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; Test a pile of objectsize bounds checking.
; RUN: opt < %s -instcombine -S | FileCheck %s
; We need target data to get the sizes of the arrays and structures.
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 = private global [60 x i8] zeroinitializer, align 1 ; <[60 x i8]*>
@.str = private constant [8 x i8] c"abcdefg\00" ; <[8 x i8]*>
define i32 @foo() nounwind {
; CHECK: @foo
; CHECK-NEXT: ret i32 60
%1 = call i32 @llvm.objectsize.i32(i8* getelementptr inbounds ([60 x i8]* @a, i32 0, i32 0), i1 false)
ret i32 %1
}
define i8* @bar() nounwind {
; CHECK: @bar
entry:
%retval = alloca i8*
%0 = call i32 @llvm.objectsize.i32(i8* getelementptr inbounds ([60 x i8]* @a, i32 0, i32 0), i1 false)
%cmp = icmp ne i32 %0, -1
; CHECK: br i1 true
br i1 %cmp, label %cond.true, label %cond.false
cond.true:
%1 = load i8** %retval;
ret i8* %1;
cond.false:
%2 = load i8** %retval;
ret i8* %2;
}
; FIXME: Should be ret i32 0
define i32 @f() nounwind {
; CHECK: @f
; CHECK-NEXT: llvm.objectsize.i32
%1 = call i32 @llvm.objectsize.i32(i8* getelementptr ([60 x i8]* @a, i32 1, i32 0), i1 false)
ret i32 %1
}
@window = external global [0 x i8]
define i1 @baz() nounwind {
; CHECK: @baz
; CHECK-NEXT: ret i1 true
%1 = tail call i32 @llvm.objectsize.i32(i8* getelementptr inbounds ([0 x i8]* @window, i32 0, i32 0), i1 false)
%2 = icmp eq i32 %1, -1
ret i1 %2
}
declare i32 @llvm.objectsize.i32(i8*, i1) nounwind readonly
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