105 lines
3.5 KiB
LLVM
105 lines
3.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; Test that the strncat libcall simplifier works correctly.
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;
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
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@hello = constant [6 x i8] c"hello\00"
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@empty = constant [1 x i8] c"\00"
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@a = common global [32 x i8] zeroinitializer, align 1
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declare ptr @strncat(ptr, ptr, i32)
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define void @test_simplify1() {
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; CHECK-LABEL: @test_simplify1(
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; CHECK-NEXT: [[STRLEN:%.*]] = call i32 @strlen(ptr noundef nonnull dereferenceable(1) @a)
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; CHECK-NEXT: [[ENDPTR:%.*]] = getelementptr inbounds i8, ptr @a, i32 [[STRLEN]]
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; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr noundef nonnull align 1 dereferenceable(6) [[ENDPTR]], ptr noundef nonnull align 1 dereferenceable(6) @hello, i32 6, i1 false)
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; CHECK-NEXT: ret void
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;
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call ptr @strncat(ptr @a, ptr @hello, i32 13)
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ret void
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}
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define void @test_simplify2() {
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; CHECK-LABEL: @test_simplify2(
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; CHECK-NEXT: ret void
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;
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call ptr @strncat(ptr @a, ptr @empty, i32 13)
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ret void
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}
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define void @test_simplify3() {
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; CHECK-LABEL: @test_simplify3(
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; CHECK-NEXT: ret void
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;
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call ptr @strncat(ptr @a, ptr @hello, i32 0)
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ret void
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}
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define void @test_nosimplify1() {
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; CHECK-LABEL: @test_nosimplify1(
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; CHECK-NEXT: [[TMP1:%.*]] = call ptr @strncat(ptr noundef nonnull dereferenceable(1) @a, ptr noundef nonnull dereferenceable(6) @hello, i32 1)
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; CHECK-NEXT: ret void
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;
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call ptr @strncat(ptr @a, ptr @hello, i32 1)
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ret void
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}
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; strncat(nonnull x, nonnull y, n) -> strncat(nonnull x, y, n)
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define ptr @test1(ptr %str1, ptr %str2, i32 %n) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: [[TEMP1:%.*]] = call ptr @strncat(ptr noundef nonnull dereferenceable(1) [[STR1:%.*]], ptr nonnull [[STR2:%.*]], i32 [[N:%.*]])
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; CHECK-NEXT: ret ptr [[TEMP1]]
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;
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%temp1 = call ptr @strncat(ptr nonnull %str1, ptr nonnull %str2, i32 %n)
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ret ptr %temp1
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}
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; strncat(x, y, 0) -> x
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define ptr @test2(ptr %str1, ptr %str2, i32 %n) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: ret ptr [[STR1:%.*]]
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;
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%temp1 = call ptr @strncat(ptr %str1, ptr %str2, i32 0)
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ret ptr %temp1
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}
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; strncat(x, y, 5) -> strncat(nonnull x, nonnull y, 5)
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define ptr @test3(ptr %str1, ptr %str2, i32 %n) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: [[TEMP1:%.*]] = call ptr @strncat(ptr noundef nonnull dereferenceable(1) [[STR1:%.*]], ptr noundef nonnull dereferenceable(1) [[STR2:%.*]], i32 5)
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; CHECK-NEXT: ret ptr [[TEMP1]]
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;
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%temp1 = call ptr @strncat(ptr %str1, ptr %str2, i32 5)
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ret ptr %temp1
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}
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define ptr @test4(ptr %str1, ptr %str2, i32 %n) null_pointer_is_valid {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: [[TEMP1:%.*]] = call ptr @strncat(ptr noundef [[STR1:%.*]], ptr [[STR2:%.*]], i32 [[N:%.*]])
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; CHECK-NEXT: ret ptr [[TEMP1]]
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;
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%temp1 = call ptr @strncat(ptr %str1, ptr %str2, i32 %n)
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ret ptr %temp1
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}
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define ptr @test5(ptr %str, i32 %n) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: [[STRLEN:%.*]] = call i32 @strlen(ptr noundef nonnull dereferenceable(1) [[STR:%.*]])
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; CHECK-NEXT: [[ENDPTR:%.*]] = getelementptr inbounds i8, ptr [[STR]], i32 [[STRLEN]]
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; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr noundef nonnull align 1 dereferenceable(6) [[ENDPTR]], ptr noundef nonnull align 1 dereferenceable(6) @hello, i32 6, i1 false)
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; CHECK-NEXT: ret ptr [[STR]]
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;
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%temp1 = call ptr @strncat(ptr %str, ptr @hello, i32 10)
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ret ptr %temp1
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}
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