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Unexpected instruction sequence on MIPS
- From: "Aaron W. LaFramboise" <aaronavay62 at aaronwl dot com>
- To: gcc-help at gcc dot gnu dot org
- Date: Tue, 14 Nov 2006 04:02:26 -0600
- Subject: Unexpected instruction sequence on MIPS
On a GCC 4.1.1 cross targeted to mips-mips-elf, this C input file:
int sum(int a, int b) {
return a + b + 42;
}
produces this output with -O3:
addiu v0,a0,42
jr ra
addu v0,a1,v0
Why does the compiler place "jr" before "addu"?