From f843144b28ada08524d795e248cab60d56a0a25d Mon Sep 17 00:00:00 2001 From: Richard Guenther Date: Mon, 15 Oct 2012 11:22:49 +0000 Subject: [PATCH] re PR tree-optimization/54920 (segfault in tree-ssa-pre.c during Firefox build) 2012-10-15 Richard Guenther PR tree-optimization/54920 * tree-ssa-pre.c (create_expression_by_pieces): Properly allocate temporary storage for all NARY elements. * gcc.dg/torture/pr54920.c: New testcase. From-SVN: r192454 --- gcc/ChangeLog | 6 ++++++ gcc/testsuite/ChangeLog | 5 +++++ gcc/testsuite/gcc.dg/torture/pr54920.c | 13 +++++++++++++ gcc/tree-ssa-pre.c | 2 +- 4 files changed, 25 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/gcc.dg/torture/pr54920.c diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 790c69e485c..7447694b610 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2012-10-15 Richard Guenther + + PR tree-optimization/54920 + * tree-ssa-pre.c (create_expression_by_pieces): Properly + allocate temporary storage for all NARY elements. + 2012-10-15 Joern Rennecke * web.c (union_match_dups): Properly handle OP_INOUT match_dups. diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 23f8c2e0dd4..07a052da729 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2012-10-15 Richard Guenther + + PR tree-optimization/54920 + * gcc.dg/torture/pr54920.c: New testcase. + 2012-10-15 Eric Botcazou * gnat.dg/unchecked_convert9.ad[sb]: New test. diff --git a/gcc/testsuite/gcc.dg/torture/pr54920.c b/gcc/testsuite/gcc.dg/torture/pr54920.c new file mode 100644 index 00000000000..d1622f765a7 --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/pr54920.c @@ -0,0 +1,13 @@ +/* { dg-do compile } */ + +typedef short __v8hi __attribute__ ((__vector_size__ (16))); +typedef long long __m128i __attribute__ ((__vector_size__ (16))); +int a; +__m128i b; + +void +fn1 () +{ + while (1) + b = (__m128i) (__v8hi) { a, 0, 0, 0, 0, 0 }; +} diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c index fe9186cefa9..548c110f6d2 100644 --- a/gcc/tree-ssa-pre.c +++ b/gcc/tree-ssa-pre.c @@ -2853,7 +2853,7 @@ create_expression_by_pieces (basic_block block, pre_expr expr, case NARY: { vn_nary_op_t nary = PRE_EXPR_NARY (expr); - tree genop[4]; + tree *genop = XALLOCAVEC (tree, nary->length); unsigned i; for (i = 0; i < nary->length; ++i) {