/packages/toolchain/lang/gcc/patches/gcc-4.6.2-PR48805_Do_not_instantiate_ADDR_EXPRs.patch
http://github.com/OpenELEC/OpenELEC.tv · Patch · 89 lines · 80 code · 9 blank · 0 comment · 0 complexity · 1cae8ecc833250f3e8e69ca396b5d31f MD5 · raw file
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- From: Sebastian Pop <sebpop at gmail dot com>
- To: gcc-patches at gcc dot gnu dot org
- Cc: rguenther at suse dot de, Sebastian Pop <sebpop at gmail dot com>
- Subject: [PATCH] Fix PR48805: Do not instantiate ADDR_EXPRs
- Date: Sat, 23 Jul 2011 09:35:56 -0500
- Message-Id: <1311431756-16262-1-git-send-email-sebpop@gmail.com>
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- With this patch we avoid instantiating ADDR_EXPR: it makes no sense
- to translate b[i] into b[{0, +, 1}_1].
- Bootstrapped and tested on amd64-linux.
- 2011-07-22 Sebastian Pop <sebastian.pop@amd.com>
- PR middle-end/48805
- * tree-scalar-evolution.c (instantiate_scev_r): Return
- chrec_dont_know for ADDR_EXPR.
- * gcc.dg/graphite/id-pr48805.c: New.
- ---
- gcc/ChangeLog | 6 ++++++
- gcc/testsuite/ChangeLog | 5 +++++
- gcc/testsuite/gcc.dg/graphite/id-pr48805.c | 20 ++++++++++++++++++++
- gcc/tree-scalar-evolution.c | 1 +
- 4 files changed, 32 insertions(+), 0 deletions(-)
- create mode 100644 gcc/testsuite/gcc.dg/graphite/id-pr48805.c
- diff --git a/gcc/testsuite/gcc.dg/graphite/id-pr48805.c b/gcc/testsuite/gcc.dg/graphite/id-pr48805.c
- new file mode 100644
- index 0000000..f13a828
- --- /dev/null
- +++ b/gcc/testsuite/gcc.dg/graphite/id-pr48805.c
- @@ -0,0 +1,20 @@
- +void *A(const void *a);
- +void C(void);
- +
- +static void B(unsigned short a[])
- +{
- + long i, j, tmp;
- +
- + for(i = 0; i < 3; i++) {
- + for(j = 1; j <= 3; j++)
- + tmp -= a[i - j];
- +
- + a[i] = (unsigned short)(tmp >> 1);
- + }
- +}
- +void C(void)
- +{
- + unsigned short a[3], b[3];
- + B(b + 1);
- + A(a);
- +}
- diff --git a/gcc/tree-scalar-evolution.c b/gcc/tree-scalar-evolution.c
- index bfa8c93..00fcd3f 100644
- --- a/gcc/tree-scalar-evolution.c
- +++ b/gcc/tree-scalar-evolution.c
- @@ -2645,6 +2645,7 @@ instantiate_scev_r (basic_block instantiate_below,
- TREE_OPERAND (chrec, 0),
- fold_conversions, cache, size_expr);
-
- + case ADDR_EXPR:
- case SCEV_NOT_KNOWN:
- return chrec_dont_know;
-
- --
- 1.7.4.1