diff options
| author | Richard Henderson <rth@redhat.com> | 2007-03-07 18:13:29 +0000 |
|---|---|---|
| committer | Richard Henderson <rth@redhat.com> | 2007-03-07 18:13:29 +0000 |
| commit | fee575e139dbf4de466022ee33569381954f5625 (patch) | |
| tree | 9966163c9b3bfdf8faa218f12e89e2b2c8b20dd4 /gcc/reg-stack.c | |
| parent | 172175608b1edd71d424fba21adbf6021f093355 (diff) | |
PR target/30848
* reg-stack.c (emit_swap_insn): If a malformed asm was seen,
silently fix up the stack in the case of a missing register.
git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@122669 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/reg-stack.c')
| -rw-r--r-- | gcc/reg-stack.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/gcc/reg-stack.c b/gcc/reg-stack.c index e6802b1e8ef..8413ca3a399 100644 --- a/gcc/reg-stack.c +++ b/gcc/reg-stack.c @@ -815,9 +815,19 @@ emit_swap_insn (rtx insn, stack regstack, rtx reg) hard_regno = get_hard_regnum (regstack, reg); - gcc_assert (hard_regno >= FIRST_STACK_REG); if (hard_regno == FIRST_STACK_REG) return; + if (hard_regno == -1) + { + /* Something failed if the register wasn't on the stack. If we had + malformed asms, we zapped the instruction itself, but that didn't + produce the same pattern of register sets as before. To prevent + further failure, adjust REGSTACK to include REG at TOP. */ + gcc_assert (any_malformed_asm); + regstack->reg[++regstack->top] = REGNO (reg); + return; + } + gcc_assert (hard_regno >= FIRST_STACK_REG); other_reg = regstack->top - (hard_regno - FIRST_STACK_REG); |