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| author | H.J. Lu <hjl@gcc.gnu.org> | 2017-08-13 11:31:39 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl@gcc.gnu.org> | 2017-08-13 11:31:39 -0700 |
| commit | 15879ef7ac321e3803d96f741a18f6865b0f5bfb (patch) | |
| tree | 7935b8ac03a2ed71e5cfe233d0329b11581f6497 /gcc | |
| parent | cfc72af0fbdfb2af54722bd5fa58b75eaa14c05f (diff) | |
| download | gcc-15879ef7ac321e3803d96f741a18f6865b0f5bfb.zip gcc-15879ef7ac321e3803d96f741a18f6865b0f5bfb.tar.gz gcc-15879ef7ac321e3803d96f741a18f6865b0f5bfb.tar.bz2 | |
i386: Replace frame pointer with stack pointer in debug insns
When we eliminate frame pointer, we should also replace frame pointer
with stack pointer - UNITS_PER_WORD in debug insns. This patch fixed:
FAIL: gcc.dg/guality/pr58791-5.c -Os line pr58791-5.c:20 b1 == 9
FAIL: gcc.dg/guality/pr58791-5.c -Os line pr58791-5.c:20 b2 == 73
FAIL: gcc.dg/guality/pr58791-5.c -Os line pr58791-5.c:20 b3 == 585
FAIL: gcc.dg/guality/pr58791-5.c -Os line pr58791-5.c:20 b4 == 4681
FAIL: gcc.dg/guality/pr59776.c -Os line pr59776.c:17 s1.f == 5.0
FAIL: gcc.dg/guality/pr59776.c -Os line pr59776.c:17 s1.g == 6.0
FAIL: gcc.dg/guality/pr59776.c -Os line pr59776.c:17 s2.g == 6.0
FAIL: gcc.dg/guality/pr59776.c -Os line pr59776.c:20 s1.f == 5.0
FAIL: gcc.dg/guality/pr59776.c -Os line pr59776.c:20 s1.g == 6.0
FAIL: gcc.dg/guality/pr59776.c -Os line pr59776.c:20 s2.f == 5.0
FAIL: gcc.dg/guality/pr59776.c -Os line pr59776.c:20 s2.g == 6.0
on Linux/i386.
PR target/81820
* config/i386/i386.c (ix86_finalize_stack_frame_flags): Replace
frame pointer with stack pointer - UNITS_PER_WORD in debug insns.
From-SVN: r251076
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/i386/i386.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index b04321a..1d88e4f 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -14281,6 +14281,42 @@ ix86_finalize_stack_frame_flags (void) df_scan_blocks (); df_compute_regs_ever_live (true); df_analyze (); + + if (flag_var_tracking) + { + /* Since frame pointer is no longer available, replace it with + stack pointer - UNITS_PER_WORD in debug insns. */ + df_ref ref, next; + for (ref = DF_REG_USE_CHAIN (HARD_FRAME_POINTER_REGNUM); + ref; ref = next) + { + rtx_insn *insn = DF_REF_INSN (ref); + /* Make sure the next ref is for a different instruction, + so that we're not affected by the rescan. */ + next = DF_REF_NEXT_REG (ref); + while (next && DF_REF_INSN (next) == insn) + next = DF_REF_NEXT_REG (next); + + if (DEBUG_INSN_P (insn)) + { + bool changed = false; + for (; ref != next; ref = DF_REF_NEXT_REG (ref)) + { + rtx *loc = DF_REF_LOC (ref); + if (*loc == hard_frame_pointer_rtx) + { + *loc = plus_constant (Pmode, + stack_pointer_rtx, + -UNITS_PER_WORD); + changed = true; + } + } + if (changed) + df_insn_rescan (insn); + } + } + } + recompute_frame_layout_p = true; } |