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12 Commits

Author SHA1 Message Date
Nikita Popov
fcfc31fffb [InstCombine] Convert some tests to opaque pointers (NFC) 
Conversion was performed (without manual fixup) using:
https://gist.github.com/nikic/98357b71fd67756b0f064c9517b62a34
 2022-10-28 13:07:30 +02:00
Bjorn Pettersson
acdc419c89 [test] Use -passes=instcombine instead of -instcombine in lots of tests. NFC 
Another step moving away from the deprecated syntax of specifying
pass pipeline in opt.

Differential Revision: https://reviews.llvm.org/D119081
 2022-02-07 14:26:59 +01:00
Arthur Eubanks
1aa02b37e7 Revert "[BuildLibCalls/SimplifyLibCalls] Fix attributes on created CallInst instructions." 
This reverts commit 1eda5453f2dcc9a9a4b4578fe74163c529974503.

Causes https://crbug.com/1223647:
Incompatible argument and return types for 'returned' attribute
  tail call void @llvm.memset.p0i8.i64(i8* noalias noundef returned writeonly align 1 dereferenceable(255) %arraydecay, i8 0, i64 255, i1 false), !dbg !985
 2021-06-24 19:24:34 -07:00
Jonas Paulsson
1eda5453f2 [BuildLibCalls/SimplifyLibCalls] Fix attributes on created CallInst instructions. 
- When emitting libcalls, do not only pass the calling convention from the
  function prototype but also the attributes.

- Do not pass attributes from e.g. libc memcpy to llvm.memcpy.

Review: Reid Kleckner, Eli Friedman, Arthur Eubanks

Differential Revision: https://reviews.llvm.org/D103992
 2021-06-24 14:47:24 -05:00
Dávid Bolvanský
cd54c57919 Reland "[Libcalls, Attrs] Annotate libcalls with noundef" 
Fixed Clang tests.
 2021-02-20 06:18:48 +01:00
Dávid Bolvanský
94d034fb86 Revert "[Libcalls, Attrs] Annotate libcalls with noundef" 
This reverts commit 33b0c63775ce58014c55e285671e3315104a6076. Bots are failing. Some Clang tests need to be updated too.
 2021-02-20 04:18:42 +01:00
Dávid Bolvanský
33b0c63775 [Libcalls, Attrs] Annotate libcalls with noundef 
I think we can use here same logic as for nonnull.

strlen(X) - X must be noundef => valid pointer.

for libcalls with size arg, we add noundef only if size is known and greater than 0 - so pointers must be noundef (valid ones)

Reviewed By: jdoerfert, aqjune

Differential Revision: https://reviews.llvm.org/D95122
 2021-02-20 04:10:07 +01:00
David Bolvansky
e80fcf0340 [SimplifyLibCalls] Mark known arguments with nonnull 
Reviewers: efriedma, jdoerfert

Reviewed By: jdoerfert

Subscribers: ychen, rsmith, joerg, aaron.ballman, lebedev.ri, uenoku, jdoerfert, hfinkel, javed.absar, spatel, dmgreen, llvm-commits

Differential Revision: https://reviews.llvm.org/D53342

llvm-svn: 372091
 2019-09-17 09:32:52 +00:00
David Bolvansky
39130314fe [SimplifyLibCalls] Add dereferenceable bytes from known callsites 
Summary:
int mm(char *a, char *b) {
    return memcmp(a,b,16);
}

Currently:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
  %call = tail call i32 @memcmp(i8* %a, i8* %b, i64 16)
  ret i32 %call
}

After patch:
define dso_local i32 @mm(i8* nocapture readonly %a, i8* nocapture readonly %b) local_unnamed_addr #1 {
entry:
  %call = tail call i32 @memcmp(i8* dereferenceable(16)  %a, i8* dereferenceable(16)  %b, i64 16)
  ret i32 %call
}




Reviewers: jdoerfert, efriedma

Reviewed By: jdoerfert

Subscribers: javed.absar, spatel, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D66079

llvm-svn: 368657
 2019-08-13 09:11:49 +00:00
Eric Christopher
cee313d288 Revert "Temporarily Revert "Add basic loop fusion pass."" 
The reversion apparently deleted the test/Transforms directory.

Will be re-reverting again.

llvm-svn: 358552
 2019-04-17 04:52:47 +00:00
Eric Christopher
a863435128 Temporarily Revert "Add basic loop fusion pass." 
As it's causing some bot failures (and per request from kbarton).

This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda.

llvm-svn: 358546
 2019-04-17 02:12:23 +00:00
Sam Parker
214f7bf5cc Enable simplify libcalls for ARM PCS 
Teach SimplifyLibcalls that in can treat functions annotated with
apcs, aapcs or aapcs_vfp like normal C functions if they only take
and return integer or pointer values, and the target is not iOS.

Differential Revision: https://reviews.llvm.org/D24453

llvm-svn: 281322
 2016-09-13 12:10:14 +00:00