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fix instruction matching errors in i386 CFI generation

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fdiv and fmul instructions were wrongly matched by the rules for
integer div and mul instructions, leading to incorrect conclusions
about register values being clobbered.
This commit is contained in:
Alex Dowad 2015-10-02 13:32:33 +02:00 committed by Rich Felker
parent 0650a05947
commit dc97951402
1 changed files with 3 additions and 3 deletions
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6
tools/add-cfi.i386.awk
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@ -188,9 +188,9 @@ function trashed(register) {
/(add|addl|sub|subl|and|or|xor|lea|sal|sar|shl|shr) %e(ax|bx|cx|dx|si|di|bp),/ {
trashed(get_reg1())
}
/i?mul [^,]*$/ { trashed("eax"); trashed("edx") }
/i?mul %e(ax|bx|cx|dx|si|di|bp),/ { trashed(get_reg1()) }
/i?div/ { trashed("eax"); trashed("edx") }
/^i?mul [^,]*$/ { trashed("eax"); trashed("edx") }
/^i?mul %e(ax|bx|cx|dx|si|di|bp),/ { trashed(get_reg1()) }
/^i?div/ { trashed("eax"); trashed("edx") }
/(dec|inc|not|neg|pop) %e(ax|bx|cx|dx|si|di|bp)/ { trashed(get_reg()) }
/cpuid/ { trashed("eax"); trashed("ebx"); trashed("ecx"); trashed("edx") }