From: Jakub Jelinek <jakub@redhat.com>
Date: Fri, 20 Dec 2019 17:44:16 +0000 (+0100)
Subject: backport: re PR tree-optimization/92930 (GCC incorrectly optimizes away __builtin_app... 
X-Git-Tag: releases/gcc-9.3.0~280
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6a6bf672cde4340d6acfec5b1c8b797d43219922;p=thirdparty%2Fgcc.git

backport: re PR tree-optimization/92930 (GCC incorrectly optimizes away __builtin_apply() calls)

	Backported from mainline
	2019-12-14  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/92930
	* ipa-pure-const.c (special_builtin_state): Don't handle
	BUILT_IN_APPLY.

	* gcc.dg/tree-ssa/pr92930.c: New test.

From-SVN: r279674
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b611ddded12e..744169615cc2 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -5,6 +5,12 @@
 	diagnose teams not closely nested inside of target.
 
 	Backported from mainline
+	2019-12-14  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/92930
+	* ipa-pure-const.c (special_builtin_state): Don't handle
+	BUILT_IN_APPLY.
+
 	2019-12-12  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/92904
diff --git a/gcc/ipa-pure-const.c b/gcc/ipa-pure-const.c
index bb561d00853f..0c6f84ff72de 100644
--- a/gcc/ipa-pure-const.c
+++ b/gcc/ipa-pure-const.c
@@ -527,7 +527,6 @@ special_builtin_state (enum pure_const_state_e *state, bool *looping,
 	case BUILT_IN_CXA_END_CLEANUP:
 	case BUILT_IN_EH_COPY_VALUES:
 	case BUILT_IN_FRAME_ADDRESS:
-	case BUILT_IN_APPLY:
 	case BUILT_IN_APPLY_ARGS:
 	case BUILT_IN_ASAN_BEFORE_DYNAMIC_INIT:
 	case BUILT_IN_ASAN_AFTER_DYNAMIC_INIT:
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 90f65318a9e6..cfff70b986ae 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,6 +1,11 @@
 2019-12-20  Jakub Jelinek  <jakub@redhat.com>
 
 	Backported from mainline
+	2019-12-14  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/92930
+	* gcc.dg/tree-ssa/pr92930.c: New test.
+
 	2019-12-12  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/92904
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr92930.c b/gcc/testsuite/gcc.dg/tree-ssa/pr92930.c
new file mode 100644
index 000000000000..67e604b6c506
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr92930.c
@@ -0,0 +1,19 @@
+/* PR tree-optimization/92930 */
+/* { dg-do compile { target untyped_assembly } } */
+/* { dg-options "-O2 -fdump-tree-optimized" } */
+/* { dg-final { scan-tree-dump "__builtin_apply " "optimized" } } */
+/* { dg-final { scan-tree-dump "__builtin_apply_args" "optimized" } } */
+
+void foo (int a, int b, int c, int d, int e, int f, int g);
+
+static void bar (int a, ...)
+{
+  __builtin_apply (foo, __builtin_apply_args (), 20);
+}
+
+int
+main ()
+{
+  bar (1024, 1025, 1026, 1027, 1028, 1029, 1030);
+  return 0;
+}