:
ret i32 %a
f:
%r = call i32 @ipccp1(i32 5)
ret i32 %r
}
define internal i1 @ipccp2i(i1 %a) {
; CHECK-LABEL: define {{[^@]+}}@ipccp2i
Revert "[Attributor] AAValueConstantRange: Value range analysis using constant range" This reverts commit e9963034314edf49a12ea5e29f694d8f9f52734a.
2020-01-03 10:03:56 +08:00
; CHECK-SAME: (i1 returned [[A:%.*]]) #0
[Attributor] Use `changeUseAfterManifest` in AAValueSimplify manifest Summary: This patch makes `AAValueSimplify` use `changeUsesAfterManifest` in `manifest`. This will invoke simple folding after the manifest. Reviewers: jdoerfert, sstefan1 Reviewed By: jdoerfert Subscribers: hiraditya, arphaman, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D71972
2019-12-30 16:08:48 +08:00
; CHECK-NEXT: br label %t
[Attributor] Make liveness "edge-based" Summary: If control is transferred to a successor is the key question when it comes to liveness. The new implementation puts that question in the focus and thereby providing a clean way to assume certain CFG edges are dead or instructions will not transfer control. Reviewers: sstefan1, uenoku Subscribers: hiraditya, bollu, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D69605
2019-10-30 00:47:47 +08:00
; CHECK: t:
; CHECK-NEXT: ret i1 true
; CHECK: f:
; CHECK-NEXT: unreachable
;
br i1 %a, label %t, label %f
t:
ret i1 %a
f:
%r = call i1 @ipccp2i(i1 false)
ret i1 %r
}
define i1 @ipccp2() {
Revert "[Attributor] AAValueConstantRange: Value range analysis using constant range" This reverts commit e9963034314edf49a12ea5e29f694d8f9f52734a.
2020-01-03 10:03:56 +08:00
; CHECK-LABEL: define {{[^@]+}}@ipccp2() #1
; CHECK-NEXT: [[R:%.*]] = call i1 @ipccp2i(i1 true) #0
[Attributor] Make liveness "edge-based" Summary: If control is transferred to a successor is the key question when it comes to liveness. The new implementation puts that question in the focus and thereby providing a clean way to assume certain CFG edges are dead or instructions will not transfer control. Reviewers: sstefan1, uenoku Subscribers: hiraditya, bollu, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D69605
2019-10-30 00:47:47 +08:00
; CHECK-NEXT: ret i1 [[R]]
;
%r = call i1 @ipccp2i(i1 true)
ret i1 %r
}
define internal i32 @ipccp3i(i32 %a) {
; CHECK-LABEL: define {{[^@]+}}@ipccp3i
Revert "[Attributor] AAValueConstantRange: Value range analysis using constant range" This reverts commit e9963034314edf49a12ea5e29f694d8f9f52734a.
2020-01-03 10:03:56 +08:00
; CHECK-SAME: (i32 [[A:%.*]]) #1
; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[A:%.*]], 7
; CHECK-NEXT: br i1 [[C]], label [[T:%.*]], label [[F:%.*]]
[Attributor] Make liveness "edge-based" Summary: If control is transferred to a successor is the key question when it comes to liveness. The new implementation puts that question in the focus and thereby providing a clean way to assume certain CFG edges are dead or instructions will not transfer control. Reviewers: sstefan1, uenoku Subscribers: hiraditya, bollu, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D69605
2019-10-30 00:47:47 +08:00
; CHECK: t:
Revert "[Attributor] AAValueConstantRange: Value range analysis using constant range" This reverts commit e9963034314edf49a12ea5e29f694d8f9f52734a.
2020-01-03 10:03:56 +08:00
; CHECK-NEXT: ret i32 [[A]]
[Attributor] Make liveness "edge-based" Summary: If control is transferred to a successor is the key question when it comes to liveness. The new implementation puts that question in the focus and thereby providing a clean way to assume certain CFG edges are dead or instructions will not transfer control. Reviewers: sstefan1, uenoku Subscribers: hiraditya, bollu, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D69605
2019-10-30 00:47:47 +08:00
; CHECK: f:
Revert "[Attributor] AAValueConstantRange: Value range analysis using constant range" This reverts commit e9963034314edf49a12ea5e29f694d8f9f52734a.
2020-01-03 10:03:56 +08:00
; CHECK-NEXT: [[R:%.*]] = call i32 @ipccp3i(i32 5) #1
; CHECK-NEXT: ret i32 [[R]]
[Attributor] Make liveness "edge-based" Summary: If control is transferred to a successor is the key question when it comes to liveness. The new implementation puts that question in the focus and thereby providing a clean way to assume certain CFG edges are dead or instructions will not transfer control. Reviewers: sstefan1, uenoku Subscribers: hiraditya, bollu, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D69605
2019-10-30 00:47:47 +08:00
;
%c = icmp eq i32 %a, 7
br i1 %c, label %t, label %f
t:
ret i32 %a
f:
%r = call i32 @ipccp3i(i32 5)
ret i32 %r
}
define i32 @ipccp3() {
Revert "[Attributor] AAValueConstantRange: Value range analysis using constant range" This reverts commit e9963034314edf49a12ea5e29f694d8f9f52734a.
2020-01-03 10:03:56 +08:00
; CHECK-LABEL: define {{[^@]+}}@ipccp3() #1
; CHECK-NEXT: [[R:%.*]] = call i32 @ipccp3i(i32 7) #1
[Attributor] Make liveness "edge-based" Summary: If control is transferred to a successor is the key question when it comes to liveness. The new implementation puts that question in the focus and thereby providing a clean way to assume certain CFG edges are dead or instructions will not transfer control. Reviewers: sstefan1, uenoku Subscribers: hiraditya, bollu, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D69605
2019-10-30 00:47:47 +08:00
; CHECK-NEXT: ret i32 [[R]]
Revert "[Attributor] AAValueConstantRange: Value range analysis using constant range" This reverts commit e9963034314edf49a12ea5e29f694d8f9f52734a.
2020-01-03 10:03:56 +08:00
;
[Attributor] Make liveness "edge-based" Summary: If control is transferred to a successor is the key question when it comes to liveness. The new implementation puts that question in the focus and thereby providing a clean way to assume certain CFG edges are dead or instructions will not transfer control. Reviewers: sstefan1, uenoku Subscribers: hiraditya, bollu, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D69605
2019-10-30 00:47:47 +08:00
%r = call i32 @ipccp3i(i32 7)
ret i32 %r
}
[Attributor][FIX] Make value simplification aware of "complicated" attributes We cannot simply replace arguments that carry attributes like `nest`, `inalloca`, `sret`, and `byval`. Except for the last one, which we can replace if it is not written, we bail for now.
2019-11-02 02:42:54 +08:00
; UTC_ARGS: --turn on
; Do not touch complicated arguments (for now)
%struct.X = type { i8* }
define internal i32* @test_inalloca(i32* inalloca %a) {
; CHECK-LABEL: define {{[^@]+}}@test_inalloca
NoFree argument attribute. Summary: Deducing nofree atrribute for function arguments. Reviewers: jdoerfert Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D67886
2019-11-02 23:35:38 +08:00
; CHECK-SAME: (i32* inalloca noalias nofree returned writeonly [[A:%.*]])
[Attributor][FIX] Make value simplification aware of "complicated" attributes We cannot simply replace arguments that carry attributes like `nest`, `inalloca`, `sret`, and `byval`. Except for the last one, which we can replace if it is not written, we bail for now.
2019-11-02 02:42:54 +08:00
; CHECK-NEXT: ret i32* [[A]]
;
ret i32* %a
}
define i32* @complicated_args_inalloca() {
; CHECK-LABEL: define {{[^@]+}}@complicated_args_inalloca()
[Attributor] Annotate the memory behavior of call site arguments Especially for callbacks, annotating the call site arguments is important. Doing so exposed a too strong dependence of AAMemoryBehavior on AANoCapture since we handle the case of potentially captured pointers explicitly. The changes to the tests are all mechanical.
2019-12-31 14:57:00 +08:00
; CHECK-NEXT: [[CALL:%.*]] = call i32* @test_inalloca(i32* noalias nofree writeonly null)
[Attributor][FIX] Make value simplification aware of "complicated" attributes We cannot simply replace arguments that carry attributes like `nest`, `inalloca`, `sret`, and `byval`. Except for the last one, which we can replace if it is not written, we bail for now.
2019-11-02 02:42:54 +08:00
; CHECK-NEXT: ret i32* [[CALL]]
;
%call = call i32* @test_inalloca(i32* null)
ret i32* %call
}
define internal void @test_sret(%struct.X* sret %a, %struct.X** %b) {
; CHECK-LABEL: define {{[^@]+}}@test_sret
NoFree argument attribute. Summary: Deducing nofree atrribute for function arguments. Reviewers: jdoerfert Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D67886
2019-11-02 23:35:38 +08:00
; CHECK-SAME: (%struct.X* nofree sret writeonly [[A:%.*]], %struct.X** nocapture nofree nonnull writeonly dereferenceable(8) [[B:%.*]])
[Attributor][FIX] Make value simplification aware of "complicated" attributes We cannot simply replace arguments that carry attributes like `nest`, `inalloca`, `sret`, and `byval`. Except for the last one, which we can replace if it is not written, we bail for now.
2019-11-02 02:42:54 +08:00
; CHECK-NEXT: store %struct.X* [[A]], %struct.X** [[B]]
; CHECK-NEXT: ret void
;
store %struct.X* %a, %struct.X** %b
ret void
}
define void @complicated_args_sret(%struct.X** %b) {
; CHECK-LABEL: define {{[^@]+}}@complicated_args_sret
NoFree argument attribute. Summary: Deducing nofree atrribute for function arguments. Reviewers: jdoerfert Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D67886
2019-11-02 23:35:38 +08:00
; CHECK-SAME: (%struct.X** nocapture nofree writeonly [[B:%.*]])
[Attributor] Annotate the memory behavior of call site arguments Especially for callbacks, annotating the call site arguments is important. Doing so exposed a too strong dependence of AAMemoryBehavior on AANoCapture since we handle the case of potentially captured pointers explicitly. The changes to the tests are all mechanical.
2019-12-31 14:57:00 +08:00
; CHECK-NEXT: call void @test_sret(%struct.X* nofree writeonly null, %struct.X** nocapture nofree writeonly [[B]])
[Attributor][FIX] Make value simplification aware of "complicated" attributes We cannot simply replace arguments that carry attributes like `nest`, `inalloca`, `sret`, and `byval`. Except for the last one, which we can replace if it is not written, we bail for now.
2019-11-02 02:42:54 +08:00
; CHECK-NEXT: ret void
;
call void @test_sret(%struct.X* null, %struct.X** %b)
ret void
}
define internal %struct.X* @test_nest(%struct.X* nest %a) {
; CHECK-LABEL: define {{[^@]+}}@test_nest
NoFree argument attribute. Summary: Deducing nofree atrribute for function arguments. Reviewers: jdoerfert Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D67886
2019-11-02 23:35:38 +08:00
; CHECK-SAME: (%struct.X* nest noalias nofree readnone returned [[A:%.*]])
[Attributor][FIX] Make value simplification aware of "complicated" attributes We cannot simply replace arguments that carry attributes like `nest`, `inalloca`, `sret`, and `byval`. Except for the last one, which we can replace if it is not written, we bail for now.
2019-11-02 02:42:54 +08:00
; CHECK-NEXT: ret %struct.X* [[A]]
;
ret %struct.X* %a
}
define %struct.X* @complicated_args_nest() {
; CHECK-LABEL: define {{[^@]+}}@complicated_args_nest()
[Attributor] Annotate the memory behavior of call site arguments Especially for callbacks, annotating the call site arguments is important. Doing so exposed a too strong dependence of AAMemoryBehavior on AANoCapture since we handle the case of potentially captured pointers explicitly. The changes to the tests are all mechanical.
2019-12-31 14:57:00 +08:00
; CHECK-NEXT: [[CALL:%.*]] = call %struct.X* @test_nest(%struct.X* noalias nofree readnone null)
[Attributor][FIX] Make value simplification aware of "complicated" attributes We cannot simply replace arguments that carry attributes like `nest`, `inalloca`, `sret`, and `byval`. Except for the last one, which we can replace if it is not written, we bail for now.
2019-11-02 02:42:54 +08:00
; CHECK-NEXT: ret %struct.X* [[CALL]]
;
%call = call %struct.X* @test_nest(%struct.X* null)
ret %struct.X* %call
}
@S = external global %struct.X
define internal void @test_byval(%struct.X* byval %a) {
; CHECK-LABEL: define {{[^@]+}}@test_byval
NoFree argument attribute. Summary: Deducing nofree atrribute for function arguments. Reviewers: jdoerfert Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D67886
2019-11-02 23:35:38 +08:00
; CHECK-SAME: (%struct.X* nocapture nofree nonnull writeonly byval align 8 dereferenceable(8) [[A:%.*]])
[Attributor][FIX] Make value simplification aware of "complicated" attributes We cannot simply replace arguments that carry attributes like `nest`, `inalloca`, `sret`, and `byval`. Except for the last one, which we can replace if it is not written, we bail for now.
2019-11-02 02:42:54 +08:00
; CHECK-NEXT: [[G0:%.*]] = getelementptr [[STRUCT_X:%.*]], %struct.X* [[A]], i32 0, i32 0
; CHECK-NEXT: store i8* null, i8** [[G0]], align 8
; CHECK-NEXT: ret void
;
%g0 = getelementptr %struct.X, %struct.X* %a, i32 0, i32 0
store i8* null, i8** %g0
ret void
}
define void @complicated_args_byval() {
; CHECK-LABEL: define {{[^@]+}}@complicated_args_byval()
[Attributor] Annotate the memory behavior of call site arguments Especially for callbacks, annotating the call site arguments is important. Doing so exposed a too strong dependence of AAMemoryBehavior on AANoCapture since we handle the case of potentially captured pointers explicitly. The changes to the tests are all mechanical.
2019-12-31 14:57:00 +08:00
; CHECK-NEXT: call void @test_byval(%struct.X* nofree nonnull readonly align 8 dereferenceable(8) @S)
[Attributor][FIX] Make value simplification aware of "complicated" attributes We cannot simply replace arguments that carry attributes like `nest`, `inalloca`, `sret`, and `byval`. Except for the last one, which we can replace if it is not written, we bail for now.
2019-11-02 02:42:54 +08:00
; CHECK-NEXT: ret void
;
call void @test_byval(%struct.X* @S)
ret void
}
[Attributor][FIX] Return CHANGED once a pessimistic fixpoint is reached.
2020-01-01 03:25:47 +08:00
define void @fixpoint_changed(i32* %p) {
; CHECK-LABEL: define {{[^@]+}}@fixpoint_changed
; CHECK-SAME: (i32* nocapture nofree writeonly [[P:%.*]])
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_COND:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[J_0:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[SW_EPILOG:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[J_0]], 30
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
; CHECK: for.body:
; CHECK-NEXT: switch i32 [[J_0]], label [[SW_EPILOG]] [
; CHECK-NEXT: i32 1, label [[SW_BB:%.*]]
; CHECK-NEXT: ]
; CHECK: sw.bb:
; CHECK-NEXT: br label [[SW_EPILOG]]
; CHECK: sw.epilog:
; CHECK-NEXT: [[X_0:%.*]] = phi i32 [ 255, [[FOR_BODY]] ], [ 253, [[SW_BB]] ]
; CHECK-NEXT: store i32 [[X_0]], i32* [[P]]
; CHECK-NEXT: [[INC]] = add nsw i32 [[J_0]], 1
; CHECK-NEXT: br label [[FOR_COND]]
; CHECK: for.end:
; CHECK-NEXT: ret void
;
entry:
br label %for.cond
for.cond:
%j.0 = phi i32 [ 0, %entry ], [ %inc, %sw.epilog ]
%cmp = icmp slt i32 %j.0, 30
br i1 %cmp, label %for.body, label %for.end
for.body:
switch i32 %j.0, label %sw.epilog [
i32 1, label %sw.bb
]
sw.bb:
br label %sw.epilog
sw.epilog:
%x.0 = phi i32 [ 255, %for.body ], [ 253, %sw.bb ]
store i32 %x.0, i32* %p
%inc = add nsw i32 %j.0, 1
br label %for.cond
for.end:
ret void
}
[Attributor][FIX] Make value simplification aware of "complicated" attributes We cannot simply replace arguments that carry attributes like `nest`, `inalloca`, `sret`, and `byval`. Except for the last one, which we can replace if it is not written, we bail for now.
2019-11-02 02:42:54 +08:00
; UTC_ARGS: --turn off