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| author | Jakub Jelinek <jakub@redhat.com> | 2013-08-14 22:34:56 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2013-08-14 22:34:56 +0200 |
| commit | 4ca890e22e169bdbb2399d0c6b7c98111164e86a (patch) | |
| tree | bc091b34fe7a11663b0a6d55cd12119c1f69c179 /gcc/tree-sra.c | |
| parent | a7991d53a7672c78f554e31232dcdc0ef8b0e903 (diff) | |
| download | gcc-4ca890e22e169bdbb2399d0c6b7c98111164e86a.zip gcc-4ca890e22e169bdbb2399d0c6b7c98111164e86a.tar.gz gcc-4ca890e22e169bdbb2399d0c6b7c98111164e86a.tar.bz2 | |
re PR middle-end/58145 (volatileness of write is discarded, perhaps in "lim1" related to loop optimizations)
PR tree-optimization/58145
* tree-sra.c (build_ref_for_offset): If prev_base has
TREE_THIS_VOLATILE or TREE_SIDE_EFFECTS, propagate it to MEM_REF.
* gcc.dg/pr58145-1.c: New test.
* gcc.dg/pr58145-2.c: New test.
From-SVN: r201748
Diffstat (limited to 'gcc/tree-sra.c')
| -rw-r--r-- | gcc/tree-sra.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gcc/tree-sra.c b/gcc/tree-sra.c index 2bce848..8e3bb81 100644 --- a/gcc/tree-sra.c +++ b/gcc/tree-sra.c @@ -1466,6 +1466,7 @@ build_ref_for_offset (location_t loc, tree base, HOST_WIDE_INT offset, { tree prev_base = base; tree off; + tree mem_ref; HOST_WIDE_INT base_offset; unsigned HOST_WIDE_INT misalign; unsigned int align; @@ -1516,7 +1517,12 @@ build_ref_for_offset (location_t loc, tree base, HOST_WIDE_INT offset, if (align < TYPE_ALIGN (exp_type)) exp_type = build_aligned_type (exp_type, align); - return fold_build2_loc (loc, MEM_REF, exp_type, base, off); + mem_ref = fold_build2_loc (loc, MEM_REF, exp_type, base, off); + if (TREE_THIS_VOLATILE (prev_base)) + TREE_THIS_VOLATILE (mem_ref) = 1; + if (TREE_SIDE_EFFECTS (prev_base)) + TREE_SIDE_EFFECTS (mem_ref) = 1; + return mem_ref; } /* Construct a memory reference to a part of an aggregate BASE at the given |