search for: sras

...hitecture that I'm targeting with an LLVM back end has SRA instructions for all its data sizes, but is missing SRL instructions for some data sizes. I'm having trouble with the SelectionDAGISel::ShrinkDemandedOps() pass. Although it runs after the DAG has been legalized, it replaces legal SRAs with illegal SRLs, which results in failures in instruction selection. Is there a standard trick to work around this problem? -Ken

My target has only logical shifts and lacks an arithmetic right shift instruction. I have a custom LowerSRA function that rewrites SRA as SHL + SIGN_EXTEND when the shift width is either constant 16 or 24. Unfortunately, I observe that a later pass combines the SHL + SIGN_EXTEND back into SRA so we crash. The idea I had for defeating this behavior is lower to a target-specific version of SHL

...quot;S. rastrelliger"), name_2008 = c("ELAT", "OPIC", "SATR", "SCAR", "SCAU", "SCHR", "SMIN", "SMYS", "OYT", "SPIN", "STRE", "EJAC", "BFRE", "HDEC", "SRAS"), description = c("Striped Surfperch,", "Painted Greenling,", "kelp rockfish,", "gopher rockfish,", "copper rockfish,", "black and yellow rockfish,", "vermilion rockfish,", "blue rockfish,", "OYT (Olive/Yello...