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Hello, Julio > These later things are ignored, I don't know if when the intrinsic is > lowered, then it doesn't matter (or perhaps the reorder is made > before). What is the description of the instruction you're lowering intrinsic into? Have you looked for the instruction flags defined in Target.td file? You instruction should definitely have "isBarrier" flag set.

Hello, I have an intrinsic that matches to a asm instruction directly. This intrinsic starts a coprocessor that can do anything. If I put another instruction next to it (a multiplication for example), the "llc" reorders and puts the intrinsic after the multiplication. I have tried all: - Setting the instruction like if it takes 256 cycles or 0 cycles. - Setting the instruction with

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