| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; Test lib call simplification of __stpcpy_chk calls with various values |
| ; for src, dst, and slen. |
| ; |
| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| |
| 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" |
| |
| @a = common global [60 x i8] zeroinitializer, align 1 |
| @b = common global [60 x i8] zeroinitializer, align 1 |
| @.str = private constant [12 x i8] c"abcdefghijk\00" |
| |
| ; Check cases where slen >= strlen (src). |
| |
| define i8* @test_simplify1() { |
| ; CHECK-LABEL: @test_simplify1( |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* noundef nonnull align 1 dereferenceable(12) getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* noundef nonnull align 1 dereferenceable(12) getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i32 12, i1 false) |
| ; CHECK-NEXT: ret i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 11) |
| ; |
| %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0 |
| %src = getelementptr inbounds [12 x i8], [12 x i8]* @.str, i32 0, i32 0 |
| |
| %ret = call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 60) |
| ret i8* %ret |
| } |
| |
| define i8* @test_simplify2() { |
| ; CHECK-LABEL: @test_simplify2( |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* noundef nonnull align 1 dereferenceable(12) getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* noundef nonnull align 1 dereferenceable(12) getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i32 12, i1 false) |
| ; CHECK-NEXT: ret i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 11) |
| ; |
| %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0 |
| %src = getelementptr inbounds [12 x i8], [12 x i8]* @.str, i32 0, i32 0 |
| |
| %ret = call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 12) |
| ret i8* %ret |
| } |
| |
| define i8* @test_simplify3() { |
| ; CHECK-LABEL: @test_simplify3( |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* noundef nonnull align 1 dereferenceable(12) getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* noundef nonnull align 1 dereferenceable(12) getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i32 12, i1 false) |
| ; CHECK-NEXT: ret i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 11) |
| ; |
| %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0 |
| %src = getelementptr inbounds [12 x i8], [12 x i8]* @.str, i32 0, i32 0 |
| |
| %ret = call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 -1) |
| ret i8* %ret |
| } |
| |
| ; Check cases where there are no string constants. |
| |
| define i8* @test_simplify4() { |
| ; CHECK-LABEL: @test_simplify4( |
| ; CHECK-NEXT: [[STPCPY:%.*]] = call i8* @stpcpy(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* getelementptr inbounds ([60 x i8], [60 x i8]* @b, i32 0, i32 0)) |
| ; CHECK-NEXT: ret i8* [[STPCPY]] |
| ; |
| %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0 |
| %src = getelementptr inbounds [60 x i8], [60 x i8]* @b, i32 0, i32 0 |
| |
| %ret = call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 -1) |
| ret i8* %ret |
| } |
| |
| ; Check case where the string length is not constant. |
| |
| define i8* @test_simplify5() { |
| ; CHECK-LABEL: @test_simplify5( |
| ; CHECK-NEXT: [[LEN:%.*]] = call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i1 false, i1 false, i1 false) |
| ; CHECK-NEXT: [[TMP1:%.*]] = call i8* @__memcpy_chk(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i32 12, i32 [[LEN]]) |
| ; CHECK-NEXT: ret i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 11) |
| ; |
| %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0 |
| %src = getelementptr inbounds [12 x i8], [12 x i8]* @.str, i32 0, i32 0 |
| |
| %len = call i32 @llvm.objectsize.i32.p0i8(i8* %dst, i1 false, i1 false, i1 false) |
| %ret = call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 %len) |
| ret i8* %ret |
| } |
| |
| ; Check case where the source and destination are the same. |
| |
| define i8* @test_simplify6() { |
| ; CHECK-LABEL: @test_simplify6( |
| ; CHECK-NEXT: [[STRLEN:%.*]] = call i32 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0)) |
| ; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 [[STRLEN]] |
| ; CHECK-NEXT: ret i8* [[TMP1]] |
| ; |
| %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0 |
| |
| %len = call i32 @llvm.objectsize.i32.p0i8(i8* %dst, i1 false, i1 false, i1 false) |
| %ret = call i8* @__stpcpy_chk(i8* %dst, i8* %dst, i32 %len) |
| ret i8* %ret |
| } |
| |
| ; Check case where slen < strlen (src). |
| |
| define i8* @test_no_simplify1() { |
| ; CHECK-LABEL: @test_no_simplify1( |
| ; CHECK-NEXT: [[RET:%.*]] = call i8* @__stpcpy_chk(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* getelementptr inbounds ([60 x i8], [60 x i8]* @b, i32 0, i32 0), i32 8) |
| ; CHECK-NEXT: ret i8* [[RET]] |
| ; |
| %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0 |
| %src = getelementptr inbounds [60 x i8], [60 x i8]* @b, i32 0, i32 0 |
| |
| %ret = call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 8) |
| ret i8* %ret |
| } |
| |
| declare i8* @__stpcpy_chk(i8*, i8*, i32) nounwind |
| declare i32 @llvm.objectsize.i32.p0i8(i8*, i1, i1, i1) nounwind readonly |