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7 Commits

Author SHA1 Message Date
Krzysztof Parzyszek 08a09822a5 [Hexagon] Improve generated code for test-if-bit-clear, one more time 
Adjust isel patterns after recent commit. Fixes https://llvm.org/PR43194.

llvm-svn: 370913
 2019-09-04 15:22:36 +00:00
Sanjay Patel 4e54cf3e0e [DAGCombiner] try to form test+set out of shift+mask patterns 
The motivating bugs are:
https://bugs.llvm.org/show_bug.cgi?id=41340
https://bugs.llvm.org/show_bug.cgi?id=42697

As discussed there, we could view this as a failure of IR canonicalization,
but then we would need to implement a backend fixup with target overrides
to get this right in all cases. Instead, we can just view this as a codegen
opportunity. It's not even clear for x86 exactly when we should favor
test+set; some CPUs have better theoretical throughput for the ALU ops than
bt/test.

This patch is made more complicated than I expected because there's an early
DAGCombine for 'and' that can change types of the intermediate ops via
trunc+anyext.

Differential Revision: https://reviews.llvm.org/D66687

llvm-svn: 370668
 2019-09-02 14:52:09 +00:00
Krzysztof Parzyszek 9e0feaf562 [Hexagon] Improve generated code for test-if-bit-clear 
llvm-svn: 369947
 2019-08-26 19:08:08 +00:00
Sanjay Patel 7bd08fbae9 [Hexagon] remove noise from tests; NFC 
llvm-svn: 369875
 2019-08-25 18:34:07 +00:00
Sanjay Patel b882c973ec [Hexagon][x86] add tests for bit-test; NFC 
More coverage for D66687
(assuming we make this a generic combine with TLI hook).

llvm-svn: 369874
 2019-08-25 18:25:22 +00:00
Roman Lebedev 54bd6c840e UpdateTestChecks: hexagon support 
Summary:
These tests are being affected by an upcoming patch,
so having an understandable (autogenerated) diff is helpful.

This target, again, prefers `-march`:
```
llvm/test/CodeGen/Hexagon$ grep -r triple | wc -l
467
llvm/test/CodeGen/Hexagon$ grep -r march | wc -l
1167
```

Reviewers: RKSimon, kparzysz

Reviewed By: kparzysz

Subscribers: xbolva00, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D62867

llvm-svn: 362605
 2019-06-05 14:08:01 +00:00
Krzysztof Parzyszek 046090db53 [Hexagon] Add more lit tests 
llvm-svn: 327271
 2018-03-12 14:01:28 +00:00