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| author | Joern Rennecke <amylaar@gcc.gnu.org> | 1997-04-09 18:50:38 +0100 |
|---|---|---|
| committer | Joern Rennecke <amylaar@gcc.gnu.org> | 1997-04-09 18:50:38 +0100 |
| commit | 20ec31d3056be8424863e84d4261d5d5d7945cc7 (patch) | |
| tree | cd4a5543949ad7ddd6cdfa98b67b5bf6215814cf /gcc/config/sh | |
| parent | 74452ac3234316852e4f63d48f62db44991649b2 (diff) | |
| download | gcc-20ec31d3056be8424863e84d4261d5d5d7945cc7.zip gcc-20ec31d3056be8424863e84d4261d5d5d7945cc7.tar.gz gcc-20ec31d3056be8424863e84d4261d5d5d7945cc7.tar.bz2 | |
(output_stack_adjust): When splitting an adjustment into two parts,
make sure the stack is aligned at all times.
From-SVN: r13846
Diffstat (limited to 'gcc/config/sh')
| -rw-r--r-- | gcc/config/sh/sh.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/gcc/config/sh/sh.c b/gcc/config/sh/sh.c index 0f3a94f..12a49ca 100644 --- a/gcc/config/sh/sh.c +++ b/gcc/config/sh/sh.c @@ -2490,11 +2490,15 @@ output_stack_adjust (size, reg, temp) if (! CONST_OK_FOR_I (size)) { - if (CONST_OK_FOR_I (size / 2) && CONST_OK_FOR_I (size - size / 2)) + /* Try to do it with two partial adjustments; however, must make + sure that the stack is properly aligned at all times, in case + an interrupt occurs between the two partial adjustments. */ + if (CONST_OK_FOR_I (size / 2 & -4) + && CONST_OK_FOR_I (size - (size / 2 & -4))) { - val = GEN_INT (size / 2); + val = GEN_INT (size / 2 & -4); emit_insn (gen_addsi3 (reg, reg, val)); - val = GEN_INT (size - size / 2); + val = GEN_INT (size - (size / 2 & -4)); } else { |