2 Commits

Author	SHA1	Message	Date
Alex Bradbury	5dabe03b41	[RISCV][NFC] Add nounwind attribute to functions missing it in test/CodeGen/RISCV ... r360897 was incomplete, must have applied an old/wip patch. This is in preparation for emitting CFI directives. llvm-svn: 361493	2019-05-23 12:43:13 +00:00
Alex Bradbury	4d20cc21c7	[RISCV] Do a sign-extension in a compare-and-swap of 32 bit in RV64A ... AtomicCmpSwapWithSuccess is legalised into an AtomicCmpSwap plus a comparison. This requires an extension of the value which, by default, is a zero-extension. When we later lower AtomicCmpSwap into a PseudoCmpXchg32 and then expanded in RISCVExpandPseudoInsts.cpp, the lr.w instruction does a sign-extension. This mismatch of extensions causes the comparison to fail when the compared value is negative. This change overrides TargetLowering::getExtendForAtomicOps for RISC-V so it does a sign-extension instead. Differential Revision: https://reviews.llvm.org/D58829 Patch by Ferran Pallarès Roca. llvm-svn: 355869	2019-03-11 21:41:22 +00:00