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add a testcase for a bug Duncan pointed out.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46372 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner 2008-01-25 22:36:24 +00:00
parent 255bd2852b
commit 0298dbf019
1 changed files with 10 additions and 0 deletions
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test/CFrontend/2008-01-25-ByValReadNone.c Normal file
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// RUN: %llvmgcc -O3 -S -o - -emit-llvm %s | grep readonly
// RUN: %llvmgcc -O3 -S -o - -emit-llvm %s | not grep readnone
// The struct being passed byval means that we need to mark the
// function readonly instead of readnone. Readnone would allow
// stores to the arg to be deleted in the caller.
struct S { int A[1000]; };
int __attribute__ ((const)) f(struct S x) { return x.A[0]; }