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| author | Richard Henderson <rth@redhat.com> | 2007-03-07 10:13:29 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2007-03-07 10:13:29 -0800 |
| commit | 7476f0866c606870ed338f64269b840da3bcb1e4 (patch) | |
| tree | 9966163c9b3bfdf8faa218f12e89e2b2c8b20dd4 /gcc/reg-stack.c | |
| parent | 1611915067138d5ab84a3225599281b68943172f (diff) | |
| download | gcc-7476f0866c606870ed338f64269b840da3bcb1e4.zip gcc-7476f0866c606870ed338f64269b840da3bcb1e4.tar.gz gcc-7476f0866c606870ed338f64269b840da3bcb1e4.tar.bz2 | |
re PR target/30848 (ICE with invalid constraint in asm statement)
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.
From-SVN: r122669
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 e6802b1..8413ca3 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); |