30 lines
932 B
LLVM
30 lines
932 B
LLVM
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; RUN: opt < %s -instcombine -S | FileCheck %s
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;
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; The idea is that we want to have sane semantics (e.g. not assertion failures)
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; when given an allocsize function that takes a 64-bit argument in the face of
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; 32-bit pointers.
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target datalayout="e-p:32:32:32"
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declare i8* @my_malloc(i8*, i64) allocsize(1)
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define void @test_malloc(i8** %p, i32* %r) {
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%1 = call i8* @my_malloc(i8* null, i64 100)
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store i8* %1, i8** %p, align 8 ; To ensure objectsize isn't killed
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%2 = call i32 @llvm.objectsize.i32.p0i8(i8* %1, i1 false)
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; CHECK: store i32 100
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store i32 %2, i32* %r, align 8
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; Big number is 5 billion.
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%3 = call i8* @my_malloc(i8* null, i64 5000000000)
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store i8* %3, i8** %p, align 8 ; To ensure objectsize isn't killed
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; CHECK: call i32 @llvm.objectsize
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%4 = call i32 @llvm.objectsize.i32.p0i8(i8* %3, i1 false)
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store i32 %4, i32* %r, align 8
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ret void
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}
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declare i32 @llvm.objectsize.i32.p0i8(i8*, i1)
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