llvm-project

Author SHA1 Message Date

Author	SHA1	Message	Date
Nikita Popov	9ace4b337f	Revert "[SCEV] Factor out part of wrap flag detection logic [NFC-ish]" This reverts commit `1ec6e1eb8a`. This change causes a significant compile-time regression: https://llvm-compile-time-tracker.com/compare.php?from=dd0b8b94d0796bd895cc998dd163b4fbebceb0b8&to=1ec6e1eb8a084bffae8a40236eb9925d8026dd07&stat=instructions I assume that this is due to the non-NFC part of the change, which now performs expensive nowrap inference even for nowrap flags that are not used by the particular code.	2020-11-15 10:19:44 +01:00
Philip Reames	1ec6e1eb8a	[SCEV] Factor out part of wrap flag detection logic [NFC-ish] In an effort to make code around flag determination more readable, and (possibly) prepare for a follow up change, factor out some of the flag detection logic. In the process, reduce the number of locations we mutate wrap flags by a couple. Note that this isn't NFC. The old code tried for NSW xor (NUW \|\| NW). This is, two different paths computed different sets of wrap flags. The new code will try for all three. The result is that some expressions end up with a few extra flags set.	2020-11-14 19:21:05 -08:00
Sam Parker	db8a3c4206	[NFC] Create X86 subdirectory for indvar tests Many IndVarSiimplify tests target an x86 triple, so move them into a target specific folder.	2020-03-26 12:24:45 +00:00

Nikita Popov

9ace4b337f

Revert "[SCEV] Factor out part of wrap flag detection logic [NFC-ish]"

This reverts commit 1ec6e1eb8a.

This change causes a significant compile-time regression:
https://llvm-compile-time-tracker.com/compare.php?from=dd0b8b94d0796bd895cc998dd163b4fbebceb0b8&to=1ec6e1eb8a084bffae8a40236eb9925d8026dd07&stat=instructions

I assume that this is due to the non-NFC part of the change, which
now performs expensive nowrap inference even for nowrap flags that
are not used by the particular code.

2020-11-15 10:19:44 +01:00

Philip Reames

1ec6e1eb8a

[SCEV] Factor out part of wrap flag detection logic [NFC-ish]

In an effort to make code around flag determination more readable, and (possibly) prepare for a follow up change, factor out some of the flag detection logic.  In the process, reduce the number of locations we mutate wrap flags by a couple.

Note that this isn't NFC.  The old code tried for NSW xor (NUW || NW).  This is, two different paths computed different sets of wrap flags.  The new code will try for all three.  The result is that some expressions end up with a few extra flags set.

2020-11-14 19:21:05 -08:00

Sam Parker

db8a3c4206

[NFC] Create X86 subdirectory for indvar tests

Many IndVarSiimplify tests target an x86 triple, so move them into
a target specific folder.

2020-03-26 12:24:45 +00:00

3 Commits