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Author SHA1 Message Date
Tim Northover 8935aca9c7 CodeGenPrep: preserve inbounds attribute when sinking GEPs. 
Targets can potentially emit more efficient code if they know address
computations never overflow. For example ILP32 code on AArch64 (which only has
64-bit address computation) can ignore the possibility of overflow with this
extra information.

llvm-svn: 355926
 2019-03-12 15:22:23 +00:00
Evgeny Astigeevich 540a39adf7 [ARM, Thumb1] Prevent ARMTargetLowering::isLegalAddressingMode from accepting illegal modes 
ARMTargetLowering::isLegalAddressingMode can accept illegal addressing modes
for the Thumb1 target. This causes generation of redundant code and affects
performance.

This fixes PR34106: https://bugs.llvm.org/show_bug.cgi?id=34106

Differential Revision: https://reviews.llvm.org/D36467

llvm-svn: 311649
 2017-08-24 10:00:25 +00:00