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| author | Richard Henderson <rth@redhat.com> | 2004-09-29 18:22:07 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2004-09-29 18:22:07 -0700 |
| commit | e670d9e4cec6b4d18e98bf8e0fddc0373d781c9f (patch) | |
| tree | bfe96a23c68a90b5da0a5b5bfb8294fbe08ac645 /gcc/tree-ssa-copy.c | |
| parent | 67a741463c0555aea1acb65ebe874ad914fd96cf (diff) | |
| download | gcc-e670d9e4cec6b4d18e98bf8e0fddc0373d781c9f.zip gcc-e670d9e4cec6b4d18e98bf8e0fddc0373d781c9f.tar.gz gcc-e670d9e4cec6b4d18e98bf8e0fddc0373d781c9f.tar.bz2 | |
re PR tree-optimization/17739 (tree-optimizers extend the lifetime of a hard register variable)
PR 17739
* tree-gimple.c (is_gimple_reg): Reject hard registers.
(is_gimple_asm_val): New.
* tree-gimple.h (is_gimple_asm_val): Declare.
* gimplify.c (gimplify_asm_expr): Use it.
* tree-pretty-print.c (print_declaration): Dump hard regs.
* tree-outof-ssa.c (check_replaceable): Don't check for hard regs.
* tree-ssa-copyrename.c (copy_rename_partition_coalesce): Likewise.
* tree-ssa-pre.c (is_undefined_value): Likewise.
* tree-ssa-copy.c (may_propagate_copy): Likewise.
(may_propagate_copy_into_asm): Protect DECL_HARD_REGISTER.
* tree-ssa.c (warn_uninit): Likewise.
* tree.h (DECL_HARD_REGISTER): Check for VAR_DECL.
From-SVN: r88321
Diffstat (limited to 'gcc/tree-ssa-copy.c')
| -rw-r--r-- | gcc/tree-ssa-copy.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/gcc/tree-ssa-copy.c b/gcc/tree-ssa-copy.c index 63a3c20..dc41e8e 100644 --- a/gcc/tree-ssa-copy.c +++ b/gcc/tree-ssa-copy.c @@ -145,11 +145,10 @@ may_propagate_copy (tree dest, tree orig) && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (orig)) return false; - /* If DEST is an SSA_NAME that flows from an abnormal edge or if it - represents a hard register, then it cannot be replaced. */ + /* If DEST is an SSA_NAME that flows from an abnormal edge, then it + cannot be replaced. */ if (TREE_CODE (dest) == SSA_NAME - && (SSA_NAME_OCCURS_IN_ABNORMAL_PHI (dest) - || DECL_HARD_REGISTER (SSA_NAME_VAR (dest)))) + && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (dest)) return false; /* Anything else is OK. */ @@ -163,6 +162,7 @@ may_propagate_copy_into_asm (tree dest) { /* Hard register operands of asms are special. Do not bypass. */ return !(TREE_CODE (dest) == SSA_NAME + && TREE_CODE (SSA_NAME_VAR (dest)) == VAR_DECL && DECL_HARD_REGISTER (SSA_NAME_VAR (dest))); } |