rs6000: Don't push stack frame for AIX when debugging and -fcompare-debug.

AIX pushes a stack frame when debugging is enabled.  With -fcompare-debug
this generates comparison failures because code geneation is different.
This patch disables the stack push for -fcompare-debug that only is used
for internal testing and not for normal debug information generation that
will be consumed by AIX tools.

This patch also removes xfails from testsuite testcases that use
-fcompare-debug and no longer fail on AIX without the stack push difference.

        * config/rs6000/rs6000-logue.c (rs6000_stack_info): Don't push a
        stack frame when debugging and flag_compare_debug is enabled.

testsuite/
        * g++.dg/debug/dwarf2/pr61433.C: Unfail AIX.
        * g++.dg/opt/pr48549.C: Same.
        * g++.dg/opt/pr60002.C: Same.
        * g++.dg/opt/pr80436.C: Same.
        * g++.dg/opt/pr83084.C: Same.
        * g++.dg/other/pr42685.C: Same.
        * gcc.dg/pr41241.c: Same.
        * gcc.dg/pr42629.c: Same.
        * gcc.dg/pr42630.c: Same.
        * gcc.dg/pr42719.c: Same.
        * gcc.dg/pr42728.c: Same.
        * gcc.dg/pr42889.c: Same.
        * gcc.dg/pr42916.c: Same.
        * gcc.dg/pr43084.c: Same.
        * gcc.dg/pr43670.c: Same.
        * gcc.dg/pr44023.c: Same.
        * gcc.dg/pr44971.c: Same.
        * gcc.dg/pr45449.c: Same.
        * gcc.dg/pr46771.c: Same.
        * gcc.dg/pr47684.c: Same.
        * gcc.dg/pr47881.c: Same.
        * gcc.dg/pr48768.c: Same.
        * gcc.dg/pr50017.c: Same.
        * gcc.dg/pr56023.c: Same.
        * gcc.dg/pr64935-1.c: Same.
        * gcc.dg/pr64935-2.c: Same.
        * gcc.dg/pr65521.c: Same.
        * gcc.dg/pr65779.c: Same.
        * gcc.dg/pr65980.c: Same.
        * gcc.dg/pr66688.c: Same.
        * gcc.dg/pr70405.c: Same.
        * gcc.dg/vect/pr49352.c: Same.

gcc/ChangeLog

+2020-04-25  David Edelsohn  <dje.gcc@gmail.com>
+
+	* config/rs6000/rs6000-logue.c (rs6000_stack_info): Don't push a
+	stack frame when debugging and flag_compare_debug is enabled.
+
 2020-04-25  Michael Meissner  <meissner@linux.ibm.com>
 
 	* config/rs6000/linux64.h (PCREL_SUPPORTED_BY_OS): Define to

gcc/config/rs6000/rs6000-logue.c

@@ -909,7 +909,7 @@ rs6000_stack_info (void)
   else if (frame_pointer_needed)
     info->push_p = 1;
 
-  else if (TARGET_XCOFF && write_symbols != NO_DEBUG)
+  else if (TARGET_XCOFF && write_symbols != NO_DEBUG && !flag_compare_debug)
     info->push_p = 1;
 
   else

gcc/testsuite/ChangeLog

 2020-04-25  David Edelsohn  <dje.gcc@gmail.com>
 
+	* g++.dg/debug/dwarf2/pr61433.C: Unfail AIX.
+	* g++.dg/opt/pr48549.C: Same.
+	* g++.dg/opt/pr60002.C: Same.
+	* g++.dg/opt/pr80436.C: Same.
+	* g++.dg/opt/pr83084.C: Same.
+	* g++.dg/other/pr42685.C: Same.
+	* gcc.dg/pr41241.c: Same.
+	* gcc.dg/pr42629.c: Same.
+	* gcc.dg/pr42630.c: Same.
+	* gcc.dg/pr42719.c: Same.
+	* gcc.dg/pr42728.c: Same.
+	* gcc.dg/pr42889.c: Same.
+	* gcc.dg/pr42916.c: Same.
+	* gcc.dg/pr43084.c: Same.
+	* gcc.dg/pr43670.c: Same.
+	* gcc.dg/pr44023.c: Same.
+	* gcc.dg/pr44971.c: Same.
+	* gcc.dg/pr45449.c: Same.
+	* gcc.dg/pr46771.c: Same.
+	* gcc.dg/pr47684.c: Same.
+	* gcc.dg/pr47881.c: Same.
+	* gcc.dg/pr48768.c: Same.
+	* gcc.dg/pr50017.c: Same.
+	* gcc.dg/pr56023.c: Same.
+	* gcc.dg/pr64935-1.c: Same.
+	* gcc.dg/pr64935-2.c: Same.
+	* gcc.dg/pr65521.c: Same.
+	* gcc.dg/pr65779.c: Same.
+	* gcc.dg/pr65980.c: Same.
+	* gcc.dg/pr66688.c: Same.
+	* gcc.dg/pr70405.c: Same.
+	* gcc.dg/vect/pr49352.c: Same.
+
+2020-04-25  David Edelsohn  <dje.gcc@gmail.com>
+
 	* gcc.dg/ipa/ipa-sra-19.c: Add -Wno-psabi option on AIX.
 
 2020-04-25  David Edelsohn  <dje.gcc@gmail.com>

gcc/testsuite/g++.dg/debug/dwarf2/pr61433.C

 // PR c++/61433
 // { dg-do compile { target c++11 } }
-// { dg-xfail-if "" { powerpc-ibm-aix* } }
 // { dg-options "-O -fcompare-debug -fno-inline -fno-ipa-pure-const -fipa-sra" }
 // { dg-additional-options "-Wno-return-type" }
 

gcc/testsuite/g++.dg/debug/pr46583.C

 // PR debug/46583
 // { dg-do compile }
 // { dg-options "-O -fno-inline -fipa-cp -fipa-cp-clone -fcompare-debug" }
-// { dg-xfail-if "" { powerpc-ibm-aix* } }
+// { dg-xfail-if "AIX compare debug" { powerpc-ibm-aix* } }
 
 template < typename = unsigned long >struct A
 {

gcc/testsuite/g++.dg/debug/pr47106.C

 // { dg-do compile }
 // { dg-options "-O -fpartial-inlining -flto -fconserve-stack -fcompare-debug" }
 // { dg-require-effective-target lto }
-// { dg-xfail-if "" { powerpc-ibm-aix* } }
+// { dg-xfail-if "AIX compare debug" { powerpc-ibm-aix* } }
 
 void end (int, int) __attribute__ ((__noreturn__));
 

gcc/testsuite/g++.dg/debug/pr56294.C

 // { dg-do compile }
 // { dg-options "-fno-ipa-sra -fcompare-debug" }
-// { dg-xfail-if "" { powerpc-ibm-aix* } }
+// { dg-xfail-if "AIX compare debug" { powerpc-ibm-aix* } }
 
 struct comp_cost { int cost; unsigned complexity; };
 struct cost_pair { struct iv_cand *cand; };

gcc/testsuite/g++.dg/debug/pr56819.C

 // PR debug/56819
 // { dg-do compile }
 // { dg-options "-fcompare-debug" }
-// { dg-xfail-if "" { powerpc-ibm-aix* } }
+// { dg-xfail-if "AIX compare debug" { powerpc-ibm-aix* } }
 
 template <typename>
 struct A

gcc/testsuite/g++.dg/debug/pr71432.C

 /* { dg-do compile } */
 /* { dg-options "-O2 -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
+/* { dg-xfail-if "AIX compare debug" { powerpc-ibm-aix* } } */
 
 namespace std
 {

gcc/testsuite/g++.dg/debug/pr84704.C

 // PR c++/84704
 // { dg-do compile }
 // { dg-options "-g -fcompare-debug -O2" }
-// { dg-xfail-if "" { powerpc-ibm-aix* } }
+// { dg-xfail-if "AIX compare debug" { powerpc-ibm-aix* } }
 
 int a[1] = { 0 };
 

gcc/testsuite/g++.dg/opt/pr48549.C

 // PR rtl-optimization/48549
 // { dg-do compile }
 // { dg-options "-fcompare-debug -O2" }
-// { dg-xfail-if "" { powerpc-ibm-aix* } }
 
 __extension__ typedef __PTRDIFF_TYPE__ pdiff_t;
 

gcc/testsuite/g++.dg/opt/pr60002.C

 // PR tree-optimization/60002
 // { dg-do compile }
 // { dg-options "-O2 -fcompare-debug -fdeclone-ctor-dtor -fipa-cp-clone" }
-// { dg-xfail-if "" { powerpc-ibm-aix* } }
 
 struct A {};
 

gcc/testsuite/g++.dg/opt/pr80436.C

 // PR debug/80436
 // { dg-do compile { target c++11 } }
 // { dg-options "-O3 -fcompare-debug" }
-// { dg-xfail-if "" { powerpc-ibm-aix* } }
 
 void fn (...);
 void foo (int, int, int);

gcc/testsuite/g++.dg/opt/pr83084.C

 // PR debug/83084
 // { dg-do compile }
 // { dg-options "-O2 -fcompare-debug -Wno-return-type" }
-// { dg-xfail-if "" { powerpc-ibm-aix* } }
 
 enum E { F };
 template <E = F> struct A {

gcc/testsuite/g++.dg/other/pr42685.C

 // { dg-do compile }
 // { dg-options "-O -funroll-loops -fcompare-debug" }
-// { dg-xfail-if "" { powerpc-ibm-aix* } }
 
 void Remap(int n, int *src, int *dst, int *map)
 {

gcc/testsuite/gcc.dg/pr41241.c

@@ -2,7 +2,6 @@
 /* { dg-do compile } */
 /* { dg-options "-O2 -fcompare-debug -g" } */
 /* { dg-options "-O2 -fcompare-debug -g -march=i586 -mtune=i586 -fomit-frame-pointer" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 typedef struct { int t1; int t2; int t3; } *T;
 typedef struct { int s; } S;

gcc/testsuite/gcc.dg/pr41345.c

 /* PR bootstrap/41345 */
 /* { dg-do compile } */
 /* { dg-options "-O2 -g -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
+/* { dg-xfail-if "AIX compare debug" { powerpc-ibm-aix* } } */
 
 void
 foo (int *x)

gcc/testsuite/gcc.dg/pr42629.c

@@ -4,7 +4,6 @@
 /* { dg-options "-O1 -fsched-pressure -fschedule-insns -fcompare-debug" { target scheduling } } */
 /* { dg-options "-O1 -fcompare-debug" { target { ! scheduling } } } */
 /* { dg-require-effective-target int32plus } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 int lzo_adler32(int adler, char *buf)
 {

gcc/testsuite/gcc.dg/pr42630.c

 /* { dg-do compile } */
 /* { dg-options "-O1 -fvariable-expansion-in-unroller -funroll-loops -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 int sum(int *buf, int len)
 {

gcc/testsuite/gcc.dg/pr42631.c

@@ -15,7 +15,7 @@
 
 /* { dg-do compile } */
 /* { dg-options "-g -O1 -funroll-loops -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
+/* { dg-xfail-if "AIX compare debug" { powerpc-ibm-aix* } } */
 
 void foo()
 {

gcc/testsuite/gcc.dg/pr42719.c

 /* PR tree-optimization/42719 */
 /* { dg-do compile } */
 /* { dg-options "-O2 -ftracer -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 int *v;
 

gcc/testsuite/gcc.dg/pr42728.c

 /* PR debug/42728 */
 /* { dg-do compile } */
 /* { dg-options "-O1 -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 void
 foo (char *a)

gcc/testsuite/gcc.dg/pr42889.c

 /* PR rtl-optimization/42889 */
 /* { dg-do compile } */
 /* { dg-options "-O -fgcse -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 extern int A[], B[];
 

gcc/testsuite/gcc.dg/pr42916.c

 /* { dg-do compile } */
 /* { dg-options "-O1 -funroll-loops -ftree-vectorize -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 int seed;
 

gcc/testsuite/gcc.dg/pr43084.c

 /* PR debug/43084 */
 /* { dg-do compile } */
 /* { dg-options "-O1 -fwhole-program -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 struct S
 {

gcc/testsuite/gcc.dg/pr43670.c

 /* PR debug/43670 */
 /* { dg-do compile } */
 /* { dg-options "-O -ftree-vrp -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 extern void abort (void);
 

gcc/testsuite/gcc.dg/pr44023.c

@@ -3,7 +3,6 @@
 /* { dg-options "-fcompare-debug -O2" } */
 /* { dg-options "-fcompare-debug -O2 -mcpu=ev67" { target alpha*-*-* } } */
 /* { dg-require-effective-target int32plus } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 void
 foo (unsigned f, long v, unsigned *w, unsigned a, unsigned b, unsigned e, unsigned c, unsigned d)

gcc/testsuite/gcc.dg/pr44971.c

 /* { dg-do compile } */
 /* { dg-options "-O2 -fcompare-debug -w" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 typedef struct
 {

gcc/testsuite/gcc.dg/pr45449.c

 /* { dg-do compile } */
 /* { dg-options "-O2 -fno-tree-pre -fno-tree-pta -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 struct S
 {

gcc/testsuite/gcc.dg/pr46771.c

 /* PR debug/46771 */
 /* { dg-do compile } */
 /* { dg-options "-O -ftree-vectorize -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 unsigned char v[1600];
 

gcc/testsuite/gcc.dg/pr47684.c

 /* PR debug/47684 */
 /* { dg-do compile } */
 /* { dg-options "-O3 -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 int in[8][4];
 int out[4];

gcc/testsuite/gcc.dg/pr47881.c

 /* PR debug/47881 */
 /* { dg-do compile } */
 /* { dg-options "-O -fcompare-debug -fno-dce -funroll-loops -fno-web" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 extern int data[];
 

gcc/testsuite/gcc.dg/pr48768.c

 /* PR debug/48768 */
 /* { dg-do compile } */
 /* { dg-options "-O -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 int a, b;
 

gcc/testsuite/gcc.dg/pr50017.c

 /* PR debug/50017 */
 /* { dg-do compile } */
 /* { dg-options "-O3 -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 struct S { int r, i; };
 

gcc/testsuite/gcc.dg/pr56023.c

 /* { dg-do compile } */
 /* { dg-options "-O2 -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 void
 foo (char *c)

gcc/testsuite/gcc.dg/pr64935-1.c

 /* PR rtl-optimization/64935 */
 /* { dg-do compile } */
 /* { dg-options "-std=gnu89 -Wno-shift-count-overflow -O2 -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 int a[] = {}, b[] = {}, c[] = {}, d[] = {}, e[] = {}, f[] = {}, h[] = {};
 int g[] = { 0 };

gcc/testsuite/gcc.dg/pr64935-2.c

@@ -2,7 +2,6 @@
 /* { dg-do compile } */
 /* { dg-options "-O -fschedule-insns --param=max-sched-ready-insns=1 -fcompare-debug" } */
 /* { dg-require-effective-target scheduling } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 void
 foo (int *data, unsigned len, const int qlp_coeff[],

gcc/testsuite/gcc.dg/pr65521.c

 /* PR ipa/65521 */
 /* { dg-do compile } */
 /* { dg-options "-O2 -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 struct S { int s; };
 int f6 (void *, unsigned long);

gcc/testsuite/gcc.dg/pr65779.c

 /* PR debug/65779 */
 /* { dg-do assemble } */
 /* { dg-options "-O2 -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 unsigned long
 foo (unsigned long x, unsigned char *y, unsigned int z)

gcc/testsuite/gcc.dg/pr65980.c

 /* PR rtl-optimization/65980 */
 /* { dg-do compile } */
 /* { dg-options "-O3 -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 typedef struct { int b; } A;
 void (*a) (int);

gcc/testsuite/gcc.dg/pr66688.c

 /* PR tree-optimization/66688 */
 /* { dg-do compile } */
 /* { dg-options "-O2 -fno-reorder-blocks -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 struct fdt_header { unsigned magic; } *a;
 

gcc/testsuite/gcc.dg/pr70405.c

@@ -2,7 +2,6 @@
 /* { dg-do compile } */
 /* { dg-options "-O2 -fcompare-debug" } */
 /* { dg-additional-options "-mavx512f" { target i?86-*-* x86_64-*-* } } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 typedef short V __attribute__ ((vector_size (32)));
 

gcc/testsuite/gcc.dg/torture/pr59166.c

 /* PR rtl-optimization/59166 */
 /* { dg-additional-options "-fcompare-debug" } */
-/* { dg-xfail-if "compare-debug failure" { powerpc-ibm-aix* } } */
+/* { dg-xfail-if "AIX compare debug" { powerpc-ibm-aix* } } */
 
 int a, b, c, f, g;
 

gcc/testsuite/gcc.dg/vect/pr49352.c

 /* PR tree-optimization/49352 */
 /* { dg-do compile } */
 /* { dg-additional-options "-O2 -fcompare-debug" } */
-/* { dg-xfail-if "" { powerpc-ibm-aix* } } */
 
 int
 foo (int *x, int *y, int n)