diff options
Diffstat (limited to 'bz86593.patch')
| -rw-r--r-- | bz86593.patch | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/bz86593.patch b/bz86593.patch new file mode 100644 index 000000000000..aeea1e332422 --- /dev/null +++ b/bz86593.patch @@ -0,0 +1,80 @@ +Assert for SUPPORTS_STACK_ALIGNMENT was added for dynamic stack +alignment. At the time, arg_pointer_rtx would only be eliminated +by either hard_frame_pointer_rtx or stack_pointer_rtx only when +dynamic stack alignment is supported. With + +commit cd557ff63f388ad27c376d0a225e74d3594a6f9d +Author: hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4> +Date: Thu Aug 10 15:29:05 2017 +0000 + + i386: Don't use frame pointer without stack access + + When there is no stack access, there is no need to use frame pointer + even if -fno-omit-frame-pointer is used and caller's frame pointer is + unchanged. + +this can happen when there is no dynamic stack alignment. This patch +relaxes SUPPORTS_STACK_ALIGNMENT with !crtl->stack_realign_tried to +allow arg_pointer_rtx to be eliminated by either hard_frame_pointer_rtx +or stack_pointer_rtx when there is no dynamic stack alignment at all. + +gcc/ + + PR debug/86593 + * dwarf2out.c (based_loc_descr): Replace SUPPORTS_STACK_ALIGNMENT + with (SUPPORTS_STACK_ALIGNMENT || !crtl->stack_realign_tried). + (compute_frame_pointer_to_fb_displacement): Likewise. + +gcc/testsuite/ + + PR debug/86593 + * g++.dg/pr86593.C: New test. +--- + gcc/dwarf2out.c | 6 ++++-- + gcc/testsuite/g++.dg/pr86593.C | 11 +++++++++++ + 2 files changed, 15 insertions(+), 2 deletions(-) + create mode 100644 gcc/testsuite/g++.dg/pr86593.C + +diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c +index b67481dd2db..6ecdc4562d0 100644 +--- a/gcc/dwarf2out.c ++++ b/gcc/dwarf2out.c +@@ -14304,7 +14304,8 @@ based_loc_descr (rtx reg, poly_int64 offset, + if (elim != reg) + { + elim = strip_offset_and_add (elim, &offset); +- gcc_assert ((SUPPORTS_STACK_ALIGNMENT ++ gcc_assert (((SUPPORTS_STACK_ALIGNMENT ++ || !crtl->stack_realign_tried) + && (elim == hard_frame_pointer_rtx + || elim == stack_pointer_rtx)) + || elim == (frame_pointer_needed +@@ -20492,7 +20493,8 @@ compute_frame_pointer_to_fb_displacement (poly_int64 offset) + this, assume that while we cannot provide a proper value for + frame_pointer_fb_offset, we won't need one either. */ + frame_pointer_fb_offset_valid +- = ((SUPPORTS_STACK_ALIGNMENT ++ = (((SUPPORTS_STACK_ALIGNMENT ++ || !crtl->stack_realign_tried) + && (elim == hard_frame_pointer_rtx + || elim == stack_pointer_rtx)) + || elim == (frame_pointer_needed +diff --git a/gcc/testsuite/g++.dg/pr86593.C b/gcc/testsuite/g++.dg/pr86593.C +new file mode 100644 +index 00000000000..f4de0c1166a +--- /dev/null ++++ b/gcc/testsuite/g++.dg/pr86593.C +@@ -0,0 +1,11 @@ ++// { dg-options "-O -g -fno-omit-frame-pointer" } ++ ++struct Foo ++{ ++ int bar(int a, int b, int c, int i1, int i2, int i3, int d); ++}; ++ ++int Foo::bar(int a, int b, int c, int i1, int i2, int i3, int d) ++{ ++ return 0; ++} +-- +2.17.1 |