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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=instcombine -S < %s | FileCheck %s
define ptr @memcpy_nonconst_n(ptr %d, ptr nocapture readonly %s, i64 %n) {
; CHECK-LABEL: @memcpy_nonconst_n(
; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 [[D:%.*]], ptr align 1 [[S:%.*]], i64 [[N:%.*]], i1 false)
; CHECK-NEXT: [[R:%.*]] = getelementptr inbounds i8, ptr [[D]], i64 [[N]]
; CHECK-NEXT: ret ptr [[R]]
;
%r = tail call ptr @mempcpy(ptr %d, ptr %s, i64 %n)
ret ptr %r
}
define ptr @memcpy_nonconst_n_copy_attrs(ptr %d, ptr nocapture readonly %s, i64 %n) {
; CHECK-LABEL: @memcpy_nonconst_n_copy_attrs(
; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 dereferenceable(16) [[D:%.*]], ptr align 1 [[S:%.*]], i64 [[N:%.*]], i1 false)
; CHECK-NEXT: [[R:%.*]] = getelementptr inbounds i8, ptr [[D]], i64 [[N]]
; CHECK-NEXT: ret ptr [[R]]
;
%r = tail call ptr @mempcpy(ptr dereferenceable(16) %d, ptr %s, i64 %n)
ret ptr %r
}
define void @memcpy_nonconst_n_unused_retval(ptr %d, ptr nocapture readonly %s, i64 %n) {
; CHECK-LABEL: @memcpy_nonconst_n_unused_retval(
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 1 [[D:%.*]], ptr align 1 [[S:%.*]], i64 [[N:%.*]], i1 false)
; CHECK-NEXT: ret void
;
call ptr @mempcpy(ptr %d, ptr %s, i64 %n)
ret void
}
define ptr @memcpy_small_const_n(ptr %d, ptr nocapture readonly %s) {
; CHECK-LABEL: @memcpy_small_const_n(
; CHECK-NEXT: [[TMP1:%.*]] = load i64, ptr [[S:%.*]], align 1
; CHECK-NEXT: store i64 [[TMP1]], ptr [[D:%.*]], align 1
; CHECK-NEXT: [[R:%.*]] = getelementptr inbounds nuw i8, ptr [[D]], i64 8
; CHECK-NEXT: ret ptr [[R]]
;
%r = tail call ptr @mempcpy(ptr %d, ptr %s, i64 8)
ret ptr %r
}
define ptr @memcpy_big_const_n(ptr %d, ptr nocapture readonly %s) {
; CHECK-LABEL: @memcpy_big_const_n(
; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(1024) [[D:%.*]], ptr noundef nonnull align 1 dereferenceable(1024) [[S:%.*]], i64 1024, i1 false)
; CHECK-NEXT: [[R:%.*]] = getelementptr inbounds nuw i8, ptr [[D]], i64 1024
; CHECK-NEXT: ret ptr [[R]]
;
%r = tail call ptr @mempcpy(ptr %d, ptr %s, i64 1024)
ret ptr %r
}
; The original call may have attributes that can not propagate to memcpy.
define i32 @PR48810() {
; CHECK-LABEL: @PR48810(
; CHECK-NEXT: store i1 true, ptr poison, align 1
; CHECK-NEXT: ret i32 undef
;
%r = call dereferenceable(1) ptr @mempcpy(ptr undef, ptr null, i64 undef)
ret i32 undef
}
define ptr @memcpy_no_simplify1(ptr %d, ptr nocapture readonly %s, i64 %n) {
; CHECK-LABEL: @memcpy_no_simplify1(
; CHECK-NEXT: [[R:%.*]] = musttail call ptr @mempcpy(ptr [[D:%.*]], ptr [[S:%.*]], i64 [[N:%.*]])
; CHECK-NEXT: ret ptr [[R]]
;
%r = musttail call ptr @mempcpy(ptr %d, ptr %s, i64 %n)
ret ptr %r
}
declare ptr @mempcpy(ptr, ptr nocapture readonly, i64)
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