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re PR tree-optimization/44632 (wrong code for complex division)

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2010-08-09  Richard Guenther  <rguenther@suse.de>

	PR middle-end/44632
	* function.c (gimplify_parameters): Do not clear addressable
	bit of the original parameter.

	* g++.dg/opt/nrv17.C: New testcase.

From-SVN: r163031
This commit is contained in:
Richard Guenther 2010-08-09 13:18:08 +00:00 committed by Richard Biener
parent 87d072e09a
commit 37609bf086
4 changed files with 46 additions and 5 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2010-08-09 Richard Guenther <rguenther@suse.de>
PR middle-end/44632
* function.c (gimplify_parameters): Do not clear addressable
bit of the original parameter.
2010-08-09 Richard Guenther <rguenther@suse.de>
PR middle-end/45212

8
gcc/function.c
View File

@ -3570,12 +3570,10 @@ gimplify_parameters (void)
DECL_IGNORED_P (local) = 0;
/* If PARM was addressable, move that flag over
to the local copy, as its address will be taken,
not the PARMs. */
not the PARMs. Keep the parms address taken
as we'll query that flag during gimplification. */
if (TREE_ADDRESSABLE (parm))
{
TREE_ADDRESSABLE (parm) = 0;
TREE_ADDRESSABLE (local) = 1;
}
TREE_ADDRESSABLE (local) = 1;
}
else
{

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2010-08-09 Richard Guenther <rguenther@suse.de>
PR middle-end/44632
* g++.dg/opt/nrv17.C: New testcase.
2010-08-09 Richard Guenther <rguenther@suse.de>
PR middle-end/45212

32
gcc/testsuite/g++.dg/opt/nrv17.C Normal file
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@ -0,0 +1,32 @@
// { dg-do run }
#include <cstdlib>
#include <complex>
void __attribute__((noinline))
h(std::complex<double> x)
{
if (x.real() != 2.0)
std::abort ();
}
void __attribute__((noinline))
g(std::complex<double> x)
{
if (x.real() != 0.5)
std::abort ();
}
void __attribute__((noinline))
f(std::complex<double> x)
{
h (x);
x = 1.0 / x;
g (x);
}
int main()
{
f(2.0);
return 0;
}