Re: [PATCH] lower-bitint: Avoid merging non-mergeable stmt with cast and mergeable stmt [PR112902]

On Fri, 8 Dec 2023, Jakub Jelinek wrote: > Hi! > > Before bitint lowering, the IL has: > b.0_1 = b; > _2 = -b.0_1; > _3 = (unsigned _BitInt(512)) _2; > a.1_4 = a; > a.2_5 = (unsigned _BitInt(512)) a.1_4; > _6 = _3 * a.2_5; > on the first function. Now, gimple_lower_bitint has an

[PATCH] lower-bitint: Avoid merging non-mergeable stmt with cast and mergeable stmt [PR112902]

Hi! Before bitint lowering, the IL has: b.0_1 = b; _2 = -b.0_1; _3 = (unsigned _BitInt(512)) _2; a.1_4 = a; a.2_5 = (unsigned _BitInt(512)) a.1_4; _6 = _3 * a.2_5; on the first function. Now, gimple_lower_bitint has an optimization (when not -O0) that it avoids assigning underlying