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llvm-project/llvm/test/Transforms/InstCombine/mem-deref-bytes.ll

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[SimplifyLibCalls] Add dereferenceable bytes from known callsites Summary: int mm(char *a, char *b) { return memcmp(a,b,16); } Currently: define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 { entry: %call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16) ret i32 %call } After patch: define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 { entry: %call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16) ret i32 %call } Reviewers: jdoerfert, efriedma Reviewed By: jdoerfert Subscribers: javed.absar, spatel, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66079 llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -instcombine -S < %s | FileCheck %s
declare i32 @memcmp(i8* nocapture, i8* nocapture, i64)
declare i8* @memcpy(i8* nocapture, i8* nocapture, i64)
declare i8* @memmove(i8* nocapture, i8* nocapture, i64)
declare i8* @memset(i8* nocapture, i8, i64)
declare i8* @memchr(i8* nocapture, i32, i64)
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1)
declare void @llvm.memmove.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1)
declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1)
define i32 @memcmp_const_size_set_deref(i8* nocapture readonly %d, i8* nocapture readonly %s) {
; CHECK-LABEL: @memcmp_const_size_set_deref(
; CHECK-NEXT: [[CALL:%.*]] = tail call i32 @memcmp(i8* dereferenceable(16) [[D:%.*]], i8* dereferenceable(16) [[S:%.*]], i64 16)
; CHECK-NEXT: ret i32 [[CALL]]
;
%call = tail call i32 @memcmp(i8* %d, i8* %s, i64 16)
ret i32 %call
}
define i32 @memcmp_const_size_update_deref(i8* nocapture readonly %d, i8* nocapture readonly %s) {
; CHECK-LABEL: @memcmp_const_size_update_deref(
; CHECK-NEXT: [[CALL:%.*]] = tail call i32 @memcmp(i8* dereferenceable(16) [[D:%.*]], i8* dereferenceable(16) [[S:%.*]], i64 16)
; CHECK-NEXT: ret i32 [[CALL]]
;
%call = tail call i32 @memcmp(i8* dereferenceable(4) %d, i8* dereferenceable(8) %s, i64 16)
ret i32 %call
}
define i32 @memcmp_const_size_update_deref2(i8* nocapture readonly %d, i8* nocapture readonly %s) {
; CHECK-LABEL: @memcmp_const_size_update_deref2(
; CHECK-NEXT: [[CALL:%.*]] = tail call i32 @memcmp(i8* dereferenceable(16) [[D:%.*]], i8* dereferenceable(16) [[S:%.*]], i64 16)
; CHECK-NEXT: ret i32 [[CALL]]
;
%call = tail call i32 @memcmp(i8* %d, i8* dereferenceable_or_null(8) %s, i64 16)
ret i32 %call
}
[NFC] Revisited/updated tests llvm-svn: 368722
2019-08-14 01:07:02 +08:00
define i32 @memcmp_const_size_update_deref3(i8* nocapture readonly %d, i8* nocapture readonly %s) {
; CHECK-LABEL: @memcmp_const_size_update_deref3(
[SimplifyLibCalls] Add dereferenceable bytes from known callsites Summary: int mm(char *a, char *b) { return memcmp(a,b,16); } Currently: define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 { entry: %call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16) ret i32 %call } After patch: define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 { entry: %call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16) ret i32 %call } Reviewers: jdoerfert, efriedma Reviewed By: jdoerfert Subscribers: javed.absar, spatel, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66079 llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-NEXT: [[CALL:%.*]] = tail call i32 @memcmp(i8* dereferenceable(40) [[D:%.*]], i8* dereferenceable(16) [[S:%.*]], i64 16)
; CHECK-NEXT: ret i32 [[CALL]]
;
%call = tail call i32 @memcmp(i8* dereferenceable(40) %d, i8* %s, i64 16)
ret i32 %call
}
[NFC] Revisited/updated tests llvm-svn: 368722
2019-08-14 01:07:02 +08:00
define i32 @memcmp_const_size_update_deref4(i8* nocapture readonly %d, i8* nocapture readonly %s) {
; CHECK-LABEL: @memcmp_const_size_update_deref4(
; CHECK-NEXT: [[CALL:%.*]] = tail call i32 @memcmp(i8* dereferenceable(16) [[D:%.*]], i8* dereferenceable(16) [[S:%.*]], i64 16)
; CHECK-NEXT: ret i32 [[CALL]]
;
%call = tail call i32 @memcmp(i8* dereferenceable_or_null(16) %d, i8* %s, i64 16)
ret i32 %call
}
define i32 @memcmp_const_size_update_deref5(i8* nocapture readonly %d, i8* nocapture readonly %s) {
; CHECK-LABEL: @memcmp_const_size_update_deref5(
[SLC] Improve dereferenceable bytes annotation llvm-svn: 368715
2019-08-14 00:44:16 +08:00
; CHECK-NEXT: [[CALL:%.*]] = tail call i32 @memcmp(i8* dereferenceable(40) [[D:%.*]], i8* dereferenceable(16) [[S:%.*]], i64 16)
[SimplifyLibCalls] Add dereferenceable bytes from known callsites Summary: int mm(char *a, char *b) { return memcmp(a,b,16); } Currently: define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 { entry: %call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16) ret i32 %call } After patch: define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 { entry: %call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16) ret i32 %call } Reviewers: jdoerfert, efriedma Reviewed By: jdoerfert Subscribers: javed.absar, spatel, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66079 llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-NEXT: ret i32 [[CALL]]
;
%call = tail call i32 @memcmp(i8* dereferenceable_or_null(40) %d, i8* %s, i64 16)
ret i32 %call
}
[NFC] Revisited/updated tests llvm-svn: 368722
2019-08-14 01:07:02 +08:00
define i32 @memcmp_const_size_no_update_deref(i8* nocapture readonly %d, i8* nocapture readonly %s) {
; CHECK-LABEL: @memcmp_const_size_no_update_deref(
; CHECK-NEXT: [[CALL:%.*]] = tail call i32 @memcmp(i8* dereferenceable(40) [[D:%.*]], i8* dereferenceable(20) [[S:%.*]], i64 16)
; CHECK-NEXT: ret i32 [[CALL]]
;
%call = tail call i32 @memcmp(i8* dereferenceable(40) %d, i8* dereferenceable(20) %s, i64 16)
ret i32 %call
}
[SimplifyLibCalls] Add dereferenceable bytes from known callsites Summary: int mm(char *a, char *b) { return memcmp(a,b,16); } Currently: define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 { entry: %call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16) ret i32 %call } After patch: define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 { entry: %call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16) ret i32 %call } Reviewers: jdoerfert, efriedma Reviewed By: jdoerfert Subscribers: javed.absar, spatel, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66079 llvm-svn: 368657
2019-08-13 17:11:49 +08:00
define i32 @memcmp_nonconst_size(i8* nocapture readonly %d, i8* nocapture readonly %s, i64 %n) {
; CHECK-LABEL: @memcmp_nonconst_size(
; CHECK-NEXT: [[CALL:%.*]] = tail call i32 @memcmp(i8* [[D:%.*]], i8* [[S:%.*]], i64 [[N:%.*]])
; CHECK-NEXT: ret i32 [[CALL]]
;
%call = tail call i32 @memcmp(i8* %d, i8* %s, i64 %n)
ret i32 %call
}
define i8* @memcpy_const_size_set_deref(i8* nocapture readonly %d, i8* nocapture readonly %s) {
; CHECK-LABEL: @memcpy_const_size_set_deref(
[BuildLibCalls] Noalias annotation Summary: I think this is better solution than annotating callsites in IC/SLC. Reviewers: jdoerfert Reviewed By: jdoerfert Subscribers: MaskRay, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66217 llvm-svn: 368875
2019-08-15 00:50:06 +08:00
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 1 dereferenceable(64) [[D:%.*]], i8* align 1 dereferenceable(64) [[S:%.*]], i64 64, i1 false)
[SimplifyLibCalls] Add dereferenceable bytes from known callsites Summary: int mm(char *a, char *b) { return memcmp(a,b,16); } Currently: define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 { entry: %call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16) ret i32 %call } After patch: define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 { entry: %call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16) ret i32 %call } Reviewers: jdoerfert, efriedma Reviewed By: jdoerfert Subscribers: javed.absar, spatel, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66079 llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-NEXT: ret i8* [[D]]
;
%call = tail call i8* @memcpy(i8* %d, i8* %s, i64 64)
ret i8* %call
}
define i8* @memmove_const_size_set_deref(i8* nocapture readonly %d, i8* nocapture readonly %s) {
; CHECK-LABEL: @memmove_const_size_set_deref(
; CHECK-NEXT: call void @llvm.memmove.p0i8.p0i8.i64(i8* align 1 dereferenceable(64) [[D:%.*]], i8* align 1 dereferenceable(64) [[S:%.*]], i64 64, i1 false)
; CHECK-NEXT: ret i8* [[D]]
;
%call = tail call i8* @memmove(i8* %d, i8* %s, i64 64)
ret i8* %call
}
define i8* @memset_const_size_set_deref(i8* nocapture readonly %s, i8 %c) {
; CHECK-LABEL: @memset_const_size_set_deref(
; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* align 1 dereferenceable(64) [[S:%.*]], i8 [[C:%.*]], i64 64, i1 false)
; CHECK-NEXT: ret i8* [[S]]
;
%call = tail call i8* @memset(i8* %s, i8 %c, i64 64)
ret i8* %call
}
define i8* @memchr_const_size_set_deref(i8* nocapture readonly %s, i32 %c) {
; CHECK-LABEL: @memchr_const_size_set_deref(
; CHECK-NEXT: [[CALL:%.*]] = tail call i8* @memchr(i8* dereferenceable(64) [[S:%.*]], i32 [[C:%.*]], i64 64)
; CHECK-NEXT: ret i8* [[CALL]]
;
%call = tail call i8* @memchr(i8* %s, i32 %c, i64 64)
ret i8* %call
}
define i8* @llvm_memcpy_const_size_set_deref(i8* nocapture readonly %d, i8* nocapture readonly %s) {
; CHECK-LABEL: @llvm_memcpy_const_size_set_deref(
[BuildLibCalls] Noalias annotation Summary: I think this is better solution than annotating callsites in IC/SLC. Reviewers: jdoerfert Reviewed By: jdoerfert Subscribers: MaskRay, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66217 llvm-svn: 368875
2019-08-15 00:50:06 +08:00
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 1 dereferenceable(16) [[D:%.*]], i8* align 1 dereferenceable(16) [[S:%.*]], i64 16, i1 false)
[SimplifyLibCalls] Add dereferenceable bytes from known callsites Summary: int mm(char *a, char *b) { return memcmp(a,b,16); } Currently: define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 { entry: %call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16) ret i32 %call } After patch: define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 { entry: %call = tail call i32 @memcmp(i8* dereferenceable(16) %a, i8* dereferenceable(16) %b, i64 16) ret i32 %call } Reviewers: jdoerfert, efriedma Reviewed By: jdoerfert Subscribers: javed.absar, spatel, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66079 llvm-svn: 368657
2019-08-13 17:11:49 +08:00
; CHECK-NEXT: ret i8* [[D]]
;
call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 1 %d, i8* align 1 %s, i64 16, i1 false)
ret i8* %d
}
define i8* @llvm_memmove_const_size_set_deref(i8* nocapture readonly %d, i8* nocapture readonly %s) {
; CHECK-LABEL: @llvm_memmove_const_size_set_deref(
; CHECK-NEXT: call void @llvm.memmove.p0i8.p0i8.i64(i8* align 1 dereferenceable(16) [[D:%.*]], i8* align 1 dereferenceable(16) [[S:%.*]], i64 16, i1 false)
; CHECK-NEXT: ret i8* [[D]]
;
call void @llvm.memmove.p0i8.p0i8.i64(i8* align 1 %d, i8* align 1 %s, i64 16, i1 false)
ret i8* %d
}
define i8* @llvm_memset_const_size_set_deref(i8* nocapture readonly %s, i8 %c) {
; CHECK-LABEL: @llvm_memset_const_size_set_deref(
; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* align 1 dereferenceable(16) [[S:%.*]], i8 [[C:%.*]], i64 16, i1 false)
; CHECK-NEXT: ret i8* [[S]]
;
call void @llvm.memset.p0i8.i64(i8* align 1 %s, i8 %c, i64 16, i1 false)
ret i8* %s
}