Hi I have a question: I compiled a program with gcc -mips1 , Compiler generate this list of instructions: ... .... ... 10b71c: 87a20018 lh v0,24(sp) 10b720: 00000000 nop 10b724: 144000b9 bnez v0,10ba0c 10b728: 0015ac03 sra s5,s5,0x10 ... .... ... but by a small change, some times in variables, (using same compiler switches) compiler don't insert nop between load and branch and generates this sequence of instructions: ... .... ... 10b754: 87a20018 lh v0,24(sp) 10b758: 144000b9 bnez v0,10ba40 10b75c: 0015ac03 sra s5,s5,0x10 ... .... ... would you please tell me the reason? why doesn't compiler detect hazard always? Thanks in advanced. Neda Zolfaghari (zneda@xxxxxxxxx)
