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1; Test that __strlen_chk simplification works correctly.2;3; RUN: opt < %s -passes=instcombine -S | FileCheck %s4 5target 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"6 7@hello = constant [6 x i8] c"hello\00"8@hello_no_nul = constant [5 x i8] c"hello"9 10declare i32 @__strlen_chk(ptr, i32)11 12; Check __strlen_chk(string constant) -> strlen or constants13 14; CHECK-LABEL: @unknown_str_known_object_size15define i32 @unknown_str_known_object_size(ptr %c) {16 ; CHECK: call i32 @__strlen_chk17 %1 = call i32 @__strlen_chk(ptr %c, i32 8)18 ret i32 %119}20 21; CHECK-LABEL: @known_str_known_object_size22define i32 @known_str_known_object_size(ptr %c) {23 ; CHECK: ret i32 524 %1 = call i32 @__strlen_chk(ptr @hello, i32 6)25 ret i32 %126}27 28; CHECK-LABEL: @known_str_too_small_object_size29define i32 @known_str_too_small_object_size(ptr %c) {30 ; CHECK: call i32 @__strlen_chk31 %1 = call i32 @__strlen_chk(ptr @hello, i32 5)32 ret i32 %133}34 35; CHECK-LABEL: @known_str_no_nul36define i32 @known_str_no_nul(ptr %c) {37 ; CHECK: call i32 @__strlen_chk38 %1 = call i32 @__strlen_chk(ptr @hello_no_nul, i32 5)39 ret i32 %140}41 42; CHECK-LABEL: @unknown_str_unknown_object_size43define i32 @unknown_str_unknown_object_size(ptr %c) {44 ; CHECK: call i32 @strlen45 %1 = call i32 @__strlen_chk(ptr %c, i32 -1)46 ret i32 %147}48