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re PR middle-end/32602 (Sibcall optimization fails to detect overlap)

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2007-07-06  Josh Conner  <jconner@apple.com>

	PR middle-end/32602
	PR middle-end/32603
	* calls.c (store_one_arg): Handle arguments which are partially
	on the stack when detecting argument overlap.

2007-07-06  Josh Conner  <jconner@apple.com>

	PR middle-end/32602
	* gcc.dg/sibcall-8.c: New test.

2007-07-06  Josh Conner  <jconner@apple.com>

	PR middle-end/32603
	* gcc.target/arm/sibcall-1.c: New test.

From-SVN: r126422
This commit is contained in:
Josh Conner 2007-07-06 16:57:19 +00:00 committed by Josh Conner
parent bb9d1da7db
commit d6c2c77c91
5 changed files with 97 additions and 1 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2007-07-06 Josh Conner <jconner@apple.com>
PR middle-end/32602
PR middle-end/32603
* calls.c (store_one_arg): Handle arguments which are partially
on the stack when detecting argument overlap.
2007-07-06 Bernd Schmidt <bernd.schmidt@analog.com>
* reload1.c (choose_reload_regs): Set reload_spill_index for regs

17
gcc/calls.c
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@ -4326,6 +4326,7 @@ store_one_arg (struct arg_data *arg, rtx argblock, int flags,
/* expand_call should ensure this. */
gcc_assert (!arg->locate.offset.var
&& arg->locate.size.var == 0
&& GET_CODE (size_rtx) == CONST_INT);
if (arg->locate.offset.constant > i)
@ -4335,7 +4336,21 @@ store_one_arg (struct arg_data *arg, rtx argblock, int flags,
}
else if (arg->locate.offset.constant < i)
{
if (i < arg->locate.offset.constant + INTVAL (size_rtx))
/* Use arg->locate.size.constant instead of size_rtx
because we only care about the part of the argument
on the stack. */
if (i < (arg->locate.offset.constant
+ arg->locate.size.constant))
sibcall_failure = 1;
}
else
{
/* Even though they appear to be at the same location,
if part of the outgoing argument is in registers,
they aren't really at the same location. Check for
this by making sure that the incoming size is the
same as the outgoing size. */
if (arg->locate.size.constant != INTVAL (size_rtx))
sibcall_failure = 1;
}
}

10
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,13 @@
2007-07-06 Josh Conner <jconner@apple.com>
PR middle-end/32602
* gcc.dg/sibcall-8.c: New test.
2007-07-06 Josh Conner <jconner@apple.com>
PR middle-end/32603
* gcc.target/arm/sibcall-1.c: New test.
2007-07-06 H.J. Lu <hongjiu.lu@intel.com>
* gcc.dg/dfp/convert-dfp-round-thread.c: New test.

30
gcc/testsuite/gcc.dg/sibcall-8.c Normal file
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@ -0,0 +1,30 @@
/* { dg-do run } */
/* { dg-options "-O2 -foptimize-sibling-calls" } */
typedef struct {
int data[4];
} arr16_t;
int result = 0;
void func2(int i, int j, arr16_t arr)
{
result = (arr.data[0] != 1
|| arr.data[1] != 2
|| arr.data[2] != 3
|| arr.data[3] != 4);
}
void func1(int i, int j, int k, arr16_t a)
{
func2(i, j, a);
}
int main(int argc, const char *argv[])
{
arr16_t arr = {{1, 2, 3, 4}};
func1(0, 0, 0, arr);
return result;
}

34
gcc/testsuite/gcc.target/arm/sibcall-1.c Normal file
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@ -0,0 +1,34 @@
/* { dg-do compile { target { arm32 } } } */
/* { dg-options "-O2" } */
#define noinline __attribute__((noinline))
typedef struct {
int data[4];
} arr16_t;
int result = 0;
void noinline func2 (int i, int j, arr16_t arr)
{
result = (arr.data[0] != 1
|| arr.data[1] != 2
|| arr.data[2] != 3
|| arr.data[3] != 4);
}
void func1 (int i, int j, int k, int l, int m, int n, arr16_t a)
{
func2(i, j, a);
}
int main(int argc, const char *argv[])
{
arr16_t arr = {{1, 2, 3, 4}};
func1(0, 0, 0, 0, 0, 0, arr);
return result;
}
/* { dg-final { scan-assembler "\tb\tfunc2\n" } } */