amd64/emit: ensure stack is 16-byte aligned

1 files changed, 4 insertions, 0 deletions

diff --git a/regalloc.c b/regalloc.c
index 6f08b5b..8f31b05 100644
--- a/regalloc.c
+++ b/regalloc.c
@@ -270,6 +270,8 @@ regalloc(struct function *fn)
    static union ref *stkslotrefsbuf[64];
    struct rega ra = {0};
 
+   fn->isleaf = 1;
+
    vinit(&stkslotrefs, stkslotrefsbuf, arraylength(stkslotrefsbuf));
    ra.allocs = xcalloc((ninstr*2 < MAXINSTR ? ninstr*2 : MAXINSTR) * sizeof(struct alloc));
    ra.nfreegpr = mctarg->ngpr - popcnt(mctarg->rglob->u);
@@ -329,6 +331,8 @@ regalloc(struct function *fn)
             struct call *call = &calltab.p[ins->r.i];
             struct bitset rspill[1] = {0};
 
+            fn->isleaf = 0;
+
             for (int r = mctarg->gpr0; r < mctarg->gpr0 + mctarg->ngpr; ++r)
                if (!bstest(mctarg->rglob, r) && !bstest(mctarg->rcallee, r))
                   bsset(rspill, r);