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13400
2011 Aug 19
2
[LLVMdev] LLVM ERROR: Cannot select error in simple i128 math?
...0xa5302b0: glue = carry_false [ID=7]
on this code:
target triple = "i386-pc-linux-gnu"
define i32 @fxpadd(i32 %cl) {
entry:
%0 = zext i32 %cl to i128
%1 = zext i32 %cl to i128
%2 = add i128 %1, %0
br label %L1001510
L1001510: ; preds = %L13400
%vr1484.5 = trunc i128 %2 to i32
ret i32 %vr1484.5
}
This code was whittled down from a fixed point math test by bugpoint, and further simplified by hand. The problem did not occur in 2.8.
(Removing the trivial branch makes the problem go away.)
I'm not sure where to begin debugging i...
2011 Aug 19
0
[LLVMdev] LLVM ERROR: Cannot select error in simple i128 math?
...ode:
>
> target triple = "i386-pc-linux-gnu"
>
> define i32 @fxpadd(i32 %cl) {
> entry:
> %0 = zext i32 %cl to i128
> %1 = zext i32 %cl to i128
> %2 = add i128 %1, %0
> br label %L1001510
>
> L1001510: ; preds = %L13400
> %vr1484.5 = trunc i128 %2 to i32
> ret i32 %vr1484.5
>
> }
>
> This code was whittled down from a fixed point math test by bugpoint, and further simplified by hand. The problem did not occur in 2.8.
> (Removing the trivial branch makes the problem go away.)
>
> I...