Descriptioncmd/5g: avoid temporary in slice bounds check
before
func addr(s[]int) *int {
return &s[2]
10c1c: e28d0008 add r0, sp, #8
10c20: e5901004 ldr r1, [r0, #4]
10c24: e3a02002 mov r2, #2
10c28: e1510002 cmp r1, r2
10c2c: 8a000000 bhi 10c34 <main.addr+0x34>
10c30: eb0035e6 bl 1e3d0 <runtime.panicindex>
10c34: e5900000 ldr r0, [r0]
10c38: e2800008 add r0, r0, #8
10c3c: e58d0014 str r0, [sp, #20]
10c40: e49df004 pop {pc} ; (ldr pc, [sp], #4)
after
func addr(s[]int) *int {
return &s[2]
10c1c: e28d0008 add r0, sp, #8
10c20: e5901004 ldr r1, [r0, #4]
10c24: e3510002 cmp r1, #2
10c28: 8a000000 bhi 10c30 <main.addr+0x30>
10c2c: eb0035e6 bl 1e3cc <runtime.panicindex>
10c30: e5900000 ldr r0, [r0]
10c34: e2800008 add r0, r0, #8
10c38: e58d0014 str r0, [sp, #20]
10c3c: e49df004 pop {pc} ; (ldr pc, [sp], #4)
Also, relax gcmp restriction that 2nd operand must be a register. A followup
CL will address the remaining TODO items.
Patch Set 1 #Patch Set 2 : diff -r 3e660456f301 https://code.google.com/p/go #Patch Set 3 : diff -r 3e660456f301 https://code.google.com/p/go #Patch Set 4 : diff -r 187194a52289 https://go.googlecode.com/hg/ #
MessagesTotal messages: 5
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