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{ "id": 2228164, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2228164/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/20260425153820.4015057-1-andrew.pinski@oss.qualcomm.com/", "project": { "id": 17, "url": "http://patchwork.ozlabs.org/api/1.1/projects/17/?format=api", "name": "GNU Compiler Collection", "link_name": "gcc", "list_id": "gcc-patches.gcc.gnu.org", "list_email": "gcc-patches@gcc.gnu.org", "web_url": null, "scm_url": null, "webscm_url": null }, "msgid": "<20260425153820.4015057-1-andrew.pinski@oss.qualcomm.com>", "date": "2026-04-25T15:38:20", "name": "scev/niter: Use INTEGRAL_NB_TYPE_P instead of direct comparison to INTEGER_TYPE [PR124061]", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "188539fdc141a5ec9fa022a640abcf271da9dbca", "submitter": { "id": 91428, "url": "http://patchwork.ozlabs.org/api/1.1/people/91428/?format=api", "name": "Andrew Pinski", "email": "andrew.pinski@oss.qualcomm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/20260425153820.4015057-1-andrew.pinski@oss.qualcomm.com/mbox/", "series": [ { "id": 501446, "url": "http://patchwork.ozlabs.org/api/1.1/series/501446/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=501446", "date": "2026-04-25T15:38:20", "name": "scev/niter: Use INTEGRAL_NB_TYPE_P instead of direct comparison to INTEGER_TYPE [PR124061]", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/501446/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2228164/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2228164/checks/", "tags": {}, "headers": { "Return-Path": "<gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "gcc-patches@gcc.gnu.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "gcc-patches@gcc.gnu.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256\n header.s=qcppdkim1 header.b=PklbI17n;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com\n header.a=rsa-sha256 header.s=google header.b=GRbjlOIo;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=2620:52:6:3111::32; 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This is not the first time we had\ndirect type comparison against INTEGER_TYPE which should have been different.\nAs mention in PR 124052, I didn't include bool types so I needed a new macro\nto simplify things.\n\nBootstrapped and tested on x86_64-linux-gnu.\n\n\tPR tree-optmiization/124061\ngcc/ChangeLog:\n\n\t* tree-scalar-evolution.cc (interpret_rhs_expr): Use\n\tINTEGRAL_NB_TYPE_P instead of comparing the code to INTEGER_TYPE.\n\t* tree-ssa-loop-niter.cc (number_of_iterations_ne): Likewise.\n\t(number_of_iterations_cltz): Likewise.\n\t(number_of_iterations_exit_assumptions): Likewise.\n\t* tree.h (INTEGRAL_NB_TYPE_P): New macro.\n\ngcc/testsuite/ChangeLog:\n\n\t* g++.dg/opt/enum-loop-1.C: New test.\n\t* gcc.dg/tree-ssa/bitint-loop-opt-1.c: New test.\n\nSigned-off-by: Andrew Pinski <andrew.pinski@oss.qualcomm.com>\n---\n gcc/testsuite/g++.dg/opt/enum-loop-1.C | 15 +++++++++++++++\n gcc/testsuite/gcc.dg/tree-ssa/bitint-loop-opt-1.c | 13 +++++++++++++\n gcc/tree-scalar-evolution.cc | 4 ++--\n gcc/tree-ssa-loop-niter.cc | 8 ++++----\n gcc/tree.h | 7 +++++++\n 5 files changed, 41 insertions(+), 6 deletions(-)\n create mode 100644 gcc/testsuite/g++.dg/opt/enum-loop-1.C\n create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/bitint-loop-opt-1.c", "diff": "diff --git a/gcc/testsuite/g++.dg/opt/enum-loop-1.C b/gcc/testsuite/g++.dg/opt/enum-loop-1.C\nnew file mode 100644\nindex 00000000000..271393eeab5\n--- /dev/null\n+++ b/gcc/testsuite/g++.dg/opt/enum-loop-1.C\n@@ -0,0 +1,15 @@\n+// PR tree-optimization/124061\n+// { dg-do compile { target c++11 } }\n+// { dg-options \"-O2 -fdump-tree-sccp\" }\n+\n+enum a : unsigned {};\n+\n+int f(a limit)\n+{\n+ a i;\n+ for(i = (a)0; i < limit; i = a(i + 1))\n+ ;\n+ return i;\n+}\n+\n+// { dg-final { scan-tree-dump \"final value replacement:\" sccp } }\ndiff --git a/gcc/testsuite/gcc.dg/tree-ssa/bitint-loop-opt-1.c b/gcc/testsuite/gcc.dg/tree-ssa/bitint-loop-opt-1.c\nnew file mode 100644\nindex 00000000000..51db9599086\n--- /dev/null\n+++ b/gcc/testsuite/gcc.dg/tree-ssa/bitint-loop-opt-1.c\n@@ -0,0 +1,13 @@\n+/* PR tree-optimization/124061 */\n+/* { dg-do compile { target bitint } } */\n+/* { dg-options \"-O2 -fdump-tree-sccp\" } */\n+\n+int f(_BitInt(64) limit)\n+{\n+ _BitInt(64) i;\n+ for(i = 0; i < limit; i++)\n+ ;\n+ return i;\n+}\n+\n+/* { dg-final { scan-tree-dump \"final value replacement:\" sccp } } */\ndiff --git a/gcc/tree-scalar-evolution.cc b/gcc/tree-scalar-evolution.cc\nindex e05a171c1b1..f524786f33b 100644\n--- a/gcc/tree-scalar-evolution.cc\n+++ b/gcc/tree-scalar-evolution.cc\n@@ -1897,8 +1897,8 @@ interpret_rhs_expr (class loop *loop, gimple *at_stmt,\n \t the operation done in an unsigned type of the same precision\n \t as the final truncation. We cannot derive a scalar evolution\n \t for the widened operation but for the truncated result. */\n- if (TREE_CODE (type) == INTEGER_TYPE\n-\t && TREE_CODE (TREE_TYPE (rhs1)) == INTEGER_TYPE\n+ if (INTEGRAL_NB_TYPE_P (type)\n+\t && INTEGRAL_NB_TYPE_P (TREE_TYPE (rhs1))\n \t && TYPE_PRECISION (type) < TYPE_PRECISION (TREE_TYPE (rhs1))\n \t && TYPE_OVERFLOW_UNDEFINED (type)\n \t && TREE_CODE (rhs1) == SSA_NAME\ndiff --git a/gcc/tree-ssa-loop-niter.cc b/gcc/tree-ssa-loop-niter.cc\nindex 207bf8ccf60..2b4c4ea3da4 100644\n--- a/gcc/tree-ssa-loop-niter.cc\n+++ b/gcc/tree-ssa-loop-niter.cc\n@@ -1054,7 +1054,7 @@ number_of_iterations_ne (class loop *loop, tree type, affine_iv *iv,\n if (tree_int_cst_sign_bit (iv->step))\n \t{\n \t cond = fold_build2 (GE_EXPR, boolean_type_node, iv->base, final);\n-\t if (TREE_CODE (type) == INTEGER_TYPE)\n+\t if (INTEGRAL_NB_TYPE_P (type))\n \t {\n \t /* Only when base - step doesn't overflow. */\n \t t = TYPE_MAX_VALUE (type);\n@@ -1071,7 +1071,7 @@ number_of_iterations_ne (class loop *loop, tree type, affine_iv *iv,\n else\n \t{\n \t cond = fold_build2 (LE_EXPR, boolean_type_node, iv->base, final);\n-\t if (TREE_CODE (type) == INTEGER_TYPE)\n+\t if (INTEGRAL_NB_TYPE_P (type))\n \t {\n \t /* Only when base - step doesn't underflow. */\n \t t = TYPE_MIN_VALUE (type);\n@@ -2439,7 +2439,7 @@ number_of_iterations_cltz (loop_p loop, edge exit,\n \t iv_2 = gimple_assign_rhs1 (test_value_stmt);\n \t tree rhs_type = TREE_TYPE (iv_2);\n \t if (TREE_CODE (iv_2) != SSA_NAME\n-\t || TREE_CODE (rhs_type) != INTEGER_TYPE\n+\t || !INTEGRAL_NB_TYPE_P (rhs_type)\n \t || (TYPE_PRECISION (rhs_type)\n \t\t != TYPE_PRECISION (test_value_type)))\n \t return false;\n@@ -3275,7 +3275,7 @@ number_of_iterations_exit_assumptions (class loop *loop, edge exit,\n op1 = gimple_cond_rhs (stmt);\n type = TREE_TYPE (op0);\n \n- if (TREE_CODE (type) != INTEGER_TYPE\n+ if (!INTEGRAL_NB_TYPE_P (type)\n && !POINTER_TYPE_P (type))\n return false;\n \ndiff --git a/gcc/tree.h b/gcc/tree.h\nindex f8b2d718b7e..3b012d0fd6a 100644\n--- a/gcc/tree.h\n+++ b/gcc/tree.h\n@@ -617,6 +617,13 @@ extern void omp_clause_range_check_failed (const_tree, const char *, int,\n || TREE_CODE (TYPE) == INTEGER_TYPE \\\n || TREE_CODE (TYPE) == BITINT_TYPE)\n \n+/* Nonzero if TYPE represents an integral type (non-boolean). */\n+\n+#define INTEGRAL_NB_TYPE_P(TYPE) \\\n+ (TREE_CODE (TYPE) == ENUMERAL_TYPE \\\n+ || TREE_CODE (TYPE) == INTEGER_TYPE \\\n+ || TREE_CODE (TYPE) == BITINT_TYPE)\n+\n /* Nonzero if TYPE represents an integral type, including complex\n and vector integer types. */\n \n", "prefixes": [] }