[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
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
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(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
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
define i32 @memcmp_const_size_no_update_deref2(i8* nocapture readonly %d, i8* nocapture readonly %s) {
|
|
|
|
|
; CHECK-LABEL: @memcmp_const_size_no_update_deref2(
|
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
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
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(
|
|
|
|
|
; 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)
|
|
|
|
|
; 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(
|
|
|
|
|
; 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)
|
|
|
|
|
; 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
|
|
|
|
|
}
|
