Nikita Popov 16327c04c1 Reapply "[CodeGen][X86] Expand USUBSAT to UMAX+SUB, also for vectors" ...

Related to https://bugs.llvm.org/show_bug.cgi?id=40123.

Rather than scalarizing, expand a vector USUBSAT into UMAX+SUB,
which produces much better code for X86.

Reapplying with updated SLPVectorizer tests.

Differential Revision: https://reviews.llvm.org/D56636

llvm-svn: 351219

2019-01-15 18:43:41 +00:00

..

AArch64

[CostModel][X86][AArch64] Adjust cost of the scalarization part of min/max reduction.

2018-12-10 06:58:58 +00:00

AMDGPU

[AMDGPU] Switch to the new addr space mapping by default

2018-02-02 16:07:16 +00:00

ARM

Add BROADCAST shuffle cost tests.

2018-10-23 13:00:22 +00:00

PowerPC

[PPC] Give unaligned memory access lower cost on processor that supports it

2017-02-17 22:29:39 +00:00

SystemZ

[SystemZ::TTI] Return zero cost for ICmp that becomes Load And Test.

2018-12-03 14:30:18 +00:00

X86

Reapply "[CodeGen][X86] Expand USUBSAT to UMAX+SUB, also for vectors"

2019-01-15 18:43:41 +00:00

no_info.ll

Roll forward r243250

2015-07-26 19:10:03 +00:00