038d604f4f
Summary: Should be fine for memcpy, strcpy, strncpy. Reviewers: jdoerfert, efriedma Reviewed By: jdoerfert Subscribers: uenoku, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66135 llvm-svn: 368724
79 lines
3.1 KiB
LLVM
79 lines
3.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -instcombine -S < %s | FileCheck %s
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declare i8* @memcpy(i8* nocapture, i8* nocapture, i64)
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declare i8* @strncpy(i8* nocapture, i8* nocapture, i64)
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declare i8* @strcpy(i8* nocapture, i8* nocapture)
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define i8* @memcpy_const_size_noalias(i8* nocapture readonly %d, i8* nocapture readonly %s) {
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; CHECK-LABEL: @memcpy_const_size_noalias(
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; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias align 1 dereferenceable(16) [[D:%.*]], i8* noalias align 1 dereferenceable(16) [[S:%.*]], i64 16, i1 false)
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; CHECK-NEXT: ret i8* [[D]]
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;
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%call = tail call i8* @memcpy(i8* %d, i8* %s, i64 16)
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ret i8* %call
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}
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define i8* @memcpy_const_zero_size_noalias(i8* nocapture readonly %d, i8* nocapture readonly %s) {
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; CHECK-LABEL: @memcpy_const_zero_size_noalias(
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; CHECK-NEXT: ret i8* [[D:%.*]]
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;
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%call = tail call i8* @memcpy(i8* %d, i8* %s, i64 0)
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ret i8* %call
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}
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define i8* @memcpy_nonconst_size_noalias(i8* nocapture readonly %d, i8* nocapture readonly %s, i64 %n) {
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; CHECK-LABEL: @memcpy_nonconst_size_noalias(
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; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias align 1 [[D:%.*]], i8* noalias align 1 [[S:%.*]], i64 [[N:%.*]], i1 false)
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; CHECK-NEXT: ret i8* [[D]]
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;
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%call = tail call i8* @memcpy(i8* %d, i8* %s, i64 %n)
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ret i8* %call
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}
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define i8* @strncpy_const_size_noalias(i8* nocapture readonly %d, i8* nocapture readonly %s) {
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; CHECK-LABEL: @strncpy_const_size_noalias(
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; CHECK-NEXT: [[CALL:%.*]] = tail call i8* @strncpy(i8* noalias [[D:%.*]], i8* noalias [[S:%.*]], i64 16)
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; CHECK-NEXT: ret i8* [[CALL]]
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;
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%call = tail call i8* @strncpy(i8* %d, i8* %s, i64 16)
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ret i8* %call
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}
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define i8* @strncpy_const_zero_size_noalias(i8* nocapture readonly %d, i8* nocapture readonly %s) {
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; CHECK-LABEL: @strncpy_const_zero_size_noalias(
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; CHECK-NEXT: [[CALL:%.*]] = tail call i8* @strncpy(i8* noalias [[D:%.*]], i8* noalias [[S:%.*]], i64 0)
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; CHECK-NEXT: ret i8* [[CALL]]
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;
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%call = tail call i8* @strncpy(i8* %d, i8* %s, i64 0)
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ret i8* %call
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}
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define i8* @strncpy_nonconst_size_noalias(i8* nocapture readonly %d, i8* nocapture readonly %s, i64 %n) {
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; CHECK-LABEL: @strncpy_nonconst_size_noalias(
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; CHECK-NEXT: [[CALL:%.*]] = tail call i8* @strncpy(i8* noalias [[D:%.*]], i8* noalias [[S:%.*]], i64 [[N:%.*]])
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; CHECK-NEXT: ret i8* [[CALL]]
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;
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%call = tail call i8* @strncpy(i8* %d, i8* %s, i64 %n)
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ret i8* %call
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}
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define i8* @strcpy_const_size_noalias(i8* nocapture readonly %d, i8* nocapture readonly %s) {
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; CHECK-LABEL: @strcpy_const_size_noalias(
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; CHECK-NEXT: [[CALL:%.*]] = tail call i8* @strcpy(i8* noalias [[D:%.*]], i8* noalias [[S:%.*]])
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; CHECK-NEXT: ret i8* [[CALL]]
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;
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%call = tail call i8* @strcpy(i8* %d, i8* %s)
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ret i8* %call
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}
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define i8* @strcpy_nonconst_size_noalias(i8* nocapture readonly %d, i8* nocapture readonly %s) {
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; CHECK-LABEL: @strcpy_nonconst_size_noalias(
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; CHECK-NEXT: [[CALL:%.*]] = tail call i8* @strcpy(i8* noalias [[D:%.*]], i8* noalias [[S:%.*]])
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; CHECK-NEXT: ret i8* [[CALL]]
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;
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%call = tail call i8* @strcpy(i8* %d, i8* %s)
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ret i8* %call
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}
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