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Test: Transforms/InstSimplify/insertelement.ll
Summary: We can't remove insertelement undef to a vector, since it may be replacing a poison value.
define <4 x i32> @#1286 (<4 x i32> %A) {
%B = insertelement <4 x i32> %A, i32 undef, i32 1
ret <4 x i32> %B
}
=>
define <4 x i32> @#1286 (<4 x i32> %A) {
ret <4 x i32> %A
}
Transformation doesn't verify!
ERROR: Target is more poisonous than source
Extended Description
Test: Transforms/InstSimplify/insertelement.ll
Summary: We can't remove insertelement undef to a vector, since it may be replacing a poison value.
define <4 x i32> @#1286 (<4 x i32> %A) {
%B = insertelement <4 x i32> %A, i32 undef, i32 1
ret <4 x i32> %B
}
=>
define <4 x i32> @#1286 (<4 x i32> %A) {
ret <4 x i32> %A
}
Transformation doesn't verify!
ERROR: Target is more poisonous than source
Example:
<4 x i32> %A = < poison, poison, poison, poison >
Source:
<4 x i32> %B = < poison, undef, poison, poison >
Target:
Source value: < poison, undef, poison, poison >
Target value: < poison, poison, poison, poison >
Report: https://web.ist.utl.pt/nuno.lopes/alive2/index.php?hash=ed3ac07d4817b221&test=Transforms%2FInstSimplify%2Finsertelement.ll
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