derek.holloway
7502bf64a4
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48 lines
1.3 KiB
LLVM
48 lines
1.3 KiB
LLVM
; Test that __strlen_chk simplification 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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@hello_no_nul = constant [5 x i8] c"hello"
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declare i32 @__strlen_chk(ptr, i32)
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; Check __strlen_chk(string constant) -> strlen or constants
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; CHECK-LABEL: @unknown_str_known_object_size
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define i32 @unknown_str_known_object_size(ptr %c) {
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; CHECK: call i32 @__strlen_chk
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%1 = call i32 @__strlen_chk(ptr %c, i32 8)
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ret i32 %1
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}
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; CHECK-LABEL: @known_str_known_object_size
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define i32 @known_str_known_object_size(ptr %c) {
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; CHECK: ret i32 5
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%1 = call i32 @__strlen_chk(ptr @hello, i32 6)
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ret i32 %1
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}
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; CHECK-LABEL: @known_str_too_small_object_size
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define i32 @known_str_too_small_object_size(ptr %c) {
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; CHECK: call i32 @__strlen_chk
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%1 = call i32 @__strlen_chk(ptr @hello, i32 5)
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ret i32 %1
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}
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; CHECK-LABEL: @known_str_no_nul
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define i32 @known_str_no_nul(ptr %c) {
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; CHECK: call i32 @__strlen_chk
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%1 = call i32 @__strlen_chk(ptr @hello_no_nul, i32 5)
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ret i32 %1
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}
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; CHECK-LABEL: @unknown_str_unknown_object_size
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define i32 @unknown_str_unknown_object_size(ptr %c) {
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; CHECK: call i32 @strlen
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%1 = call i32 @__strlen_chk(ptr %c, i32 -1)
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ret i32 %1
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}
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