diff options
Diffstat (limited to 'src/cmd/6g/gsubr.c')
| -rw-r--r-- | src/cmd/6g/gsubr.c | 37 |
1 files changed, 33 insertions, 4 deletions
diff --git a/src/cmd/6g/gsubr.c b/src/cmd/6g/gsubr.c index 231caa633..25a16a20e 100644 --- a/src/cmd/6g/gsubr.c +++ b/src/cmd/6g/gsubr.c @@ -1756,11 +1756,11 @@ sudoclean(void) * to release the register used for a. */ int -sudoaddable(Node *n, Addr *a) +sudoaddable(int as, Node *n, Addr *a) { int o, i, w; int oary[10]; - vlong v; + int64 v; Node n1, n2, n3, *nn, *l, *r; Node *reg, *reg1; Prog *p1; @@ -1770,8 +1770,13 @@ sudoaddable(Node *n, Addr *a) return 0; switch(n->op) { - default: - return 0; + case OLITERAL: + if(n->val.ctype != CTINT) + break; + v = mpgetfix(n->val.u.xval); + if(v >= 32000 || v <= -32000) + break; + goto lit; case ODOT: case ODOTPTR: @@ -1790,6 +1795,30 @@ sudoaddable(Node *n, Addr *a) reg1->op = OEMPTY; goto oindex; } + return 0; + +lit: + switch(as) { + default: + return 0; + case AADDB: case AADDW: case AADDL: case AADDQ: + case ASUBB: case ASUBW: case ASUBL: case ASUBQ: + case AANDB: case AANDW: case AANDL: case AANDQ: + case AORB: case AORW: case AORL: case AORQ: + case AXORB: case AXORW: case AXORL: case AXORQ: + case AINCB: case AINCW: case AINCL: case AINCQ: + case ADECB: case ADECW: case ADECL: case ADECQ: + case AMOVB: case AMOVW: case AMOVL: case AMOVQ: + break; + } + + cleani += 2; + reg = &clean[cleani-1]; + reg1 = &clean[cleani-2]; + reg->op = OEMPTY; + reg1->op = OEMPTY; + naddr(n, a); + goto yes; odot: o = dotoffset(n, oary, &nn); |