re PR tree-optimization/29877 (out of SSA (TER) extends variable life of variable beyond original declared)
PR tree-optimization/29877 gcc/ * tree-ssa-ter.c (is_replaceable_p): Deem assignments with a register variable on the RHS to not be replaceable. gcc/testsuite/ * gcc.dg/pr16194.c: Skip test entirely if we don't know the name of a hard register for the target concerned. Adjust dg-error directives to cope with new behaviour of TER. From-SVN: r120571
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@ -1,3 +1,9 @@
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2007-01-08 Mark Shinwell <shinwell@codesourcery.com>
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PR tree-optimization/29877
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* tree-ssa-ter.c (is_replaceable_p): Deem assignments with
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a register variable on the RHS to not be replaceable.
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2007-01-08 Chen Liqin <liqin@sunnorth.com.cn>
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2007-01-08 Chen Liqin <liqin@sunnorth.com.cn>
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* config/score/t-score-elf (MULTILIB_OPTIONS): Change.
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* config/score/t-score-elf (MULTILIB_OPTIONS): Change.
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* config/score/predicates.md (const_uimm5, sr0_operand, const_simm12,
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* config/score/predicates.md (const_uimm5, sr0_operand, const_simm12,
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@ -1,3 +1,10 @@
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2007-01-08 Mark Shinwell <shinwell@codesourcery.com>
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PR tree-optimization/29877
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* gcc.dg/pr16194.c: Skip test entirely if we don't know the
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name of a hard register for the target concerned. Adjust dg-error
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directives to cope with new behaviour of TER.
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2007-01-07 Manuel Lopez-Ibanez <manu@gcc.gnu.org>
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2007-01-07 Manuel Lopez-Ibanez <manu@gcc.gnu.org>
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PR c++/28986
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PR c++/28986
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@ -2,6 +2,7 @@
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/* { dg-options "-O" } */
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/* { dg-options "-O" } */
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/* { dg-bogus "internal compiler error" "ICE" { target *-*-* } 0 } */
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/* { dg-bogus "internal compiler error" "ICE" { target *-*-* } 0 } */
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#undef SKIP
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#define ASMDECL __asm (REG);
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#define ASMDECL __asm (REG);
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#define CLOBBER_LIST : REG
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#define CLOBBER_LIST : REG
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#define INP_CLOBBER_LIST : CLOBBER_LIST
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#define INP_CLOBBER_LIST : CLOBBER_LIST
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@ -18,17 +19,15 @@
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# define REG "6"
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# define REG "6"
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#elif defined (__x86_64__)
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#elif defined (__x86_64__)
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# define REG "rax"
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# define REG "rax"
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#elif defined (__m68k__)
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# define REG "%d0"
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#else
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#else
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/* Make this test harmless for any target not recognized above. */
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/* Make this test harmless for any target not recognized above. */
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# undef ASMDECL
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# define SKIP 1
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# define ASMDECL
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# define REG "conflict"
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# undef CLOBBER_LIST
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# define CLOBBER_LIST
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# undef INP_CLOBBER_LIST
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# define INP_CLOBBER_LIST
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#endif
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#endif
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#ifndef SKIP
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struct A
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struct A
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{
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{
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int a;
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int a;
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@ -47,7 +46,7 @@ struct C
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void bug (void)
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void bug (void)
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{
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{
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register char* dst ASMDECL;
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register char* dst ASMDECL;
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__asm__ ("":"=g"(*dst): : REG); /* { dg-error "conflict" } */
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__asm__ ("":"=g"(*dst): : REG);
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}
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}
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/* The tree optimizers currently prevent us from finding an overlap -
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/* The tree optimizers currently prevent us from finding an overlap -
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@ -56,12 +55,22 @@ void bug (void)
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void bug2 (void)
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void bug2 (void)
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{
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{
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register char* dst ASMDECL;
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register char* dst ASMDECL;
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__asm__ ("": :"g"(*dst) CLOBBER_LIST); /* { dg-error "conflict" } */
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__asm__ ("": :"g"(*dst) CLOBBER_LIST);
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}
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}
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void
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void
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foo (void)
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foo (void)
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{
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{
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register struct C *dst ASMDECL;
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register struct C *dst ASMDECL;
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__asm__ ("" : "=g"(dst->c.b[1].a) INP_CLOBBER_LIST); /* { dg-error "conflict" } */
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__asm__ ("" : "=g"(dst->c.b[1].a) INP_CLOBBER_LIST);
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}
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}
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#else
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int main ()
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{
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return 0;
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}
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#endif
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@ -393,6 +393,12 @@ is_replaceable_p (tree stmt)
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&& FLOAT_TYPE_P (TREE_TYPE (GENERIC_TREE_OPERAND (stmt, 1))))
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&& FLOAT_TYPE_P (TREE_TYPE (GENERIC_TREE_OPERAND (stmt, 1))))
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return false;
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return false;
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/* An assignment with a register variable on the RHS is not
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replaceable. */
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if (TREE_CODE (GENERIC_TREE_OPERAND (stmt, 1)) == VAR_DECL
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&& DECL_HARD_REGISTER (GENERIC_TREE_OPERAND (stmt, 1)))
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return false;
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/* Calls to functions with side-effects cannot be replaced. */
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/* Calls to functions with side-effects cannot be replaced. */
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if ((call_expr = get_call_expr_in (stmt)) != NULL_TREE)
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if ((call_expr = get_call_expr_in (stmt)) != NULL_TREE)
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{
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{
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