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7c497afb63
As promised in D35003. Uses -codegenprepare instead of -instcombine since we hit the same buggy path anyway, and CGP lets us keep this test really simple (instcombine likes turning the alloca T, N into alloca [N x T], which hides the bug this is testing for). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@307811 91177308-0d34-0410-b5e6-96231b3b80d8
17 lines
476 B
LLVM
17 lines
476 B
LLVM
; RUN: opt -S -codegenprepare %s -o - | FileCheck %s
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;
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; Ensure that we don't {crash,return a bad value} when given an alloca larger
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; than what a pointer can represent.
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target datalayout = "p:16:16"
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; CHECK-LABEL: @alloca_overflow_is_unknown(
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define i16 @alloca_overflow_is_unknown() {
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%i = alloca i8, i32 65537
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%j = call i16 @llvm.objectsize.i16.p0i8(i8* %i, i1 false, i1 false)
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; CHECK: ret i16 -1
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ret i16 %j
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}
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declare i16 @llvm.objectsize.i16.p0i8(i8*, i1, i1)
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