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| author | Richard Biener <rguenther@suse.de> | 2017-04-03 12:22:22 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2017-04-03 12:22:22 +0000 |
| commit | fff80893baad08414ee4332655f4ed5f557ae73a (patch) | |
| tree | c393e51a8f85766a92462266c85a8b6bbb3e0794 /gcc | |
| parent | 0be1d23cc32369d48c93a795a07d4fa037f14d5c (diff) | |
| download | gcc-fff80893baad08414ee4332655f4ed5f557ae73a.zip gcc-fff80893baad08414ee4332655f4ed5f557ae73a.tar.gz gcc-fff80893baad08414ee4332655f4ed5f557ae73a.tar.bz2 | |
re PR tree-optimization/80275 (Poor (but valid) code generated by optimizer passing optimizer list to function)
2017-04-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/80275
* fold-const.c (split_address_to_core_and_offset): Handle
POINTER_PLUS_EXPR.
* g++.dg/opt/pr80275.C: New testcase.
From-SVN: r246648
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/fold-const.c | 18 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/g++.dg/opt/pr80275.C | 16 |
4 files changed, 45 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 89b3d0d..30daa0d 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2017-04-03 Richard Biener <rguenther@suse.de> + + PR tree-optimization/80275 + * fold-const.c (split_address_to_core_and_offset): Handle + POINTER_PLUS_EXPR. + 2017-04-03 Eric Botcazou <ebotcazou@adacore.com> * tree-nested.c (get_descriptor_type): Make sure that the alignment of diff --git a/gcc/fold-const.c b/gcc/fold-const.c index fb54ffa..7c05e0f 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -14341,6 +14341,24 @@ split_address_to_core_and_offset (tree exp, &volatilep); core = build_fold_addr_expr_loc (loc, core); } + else if (TREE_CODE (exp) == POINTER_PLUS_EXPR) + { + core = TREE_OPERAND (exp, 0); + STRIP_NOPS (core); + *pbitpos = 0; + *poffset = TREE_OPERAND (exp, 1); + if (TREE_CODE (*poffset) == INTEGER_CST) + { + offset_int tem = wi::sext (wi::to_offset (*poffset), + TYPE_PRECISION (TREE_TYPE (*poffset))); + tem <<= LOG2_BITS_PER_UNIT; + if (wi::fits_shwi_p (tem)) + { + *pbitpos = tem.to_shwi (); + *poffset = NULL_TREE; + } + } + } else { core = exp; diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index c0fc1eb..55d4f44 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2017-04-03 Richard Biener <rguenther@suse.de> + + PR tree-optimization/80275 + * g++.dg/opt/pr80275.C: New testcase. + 2017-04-03 Dominik Vogt <vogt@linux.vnet.ibm.com> PR testsuite/79356 diff --git a/gcc/testsuite/g++.dg/opt/pr80275.C b/gcc/testsuite/g++.dg/opt/pr80275.C new file mode 100644 index 0000000..7296a07 --- /dev/null +++ b/gcc/testsuite/g++.dg/opt/pr80275.C @@ -0,0 +1,16 @@ +// { dg-do compile { target c++14 } } +// { dg-options "-O2 -fdump-tree-optimized" } + +#include <algorithm> + +int g() +{ + return 1234; +} + +int f2() +{ + return std::min({1, g(), 4}); +} + +// { dg-final { scan-tree-dump "return 1;" "optimized" } } |