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Re: [PATCH] Fix IPA ICF with ASM statements (PR inline-asm/82001).
On 08/30/2017 11:18 AM, Richard Biener wrote:
> On Wed, Aug 30, 2017 at 11:12 AM, Martin Liška <mliska@suse.cz> wrote:
>> Hi.
>>
>> Following patch compares also constraints of input and output operands of ASM statements.
>> Patch can bootstrap on ppc64le-redhat-linux and survives regression tests.
>>
>> Ready to be installed?
>
> It's now no longer "compare_tree_list_operand" but compare_asm_constraint
> where there's no need to walk TREE_CHAIN either.
Yep, it desires a refactoring.
Is it fine for trunk?
Martin
>
> So can you refactor this a bit?
>
>> Martin
>>
>> gcc/ChangeLog:
>>
>> 2017-08-28 Martin Liska <mliska@suse.cz>
>>
>> PR inline-asm/82001
>> * ipa-icf-gimple.c (func_checker::compare_tree_list_operand):
>> Compare TREE_PURPOSE of asm inputs and outputs.
>>
>> gcc/testsuite/ChangeLog:
>>
>> 2017-08-28 Martin Liska <mliska@suse.cz>
>>
>> PR inline-asm/82001
>> * gcc.dg/ipa/pr82001.c: New test.
>> ---
>> gcc/ipa-icf-gimple.c | 10 ++++++++++
>> gcc/testsuite/gcc.dg/ipa/pr82001.c | 21 +++++++++++++++++++++
>> 2 files changed, 31 insertions(+)
>> create mode 100644 gcc/testsuite/gcc.dg/ipa/pr82001.c
>>
>>
>From dbbbf807a5721cb14da95fddbfe9afc32cd60ce7 Mon Sep 17 00:00:00 2001
From: marxin <mliska@suse.cz>
Date: Mon, 28 Aug 2017 13:57:07 +0200
Subject: [PATCH] Fix IPA ICF with ASM statements (PR inline-asm/82001).
gcc/ChangeLog:
2017-08-28 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.
gcc/testsuite/ChangeLog:
2017-08-28 Martin Liska <mliska@suse.cz>
PR inline-asm/82001
* gcc.dg/ipa/pr82001.c: New test.
---
gcc/ipa-icf-gimple.c | 19 +++++++++++++------
gcc/ipa-icf-gimple.h | 6 +++---
gcc/testsuite/gcc.dg/ipa/pr82001.c | 21 +++++++++++++++++++++
3 files changed, 37 insertions(+), 9 deletions(-)
create mode 100644 gcc/testsuite/gcc.dg/ipa/pr82001.c
diff --git a/gcc/ipa-icf-gimple.c b/gcc/ipa-icf-gimple.c
index f44a995f580..b40dd8653b4 100644
--- a/gcc/ipa-icf-gimple.c
+++ b/gcc/ipa-icf-gimple.c
@@ -543,11 +543,8 @@ 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);
@@ -560,6 +557,16 @@ 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);
}
@@ -1008,7 +1015,7 @@ 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");
}
@@ -1017,7 +1024,7 @@ 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 da904b5897e..7e69024165f 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/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" } } */
--
2.14.1