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| author | Richard Biener <rguenther@suse.de> | 2018-02-08 13:29:15 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2018-02-08 13:29:15 +0000 |
| commit | 24db2556253540529a7b11ed42683b2ea9bb8989 (patch) | |
| tree | c5f4c37badfc0bb93dd13c20c4b36192bb6013a5 /gcc/tree-ssa-phiprop.c | |
| parent | 3d2249215e948493d5aa7ad1aaaa9d9de73207c6 (diff) | |
| download | gcc-24db2556253540529a7b11ed42683b2ea9bb8989.zip gcc-24db2556253540529a7b11ed42683b2ea9bb8989.tar.gz gcc-24db2556253540529a7b11ed42683b2ea9bb8989.tar.bz2 | |
re PR middle-end/84233 (ICE (segfault) in gimple_assign_rhs_code)
2018-02-08 Richard Biener <rguenther@suse.de>
PR tree-optimization/84233
* tree-ssa-phiprop.c (propagate_with_phi): Use separate
changed flag instead of boguously re-using phi_inserted.
* g++.dg/torture/pr84233.C: New testcase.
From-SVN: r257486
Diffstat (limited to 'gcc/tree-ssa-phiprop.c')
| -rw-r--r-- | gcc/tree-ssa-phiprop.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/gcc/tree-ssa-phiprop.c b/gcc/tree-ssa-phiprop.c index fad81d0..03dbb39 100644 --- a/gcc/tree-ssa-phiprop.c +++ b/gcc/tree-ssa-phiprop.c @@ -270,6 +270,7 @@ propagate_with_phi (basic_block bb, gphi *phi, struct phiprop_d *phivn, use_operand_p arg_p, use; ssa_op_iter i; bool phi_inserted; + bool changed; tree type = NULL_TREE; if (!POINTER_TYPE_P (TREE_TYPE (ptr)) @@ -317,6 +318,7 @@ propagate_with_phi (basic_block bb, gphi *phi, struct phiprop_d *phivn, /* Replace the first dereference of *ptr if there is one and if we can move the loads to the place of the ptr phi node. */ phi_inserted = false; + changed = false; FOR_EACH_IMM_USE_STMT (use_stmt, ui, ptr) { gimple *def_stmt; @@ -403,7 +405,7 @@ propagate_with_phi (basic_block bb, gphi *phi, struct phiprop_d *phivn, unlink_stmt_vdef (use_stmt); gsi_remove (&gsi, true); - phi_inserted = true; + changed = true; } /* Found a proper dereference. Insert a phi node if this @@ -424,6 +426,7 @@ propagate_with_phi (basic_block bb, gphi *phi, struct phiprop_d *phivn, gsi_remove (&gsi, true); phi_inserted = true; + changed = true; } else { @@ -431,13 +434,14 @@ propagate_with_phi (basic_block bb, gphi *phi, struct phiprop_d *phivn, load. */ gimple_assign_set_rhs1 (use_stmt, res); update_stmt (use_stmt); + changed = true; } next:; /* Continue searching for a proper dereference. */ } - return phi_inserted; + return changed; } /* Main entry for phiprop pass. */ |