Backport r251530

2017-09-15  Martin Liska  <mliska@suse.cz>

	Backport from mainline
	2017-08-30  Martin Liska  <mliska@suse.cz>

	PR inline-asm/82001
	* ipa-icf-gimple.c (func_checker::compare_tree_list_operand):
	Rename to ...
	(func_checker::compare_asm_inputs_outputs): ... this function.
	(func_checker::compare_gimple_asm): Use the function to compare
	also ASM constrains.
	* ipa-icf-gimple.h: Rename the function.
2017-09-15  Martin Liska  <mliska@suse.cz>

	Backport from mainline
	2017-08-30  Martin Liska  <mliska@suse.cz>

	PR inline-asm/82001
	* gcc.dg/ipa/pr82001.c: New test.


git-svn-id: https://gcc.gnu.org/svn/gcc/branches/gcc-5-branch@252812 138bc75d-0d04-0410-961f-82ee72b054a4

5 files changed, 58 insertions, 9 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c028b6147fc..38cbf7dff75 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,6 +1,19 @@
 2017-09-15  Martin Liska  <mliska@suse.cz>
 
 	Backport from mainline
+	2017-08-30  Martin Liska  <mliska@suse.cz>
+
+	PR inline-asm/82001
+	* ipa-icf-gimple.c (func_checker::compare_tree_list_operand):
+	Rename to ...
+	(func_checker::compare_asm_inputs_outputs): ... this function.
+	(func_checker::compare_gimple_asm): Use the function to compare
+	also ASM constrains.
+	* ipa-icf-gimple.h: Rename the function.
+
+2017-09-15  Martin Liska  <mliska@suse.cz>
+
+	Backport from mainline
 	2017-08-10  Martin Liska  <mliska@suse.cz>
 
 	PR c++/81355
diff --git a/gcc/ipa-icf-gimple.c b/gcc/ipa-icf-gimple.c
index 6227b7e9579..a97f282a7a2 100644
--- a/gcc/ipa-icf-gimple.c
+++ b/gcc/ipa-icf-gimple.c
@@ -577,11 +577,8 @@ func_checker::compare_operand (tree t1, tree t2)
     }
 }
 
-/* Compares two tree list operands T1 and T2 and returns true if these
-   two trees are semantically equivalent.  */
-
 bool
-func_checker::compare_tree_list_operand (tree t1, tree t2)
+func_checker::compare_asm_inputs_outputs (tree t1, tree t2)
 {
   gcc_assert (TREE_CODE (t1) == TREE_LIST);
   gcc_assert (TREE_CODE (t2) == TREE_LIST);
@@ -594,6 +591,16 @@ func_checker::compare_tree_list_operand (tree t1, tree t2)
       if (!compare_operand (TREE_VALUE (t1), TREE_VALUE (t2)))
 	return return_false ();
 
+      tree p1 = TREE_PURPOSE (t1);
+      tree p2 = TREE_PURPOSE (t2);
+
+      gcc_assert (TREE_CODE (p1) == TREE_LIST);
+      gcc_assert (TREE_CODE (p2) == TREE_LIST);
+
+      if (strcmp (TREE_STRING_POINTER (TREE_VALUE (p1)),
+		  TREE_STRING_POINTER (TREE_VALUE (p2))) != 0)
+	return return_false ();
+
       t2 = TREE_CHAIN (t2);
     }
 
@@ -1039,7 +1046,7 @@ func_checker::compare_gimple_asm (const gasm *g1, const gasm *g2)
       tree input1 = gimple_asm_input_op (g1, i);
       tree input2 = gimple_asm_input_op (g2, i);
 
-      if (!compare_tree_list_operand (input1, input2))
+      if (!compare_asm_inputs_outputs (input1, input2))
 	return return_false_with_msg ("ASM input is different");
     }
 
@@ -1048,7 +1055,7 @@ func_checker::compare_gimple_asm (const gasm *g1, const gasm *g2)
       tree output1 = gimple_asm_output_op (g1, i);
       tree output2 = gimple_asm_output_op (g2, i);
 
-      if (!compare_tree_list_operand (output1, output2))
+      if (!compare_asm_inputs_outputs (output1, output2))
 	return return_false_with_msg ("ASM output is different");
     }
 
diff --git a/gcc/ipa-icf-gimple.h b/gcc/ipa-icf-gimple.h
index 6a9cbed5ff4..4d2ec9169b7 100644
--- a/gcc/ipa-icf-gimple.h
+++ b/gcc/ipa-icf-gimple.h
@@ -215,9 +215,9 @@ public:
      is returned.  */
   bool compare_operand (tree t1, tree t2);
 
-  /* Compares two tree list operands T1 and T2 and returns true if these
-     two trees are semantically equivalent.  */
-  bool compare_tree_list_operand (tree t1, tree t2);
+  /* Compares GIMPLE ASM inputs (or outputs) where we iterate tree chain
+     and compare both TREE_PURPOSEs and TREE_VALUEs.  */
+  bool compare_asm_inputs_outputs (tree t1, tree t2);
 
   /* Verifies that trees T1 and T2, representing function declarations
      are equivalent from perspective of ICF.  */
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index dd465052bc7..576064b4f2c 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,6 +1,14 @@
 2017-09-15  Martin Liska  <mliska@suse.cz>
 
 	Backport from mainline
+	2017-08-30  Martin Liska  <mliska@suse.cz>
+
+	PR inline-asm/82001
+	* gcc.dg/ipa/pr82001.c: New test.
+
+2017-09-15  Martin Liska  <mliska@suse.cz>
+
+	Backport from mainline
 	2017-08-10  Martin Liska  <mliska@suse.cz>
 
 	PR c++/81355
diff --git a/gcc/testsuite/gcc.dg/ipa/pr82001.c b/gcc/testsuite/gcc.dg/ipa/pr82001.c
new file mode 100644
index 00000000000..05e32b10ef5
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/ipa/pr82001.c
@@ -0,0 +1,21 @@
+/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
+/* { dg-options "-O2 -fdump-ipa-icf-details"  } */
+
+int
+mullo (int a, int b)
+{
+  asm("mul %%edx   # %%1 was %1"
+      : "+"
+	"a"(a),
+	"+d"(b));
+  return a;
+}
+
+int
+mulhi (int a, int b)
+{
+  asm("mul %%edx   # %%1 was %1" : "+d"(a), "+a"(b));
+  return a;
+}
+
+/* { dg-final { scan-ipa-dump "Equal symbols: 0" "icf"  } } */