llvm dev - Jan 2019 - "Didn't provide enough results" assertion

Hi,

I am getting this assertion when building my project: `Ops.size() >=
NumSrcResults && "Didn't provide enough results"'

this is the instruction that causes it:

def ASTI: F<0b100001,(outs),(ins i32imm:$i10s),"ASTI $i10s",[(set
SP, (i32 (add (i32 SP), (i32 sext12To32Trunc2imm:$i10s))))] > {


        let isReMaterializable = 1;
        let mayLoad = 0;
        let mayStore = 0;
        let Defs = [SP];
        let Uses = [SP];
}

I've been staring at it for a while and can't identify what the problem
is. It is supposed to add an immediate to the SP and store the result back in SP
(i.e. SP = SP + i10s). When I print Ops.size() and NumSrcResults, I get 0 and 2

Thanks.

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Quick update: If I add an output register, the assertion goes away.

def ASTI: F<0b100001,(outs CPURegs:$ra),(ins i32imm:$i10s),"ASTI
$i10s",[(set CPURegs:$ra, (i32 (add (i32 SP), (i32
sext12To32Trunc2imm:$i10s))))] > {

Why can't this instruction be without output register?
________________________________
From: m m
Sent: Saturday, January 12, 2019 1:58 PM
To: via llvm-dev
Subject: "Didn't provide enough results" assertion

Hi,

I am getting this assertion when building my project: `Ops.size() >=
NumSrcResults && "Didn't provide enough results"'

this is the instruction that causes it:

def ASTI: F<0b100001,(outs),(ins i32imm:$i10s),"ASTI $i10s",[(set
SP, (i32 (add (i32 SP), (i32 sext12To32Trunc2imm:$i10s))))] > {


        let isReMaterializable = 1;
        let mayLoad = 0;
        let mayStore = 0;
        let Defs = [SP];
        let Uses = [SP];
}

I've been staring at it for a while and can't identify what the problem
is. It is supposed to add an immediate to the SP and store the result back in SP
(i.e. SP = SP + i10s). When I print Ops.size() and NumSrcResults, I get 0 and 2

Thanks.

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