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gcc: add patch to fix PR48805

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Signed-off-by: Stephan Raue <stephan@openelec.tv>
This commit is contained in:
Stephan Raue 2011-10-31 15:39:53 +01:00
parent 8040edfd91
commit e31438a86b
1 changed files with 89 additions and 0 deletions
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packages/toolchain/lang/gcc/patches/gcc-4.6.2-PR48805_Do_not_instantiate_ADDR_EXPRs.patch Normal file
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@ -0,0 +1,89 @@
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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
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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