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415326b4ed
enable constant 0 offset lowering. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95691 91177308-0d34-0410-b5e6-96231b3b80d8
52 lines
1.5 KiB
LLVM
52 lines
1.5 KiB
LLVM
; Test a pile of objectsize bounds checking.
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; RUN: opt < %s -instcombine -S | FileCheck %s
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; We need target data to get the sizes of the arrays and structures.
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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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@a = private global [60 x i8] zeroinitializer, align 1 ; <[60 x i8]*>
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@.str = private constant [8 x i8] c"abcdefg\00" ; <[8 x i8]*>
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define i32 @foo() nounwind {
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; CHECK: @foo
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; CHECK-NEXT: ret i32 60
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%1 = call i32 @llvm.objectsize.i32(i8* getelementptr inbounds ([60 x i8]* @a, i32 0, i32 0), i1 false)
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ret i32 %1
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}
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define i8* @bar() nounwind {
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; CHECK: @bar
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entry:
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%retval = alloca i8*
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%0 = call i32 @llvm.objectsize.i32(i8* getelementptr inbounds ([60 x i8]* @a, i32 0, i32 0), i1 false)
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%cmp = icmp ne i32 %0, -1
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; CHECK: br i1 true
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br i1 %cmp, label %cond.true, label %cond.false
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cond.true:
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%1 = load i8** %retval;
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ret i8* %1;
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cond.false:
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%2 = load i8** %retval;
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ret i8* %2;
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}
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; FIXME: Should be ret i32 0
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define i32 @f() nounwind {
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; CHECK: @f
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; CHECK-NEXT: llvm.objectsize.i32
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%1 = call i32 @llvm.objectsize.i32(i8* getelementptr ([60 x i8]* @a, i32 1, i32 0), i1 false)
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ret i32 %1
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}
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@window = external global [0 x i8]
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define i1 @baz() nounwind {
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; CHECK: @baz
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; CHECK-NEXT: ret i1 true
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%1 = tail call i32 @llvm.objectsize.i32(i8* getelementptr inbounds ([0 x i8]* @window, i32 0, i32 0), i1 false)
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%2 = icmp eq i32 %1, -1
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ret i1 %2
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}
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declare i32 @llvm.objectsize.i32(i8*, i1) nounwind readonly |