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https://github.com/c64scene-ar/llvm-6502.git
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23e75da7e0
After a lot of discussion, we realized it's not the best option for run-time bounds checking git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157255 91177308-0d34-0410-b5e6-96231b3b80d8
44 lines
1.4 KiB
LLVM
44 lines
1.4 KiB
LLVM
; Test that the StpCpyOptimizer works correctly
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; RUN: opt < %s -simplify-libcalls -S | FileCheck %s
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; This transformation requires the pointer size, as it assumes that size_t is
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; the size of a pointer.
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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-n8:16:32"
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@hello = constant [6 x i8] c"hello\00"
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declare i8* @stpcpy(i8*, i8*)
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declare i8* @__stpcpy_chk(i8*, i8*, i32) nounwind
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declare i32 @llvm.objectsize.i32(i8*, i1) nounwind readonly
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define i32 @t1() {
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; CHECK: @t1
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%target = alloca [1024 x i8]
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%arg1 = getelementptr [1024 x i8]* %target, i32 0, i32 0
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%arg2 = getelementptr [6 x i8]* @hello, i32 0, i32 0
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%rslt1 = call i8* @stpcpy( i8* %arg1, i8* %arg2 )
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; CHECK: @llvm.memcpy.p0i8.p0i8.i32
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ret i32 0
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}
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define i32 @t2() {
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; CHECK: @t2
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%target = alloca [1024 x i8]
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%arg1 = getelementptr [1024 x i8]* %target, i32 0, i32 0
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%arg2 = getelementptr [6 x i8]* @hello, i32 0, i32 0
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%tmp1 = call i32 @llvm.objectsize.i32(i8* %arg1, i1 false)
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%rslt1 = call i8* @__stpcpy_chk(i8* %arg1, i8* %arg2, i32 %tmp1)
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; CHECK: @__memcpy_chk
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ret i32 0
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}
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define i8* @t3(i8* %arg) {
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; CHECK: @t3
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%stpcpy = tail call i8* @stpcpy(i8* %arg, i8* %arg)
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; CHECK: [[LEN:%[a-z]+]] = call i32 @strlen(i8* %arg)
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; CHECK-NEXT: getelementptr inbounds i8* %arg, i32 [[LEN]]
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ret i8* %stpcpy
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}
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