| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; Test lib call simplification of __strcpy_chk calls with various values |
| ; for src, dst, and slen. |
| ; |
| ; RUN: opt < %s -passes=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 ptr @test_simplify1() { |
| ; CHECK-LABEL: @test_simplify1( |
| ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr noundef nonnull align 1 dereferenceable(12) @a, ptr noundef nonnull align 1 dereferenceable(12) @.str, i32 12, i1 false) |
| ; CHECK-NEXT: ret ptr @a |
| ; |
| |
| %ret = call ptr @__strcpy_chk(ptr @a, ptr @.str, i32 60) |
| ret ptr %ret |
| } |
| |
| define ptr @test_simplify1_tail() { |
| ; CHECK-LABEL: @test_simplify1_tail( |
| ; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i32(ptr noundef nonnull align 1 dereferenceable(12) @a, ptr noundef nonnull align 1 dereferenceable(12) @.str, i32 12, i1 false) |
| ; CHECK-NEXT: ret ptr @a |
| ; |
| |
| %ret = tail call ptr @__strcpy_chk(ptr @a, ptr @.str, i32 60) |
| ret ptr %ret |
| } |
| |
| define ptr @test_simplify2() { |
| ; CHECK-LABEL: @test_simplify2( |
| ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr noundef nonnull align 1 dereferenceable(12) @a, ptr noundef nonnull align 1 dereferenceable(12) @.str, i32 12, i1 false) |
| ; CHECK-NEXT: ret ptr @a |
| ; |
| |
| %ret = call ptr @__strcpy_chk(ptr @a, ptr @.str, i32 12) |
| ret ptr %ret |
| } |
| |
| define ptr @test_simplify3() { |
| ; CHECK-LABEL: @test_simplify3( |
| ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr noundef nonnull align 1 dereferenceable(12) @a, ptr noundef nonnull align 1 dereferenceable(12) @.str, i32 12, i1 false) |
| ; CHECK-NEXT: ret ptr @a |
| ; |
| |
| %ret = call ptr @__strcpy_chk(ptr @a, ptr @.str, i32 -1) |
| ret ptr %ret |
| } |
| |
| ; Check cases where there are no string constants. |
| |
| define ptr @test_simplify4() { |
| ; CHECK-LABEL: @test_simplify4( |
| ; CHECK-NEXT: [[STRCPY:%.*]] = call ptr @strcpy(ptr noundef nonnull dereferenceable(1) @a, ptr noundef nonnull dereferenceable(1) @b) |
| ; CHECK-NEXT: ret ptr @a |
| ; |
| |
| %ret = call ptr @__strcpy_chk(ptr @a, ptr @b, i32 -1) |
| ret ptr %ret |
| } |
| |
| define ptr @test_simplify4_tail() { |
| ; CHECK-LABEL: @test_simplify4_tail( |
| ; CHECK-NEXT: [[STRCPY:%.*]] = tail call ptr @strcpy(ptr noundef nonnull dereferenceable(1) @a, ptr noundef nonnull dereferenceable(1) @b) |
| ; CHECK-NEXT: ret ptr @a |
| ; |
| |
| %ret = tail call ptr @__strcpy_chk(ptr @a, ptr @b, i32 -1) |
| ret ptr %ret |
| } |
| |
| ; Check case where the string length is not constant. |
| |
| define ptr @test_simplify5() { |
| ; CHECK-LABEL: @test_simplify5( |
| ; CHECK-NEXT: [[LEN:%.*]] = call i32 @llvm.objectsize.i32.p0(ptr @a, i1 false, i1 false, i1 false) |
| ; CHECK-NEXT: [[RET:%.*]] = call ptr @__memcpy_chk(ptr nonnull @a, ptr nonnull @.str, i32 12, i32 [[LEN]]) |
| ; CHECK-NEXT: ret ptr [[RET]] |
| ; |
| |
| %len = call i32 @llvm.objectsize.i32.p0(ptr @a, i1 false, i1 false, i1 false) |
| %ret = call ptr @__strcpy_chk(ptr @a, ptr @.str, i32 %len) |
| ret ptr %ret |
| } |
| |
| ; Check case where the source and destination are the same. |
| |
| define ptr @test_simplify6() { |
| ; CHECK-LABEL: @test_simplify6( |
| ; CHECK-NEXT: [[LEN:%.*]] = call i32 @llvm.objectsize.i32.p0(ptr @a, i1 false, i1 false, i1 false) |
| ; CHECK-NEXT: [[RET:%.*]] = call ptr @__strcpy_chk(ptr nonnull @a, ptr nonnull @a, i32 [[LEN]]) |
| ; CHECK-NEXT: ret ptr [[RET]] |
| ; |
| |
| %len = call i32 @llvm.objectsize.i32.p0(ptr @a, i1 false, i1 false, i1 false) |
| %ret = call ptr @__strcpy_chk(ptr @a, ptr @a, i32 %len) |
| ret ptr %ret |
| } |
| |
| ; Check cases where there are no string constants, and is a tail call. |
| |
| define ptr @test_simplify7() { |
| ; CHECK-LABEL: @test_simplify7( |
| ; CHECK-NEXT: [[STRCPY:%.*]] = tail call ptr @strcpy(ptr noundef nonnull dereferenceable(1) @a, ptr noundef nonnull dereferenceable(1) @b) |
| ; CHECK-NEXT: ret ptr @a |
| ; |
| |
| %ret = tail call ptr @__strcpy_chk(ptr @a, ptr @b, i32 -1) |
| ret ptr %ret |
| } |
| |
| ; Check case where slen < strlen (src). |
| |
| define ptr @test_no_simplify1() { |
| ; CHECK-LABEL: @test_no_simplify1( |
| ; CHECK-NEXT: [[RET:%.*]] = call ptr @__strcpy_chk(ptr nonnull @a, ptr nonnull @b, i32 8) |
| ; CHECK-NEXT: ret ptr [[RET]] |
| ; |
| |
| %ret = call ptr @__strcpy_chk(ptr @a, ptr @b, i32 8) |
| ret ptr %ret |
| } |
| |
| define ptr @test_no_simplify2(ptr %dst, ptr %src, i32 %a) { |
| ; CHECK-LABEL: @test_no_simplify2( |
| ; CHECK-NEXT: [[RET:%.*]] = musttail call ptr @__strcpy_chk(ptr [[DST:%.*]], ptr [[SRC:%.*]], i32 60) |
| ; CHECK-NEXT: ret ptr [[RET]] |
| ; |
| %ret = musttail call ptr @__strcpy_chk(ptr %dst, ptr %src, i32 60) |
| ret ptr %ret |
| } |
| |
| declare ptr @__strcpy_chk(ptr, ptr, i32) nounwind |
| declare i32 @llvm.objectsize.i32.p0(ptr, i1, i1, i1) nounwind readonly |