| Message ID | CAAgBjMnh1yYPCGo4s8rmbp60OGfnqcLO42zen0ZWQeC8rkk9Tw@mail.gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | PR92163 | expand |
On Wed, Oct 23, 2019 at 11:45 PM Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org> wrote: > > Hi, > The attached patch tries to fix PR92163 by calling > gimple_purge_dead_eh_edges from ifcvt_local_dce if we need eh cleanup. > Does it look OK ? Hmm. I think it shows an issue with the return value of remove_stmt_form_eh_lp which is true if the LP index is -1 (externally throwing). We don't need to purge any edges in that case. That is, if-conversion should never need to do EH purging since that would be wrong-code. As of the segfault can you please instead either pass down need_eh_cleanup as function parameter (and NULL from ifcvt) or use the return value in DSE to set the bit in the caller. Thanks, Richard. > Thanks, > Prathamesh
On Fri, 25 Oct 2019 at 13:19, Richard Biener <richard.guenther@gmail.com> wrote: > > On Wed, Oct 23, 2019 at 11:45 PM Prathamesh Kulkarni > <prathamesh.kulkarni@linaro.org> wrote: > > > > Hi, > > The attached patch tries to fix PR92163 by calling > > gimple_purge_dead_eh_edges from ifcvt_local_dce if we need eh cleanup. > > Does it look OK ? > > Hmm. I think it shows an issue with the return value of remove_stmt_form_eh_lp > which is true if the LP index is -1 (externally throwing). We don't > need to purge > any edges in that case. That is, if-conversion should never need to > do EH purging > since that would be wrong-code. > > As of the segfault can you please instead either pass down need_eh_cleanup > as function parameter (and NULL from ifcvt) or use the return value in DSE > to set the bit in the caller. Hi Richard, Thanks for the suggestions, does the attached patch look OK ? Bootstrap+test in progress on x86_64-unknown-linux-gnu. Thanks, Prathamesh > > Thanks, > Richard. > > > Thanks, > > Prathamesh 2019-10-25 Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org> PR tree-optimization/92163 * tree-ssa-dse.c (delete_dead_or_redundant_assignment): New param need_eh_cleanup with default value NULL. Gate on need_eh_cleanup before calling bitmap_set_bit. (dse_optimize_redundant_stores): Pass global need_eh_cleanup to delete_dead_or_redundant_assignment. (dse_dom_walker::dse_optimize_stmt): Likewise. * tree-ssa-dse.h (delete_dead_or_redundant_assignment): Adjust prototype. testsuite/ * gcc.dg/tree-ssa/pr92163.c: New test. diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr92163.c b/gcc/testsuite/gcc.dg/tree-ssa/pr92163.c new file mode 100644 index 00000000000..58f548fe76b --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr92163.c @@ -0,0 +1,16 @@ +/* { dg-do "compile" } */ +/* { dg-options "-O2 -fexceptions -fnon-call-exceptions -fopenacc" } */ + +void +xr (int *k7) +{ + int qa; + +#pragma acc parallel +#pragma acc loop vector + for (qa = 0; qa < 3; ++qa) + if (qa % 2 != 0) + k7[qa] = 0; + else + k7[qa] = 1; +} diff --git a/gcc/tree-ssa-dse.c b/gcc/tree-ssa-dse.c index 25cd4709b31..21a15eef690 100644 --- a/gcc/tree-ssa-dse.c +++ b/gcc/tree-ssa-dse.c @@ -77,7 +77,6 @@ along with GCC; see the file COPYING3. If not see fact, they are the same transformation applied to different views of the CFG. */ -void delete_dead_or_redundant_assignment (gimple_stmt_iterator *, const char *); static void delete_dead_or_redundant_call (gimple_stmt_iterator *, const char *); /* Bitmap of blocks that have had EH statements cleaned. We should @@ -639,7 +638,8 @@ dse_optimize_redundant_stores (gimple *stmt) { gimple_stmt_iterator gsi = gsi_for_stmt (use_stmt); if (is_gimple_assign (use_stmt)) - delete_dead_or_redundant_assignment (&gsi, "redundant"); + delete_dead_or_redundant_assignment (&gsi, "redundant", + need_eh_cleanup); else if (is_gimple_call (use_stmt)) delete_dead_or_redundant_call (&gsi, "redundant"); else @@ -900,7 +900,8 @@ delete_dead_or_redundant_call (gimple_stmt_iterator *gsi, const char *type) /* Delete a dead store at GSI, which is a gimple assignment. */ void -delete_dead_or_redundant_assignment (gimple_stmt_iterator *gsi, const char *type) +delete_dead_or_redundant_assignment (gimple_stmt_iterator *gsi, const char *type, + bitmap need_eh_cleanup) { gimple *stmt = gsi_stmt (*gsi); if (dump_file && (dump_flags & TDF_DETAILS)) @@ -915,7 +916,7 @@ delete_dead_or_redundant_assignment (gimple_stmt_iterator *gsi, const char *type /* Remove the dead store. */ basic_block bb = gimple_bb (stmt); - if (gsi_remove (gsi, true)) + if (gsi_remove (gsi, true) && need_eh_cleanup) bitmap_set_bit (need_eh_cleanup, bb->index); /* And release any SSA_NAMEs set in this statement back to the @@ -1059,7 +1060,7 @@ dse_dom_walker::dse_optimize_stmt (gimple_stmt_iterator *gsi) && !by_clobber_p) return; - delete_dead_or_redundant_assignment (gsi, "dead"); + delete_dead_or_redundant_assignment (gsi, "dead", need_eh_cleanup); } } diff --git a/gcc/tree-ssa-dse.h b/gcc/tree-ssa-dse.h index a5eccbd746d..2658f92b1bb 100644 --- a/gcc/tree-ssa-dse.h +++ b/gcc/tree-ssa-dse.h @@ -31,6 +31,7 @@ enum dse_store_status dse_store_status dse_classify_store (ao_ref *, gimple *, bool, sbitmap, bool * = NULL, tree = NULL); -void delete_dead_or_redundant_assignment (gimple_stmt_iterator *, const char *); +void delete_dead_or_redundant_assignment (gimple_stmt_iterator *, const char *, + bitmap = NULL); #endif /* GCC_TREE_SSA_DSE_H */
On Fri, Oct 25, 2019 at 9:58 PM Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org> wrote: > > On Fri, 25 Oct 2019 at 13:19, Richard Biener <richard.guenther@gmail.com> wrote: > > > > On Wed, Oct 23, 2019 at 11:45 PM Prathamesh Kulkarni > > <prathamesh.kulkarni@linaro.org> wrote: > > > > > > Hi, > > > The attached patch tries to fix PR92163 by calling > > > gimple_purge_dead_eh_edges from ifcvt_local_dce if we need eh cleanup. > > > Does it look OK ? > > > > Hmm. I think it shows an issue with the return value of remove_stmt_form_eh_lp > > which is true if the LP index is -1 (externally throwing). We don't > > need to purge > > any edges in that case. That is, if-conversion should never need to > > do EH purging > > since that would be wrong-code. > > > > As of the segfault can you please instead either pass down need_eh_cleanup > > as function parameter (and NULL from ifcvt) or use the return value in DSE > > to set the bit in the caller. > Hi Richard, > Thanks for the suggestions, does the attached patch look OK ? > Bootstrap+test in progress on x86_64-unknown-linux-gnu. OK. Richard. > Thanks, > Prathamesh > > > > Thanks, > > Richard. > > > > > Thanks, > > > Prathamesh
On Mon, 28 Oct 2019 at 07:18, Richard Biener <richard.guenther@gmail.com> wrote: > > On Fri, Oct 25, 2019 at 9:58 PM Prathamesh Kulkarni > <prathamesh.kulkarni@linaro.org> wrote: > > > > On Fri, 25 Oct 2019 at 13:19, Richard Biener <richard.guenther@gmail.com> wrote: > > > > > > On Wed, Oct 23, 2019 at 11:45 PM Prathamesh Kulkarni > > > <prathamesh.kulkarni@linaro.org> wrote: > > > > > > > > Hi, > > > > The attached patch tries to fix PR92163 by calling > > > > gimple_purge_dead_eh_edges from ifcvt_local_dce if we need eh cleanup. > > > > Does it look OK ? > > > > > > Hmm. I think it shows an issue with the return value of remove_stmt_form_eh_lp > > > which is true if the LP index is -1 (externally throwing). We don't > > > need to purge > > > any edges in that case. That is, if-conversion should never need to > > > do EH purging > > > since that would be wrong-code. > > > > > > As of the segfault can you please instead either pass down need_eh_cleanup > > > as function parameter (and NULL from ifcvt) or use the return value in DSE > > > to set the bit in the caller. > > Hi Richard, > > Thanks for the suggestions, does the attached patch look OK ? > > Bootstrap+test in progress on x86_64-unknown-linux-gnu. > > OK. Thanks, committed to trunk in r277525 after bootstrap+test on x86_64-unknown-linux-gnu. Thanks, Prathamesh > > Richard. > > > Thanks, > > Prathamesh > > > > > > Thanks, > > > Richard. > > > > > > > Thanks, > > > > Prathamesh
On Mon, 28 Oct 2019 at 16:03, Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org> wrote: > > On Mon, 28 Oct 2019 at 07:18, Richard Biener <richard.guenther@gmail.com> wrote: > > > > On Fri, Oct 25, 2019 at 9:58 PM Prathamesh Kulkarni > > <prathamesh.kulkarni@linaro.org> wrote: > > > > > > On Fri, 25 Oct 2019 at 13:19, Richard Biener <richard.guenther@gmail.com> wrote: > > > > > > > > On Wed, Oct 23, 2019 at 11:45 PM Prathamesh Kulkarni > > > > <prathamesh.kulkarni@linaro.org> wrote: > > > > > > > > > > Hi, > > > > > The attached patch tries to fix PR92163 by calling > > > > > gimple_purge_dead_eh_edges from ifcvt_local_dce if we need eh cleanup. > > > > > Does it look OK ? > > > > > > > > Hmm. I think it shows an issue with the return value of remove_stmt_form_eh_lp > > > > which is true if the LP index is -1 (externally throwing). We don't > > > > need to purge > > > > any edges in that case. That is, if-conversion should never need to > > > > do EH purging > > > > since that would be wrong-code. > > > > > > > > As of the segfault can you please instead either pass down need_eh_cleanup > > > > as function parameter (and NULL from ifcvt) or use the return value in DSE > > > > to set the bit in the caller. > > > Hi Richard, > > > Thanks for the suggestions, does the attached patch look OK ? > > > Bootstrap+test in progress on x86_64-unknown-linux-gnu. > > > > OK. > Thanks, committed to trunk in r277525 after bootstrap+test on > x86_64-unknown-linux-gnu. > Hi Prathamesh, There's a problem with the new test you added: if uses -fopenacc which is not supported by arm-eabi or aarch64-elf targets for instance. You probably want to move the test to gcc.dg/goacc or add dg-require-effective-target fopenacc. Thanks, Christophe > Thanks, > Prathamesh > > > > Richard. > > > > > Thanks, > > > Prathamesh > > > > > > > > Thanks, > > > > Richard. > > > > > > > > > Thanks, > > > > > Prathamesh
On Mon, 4 Nov 2019 at 18:37, Christophe Lyon <christophe.lyon@linaro.org> wrote: > > On Mon, 28 Oct 2019 at 16:03, Prathamesh Kulkarni > <prathamesh.kulkarni@linaro.org> wrote: > > > > On Mon, 28 Oct 2019 at 07:18, Richard Biener <richard.guenther@gmail.com> wrote: > > > > > > On Fri, Oct 25, 2019 at 9:58 PM Prathamesh Kulkarni > > > <prathamesh.kulkarni@linaro.org> wrote: > > > > > > > > On Fri, 25 Oct 2019 at 13:19, Richard Biener <richard.guenther@gmail.com> wrote: > > > > > > > > > > On Wed, Oct 23, 2019 at 11:45 PM Prathamesh Kulkarni > > > > > <prathamesh.kulkarni@linaro.org> wrote: > > > > > > > > > > > > Hi, > > > > > > The attached patch tries to fix PR92163 by calling > > > > > > gimple_purge_dead_eh_edges from ifcvt_local_dce if we need eh cleanup. > > > > > > Does it look OK ? > > > > > > > > > > Hmm. I think it shows an issue with the return value of remove_stmt_form_eh_lp > > > > > which is true if the LP index is -1 (externally throwing). We don't > > > > > need to purge > > > > > any edges in that case. That is, if-conversion should never need to > > > > > do EH purging > > > > > since that would be wrong-code. > > > > > > > > > > As of the segfault can you please instead either pass down need_eh_cleanup > > > > > as function parameter (and NULL from ifcvt) or use the return value in DSE > > > > > to set the bit in the caller. > > > > Hi Richard, > > > > Thanks for the suggestions, does the attached patch look OK ? > > > > Bootstrap+test in progress on x86_64-unknown-linux-gnu. > > > > > > OK. > > Thanks, committed to trunk in r277525 after bootstrap+test on > > x86_64-unknown-linux-gnu. > > > > Hi Prathamesh, > > There's a problem with the new test you added: if uses -fopenacc which > is not supported by arm-eabi or aarch64-elf targets for instance. > You probably want to move the test to gcc.dg/goacc or add > dg-require-effective-target fopenacc. Oops, sorry about that. Could you please confirm if attached patch fixes the issue ? I added dg-require-effective-target fopenacc. Thanks, Prathamesh > > Thanks, > > Christophe > > > Thanks, > > Prathamesh > > > > > > Richard. > > > > > > > Thanks, > > > > Prathamesh > > > > > > > > > > Thanks, > > > > > Richard. > > > > > > > > > > > Thanks, > > > > > > Prathamesh diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr92163.c b/gcc/testsuite/gcc.dg/tree-ssa/pr92163.c index 58f548fe76b..227c09255e4 100644 --- a/gcc/testsuite/gcc.dg/tree-ssa/pr92163.c +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr92163.c @@ -1,4 +1,5 @@ /* { dg-do "compile" } */ +/* { dg-require-effective-target fopenacc } */ /* { dg-options "-O2 -fexceptions -fnon-call-exceptions -fopenacc" } */ void
On Tue, 5 Nov 2019 at 05:46, Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org> wrote: > > On Mon, 4 Nov 2019 at 18:37, Christophe Lyon <christophe.lyon@linaro.org> wrote: > > > > On Mon, 28 Oct 2019 at 16:03, Prathamesh Kulkarni > > <prathamesh.kulkarni@linaro.org> wrote: > > > > > > On Mon, 28 Oct 2019 at 07:18, Richard Biener <richard.guenther@gmail.com> wrote: > > > > > > > > On Fri, Oct 25, 2019 at 9:58 PM Prathamesh Kulkarni > > > > <prathamesh.kulkarni@linaro.org> wrote: > > > > > > > > > > On Fri, 25 Oct 2019 at 13:19, Richard Biener <richard.guenther@gmail.com> wrote: > > > > > > > > > > > > On Wed, Oct 23, 2019 at 11:45 PM Prathamesh Kulkarni > > > > > > <prathamesh.kulkarni@linaro.org> wrote: > > > > > > > > > > > > > > Hi, > > > > > > > The attached patch tries to fix PR92163 by calling > > > > > > > gimple_purge_dead_eh_edges from ifcvt_local_dce if we need eh cleanup. > > > > > > > Does it look OK ? > > > > > > > > > > > > Hmm. I think it shows an issue with the return value of remove_stmt_form_eh_lp > > > > > > which is true if the LP index is -1 (externally throwing). We don't > > > > > > need to purge > > > > > > any edges in that case. That is, if-conversion should never need to > > > > > > do EH purging > > > > > > since that would be wrong-code. > > > > > > > > > > > > As of the segfault can you please instead either pass down need_eh_cleanup > > > > > > as function parameter (and NULL from ifcvt) or use the return value in DSE > > > > > > to set the bit in the caller. > > > > > Hi Richard, > > > > > Thanks for the suggestions, does the attached patch look OK ? > > > > > Bootstrap+test in progress on x86_64-unknown-linux-gnu. > > > > > > > > OK. > > > Thanks, committed to trunk in r277525 after bootstrap+test on > > > x86_64-unknown-linux-gnu. > > > > > > > Hi Prathamesh, > > > > There's a problem with the new test you added: if uses -fopenacc which > > is not supported by arm-eabi or aarch64-elf targets for instance. > > You probably want to move the test to gcc.dg/goacc or add > > dg-require-effective-target fopenacc. > Oops, sorry about that. Could you please confirm if attached patch > fixes the issue ? > I added dg-require-effective-target fopenacc. > Yes that works. Maybe you can commit it as obvious? Thanks, Christophe > Thanks, > Prathamesh > > > > Thanks, > > > > Christophe > > > > > Thanks, > > > Prathamesh > > > > > > > > Richard. > > > > > > > > > Thanks, > > > > > Prathamesh > > > > > > > > > > > > Thanks, > > > > > > Richard. > > > > > > > > > > > > > Thanks, > > > > > > > Prathamesh
On Tue, 5 Nov 2019 at 18:36, Christophe Lyon <christophe.lyon@linaro.org> wrote: > > On Tue, 5 Nov 2019 at 05:46, Prathamesh Kulkarni > <prathamesh.kulkarni@linaro.org> wrote: > > > > On Mon, 4 Nov 2019 at 18:37, Christophe Lyon <christophe.lyon@linaro.org> wrote: > > > > > > On Mon, 28 Oct 2019 at 16:03, Prathamesh Kulkarni > > > <prathamesh.kulkarni@linaro.org> wrote: > > > > > > > > On Mon, 28 Oct 2019 at 07:18, Richard Biener <richard.guenther@gmail.com> wrote: > > > > > > > > > > On Fri, Oct 25, 2019 at 9:58 PM Prathamesh Kulkarni > > > > > <prathamesh.kulkarni@linaro.org> wrote: > > > > > > > > > > > > On Fri, 25 Oct 2019 at 13:19, Richard Biener <richard.guenther@gmail.com> wrote: > > > > > > > > > > > > > > On Wed, Oct 23, 2019 at 11:45 PM Prathamesh Kulkarni > > > > > > > <prathamesh.kulkarni@linaro.org> wrote: > > > > > > > > > > > > > > > > Hi, > > > > > > > > The attached patch tries to fix PR92163 by calling > > > > > > > > gimple_purge_dead_eh_edges from ifcvt_local_dce if we need eh cleanup. > > > > > > > > Does it look OK ? > > > > > > > > > > > > > > Hmm. I think it shows an issue with the return value of remove_stmt_form_eh_lp > > > > > > > which is true if the LP index is -1 (externally throwing). We don't > > > > > > > need to purge > > > > > > > any edges in that case. That is, if-conversion should never need to > > > > > > > do EH purging > > > > > > > since that would be wrong-code. > > > > > > > > > > > > > > As of the segfault can you please instead either pass down need_eh_cleanup > > > > > > > as function parameter (and NULL from ifcvt) or use the return value in DSE > > > > > > > to set the bit in the caller. > > > > > > Hi Richard, > > > > > > Thanks for the suggestions, does the attached patch look OK ? > > > > > > Bootstrap+test in progress on x86_64-unknown-linux-gnu. > > > > > > > > > > OK. > > > > Thanks, committed to trunk in r277525 after bootstrap+test on > > > > x86_64-unknown-linux-gnu. > > > > > > > > > > Hi Prathamesh, > > > > > > There's a problem with the new test you added: if uses -fopenacc which > > > is not supported by arm-eabi or aarch64-elf targets for instance. > > > You probably want to move the test to gcc.dg/goacc or add > > > dg-require-effective-target fopenacc. > > Oops, sorry about that. Could you please confirm if attached patch > > fixes the issue ? > > I added dg-require-effective-target fopenacc. > > > > Yes that works. Maybe you can commit it as obvious? Thanks, committed in r277906. Thanks, Prathamesh > > Thanks, > > Christophe > > > Thanks, > > Prathamesh > > > > > > Thanks, > > > > > > Christophe > > > > > > > Thanks, > > > > Prathamesh > > > > > > > > > > Richard. > > > > > > > > > > > Thanks, > > > > > > Prathamesh > > > > > > > > > > > > > > Thanks, > > > > > > > Richard. > > > > > > > > > > > > > > > Thanks, > > > > > > > > Prathamesh
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr92163.c b/gcc/testsuite/gcc.dg/tree-ssa/pr92163.c new file mode 100644 index 00000000000..f64eaea6517 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr92163.c @@ -0,0 +1,16 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fexceptions -fnon-call-exceptions -fopenacc" } */ + +void +xr (int *k7) +{ + int qa; + +#pragma acc parallel +#pragma acc loop vector + for (qa = 0; qa < 3; ++qa) + if (qa % 2 != 0) + k7[qa] = 0; + else + k7[qa] = 1; +} diff --git a/gcc/tree-if-conv.c b/gcc/tree-if-conv.c index df9046a3014..3e2769dd02d 100644 --- a/gcc/tree-if-conv.c +++ b/gcc/tree-if-conv.c @@ -2963,6 +2963,7 @@ ifcvt_local_dce (class loop *loop) } } /* Delete dead statements. */ + bool do_eh_cleanup = false; gsi = gsi_start_bb (bb); while (!gsi_end_p (gsi)) { @@ -2975,7 +2976,7 @@ ifcvt_local_dce (class loop *loop) if (dse_classify_store (&write, stmt, false, NULL, NULL, latch_vdef) == DSE_STORE_DEAD) - delete_dead_or_redundant_assignment (&gsi, "dead"); + do_eh_cleanup |= delete_dead_or_redundant_assignment (&gsi, "dead"); else gsi_next (&gsi); continue; @@ -2994,6 +2995,9 @@ ifcvt_local_dce (class loop *loop) gsi_remove (&gsi, true); release_defs (stmt); } + + if (do_eh_cleanup) + gimple_purge_dead_eh_edges (bb); } /* If-convert LOOP when it is legal. For the moment this pass has no diff --git a/gcc/tree-ssa-dse.c b/gcc/tree-ssa-dse.c index 25cd4709b31..deec6c07c50 100644 --- a/gcc/tree-ssa-dse.c +++ b/gcc/tree-ssa-dse.c @@ -77,7 +77,6 @@ along with GCC; see the file COPYING3. If not see fact, they are the same transformation applied to different views of the CFG. */ -void delete_dead_or_redundant_assignment (gimple_stmt_iterator *, const char *); static void delete_dead_or_redundant_call (gimple_stmt_iterator *, const char *); /* Bitmap of blocks that have had EH statements cleaned. We should @@ -899,7 +898,7 @@ delete_dead_or_redundant_call (gimple_stmt_iterator *gsi, const char *type) /* Delete a dead store at GSI, which is a gimple assignment. */ -void +bool delete_dead_or_redundant_assignment (gimple_stmt_iterator *gsi, const char *type) { gimple *stmt = gsi_stmt (*gsi); @@ -915,12 +914,14 @@ delete_dead_or_redundant_assignment (gimple_stmt_iterator *gsi, const char *type /* Remove the dead store. */ basic_block bb = gimple_bb (stmt); - if (gsi_remove (gsi, true)) + bool eh_cleanup_required = gsi_remove (gsi, true); + if (eh_cleanup_required && need_eh_cleanup) bitmap_set_bit (need_eh_cleanup, bb->index); /* And release any SSA_NAMEs set in this statement back to the SSA_NAME manager. */ release_defs (stmt); + return eh_cleanup_required; } /* Attempt to eliminate dead stores in the statement referenced by BSI. diff --git a/gcc/tree-ssa-dse.h b/gcc/tree-ssa-dse.h index a5eccbd746d..80b6d9b2616 100644 --- a/gcc/tree-ssa-dse.h +++ b/gcc/tree-ssa-dse.h @@ -31,6 +31,6 @@ enum dse_store_status dse_store_status dse_classify_store (ao_ref *, gimple *, bool, sbitmap, bool * = NULL, tree = NULL); -void delete_dead_or_redundant_assignment (gimple_stmt_iterator *, const char *); +bool delete_dead_or_redundant_assignment (gimple_stmt_iterator *, const char *); #endif /* GCC_TREE_SSA_DSE_H */