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llvm-project/llvm/test/Transforms/HotColdSplit/lifetime-markers-on-inputs-...

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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 12:52:47 +08:00
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -hotcoldsplit -hotcoldsplit-threshold=0 < %s 2>&1 | FileCheck %s
declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture)
declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture)
declare void @cold_use(i8*) cold
declare void @use(i8*)
; In this CFG, splitting will extract the blocks extract{1,2}. I.e., it will
; extract a lifetime.start marker, but not the corresponding lifetime.end
; marker. Make sure that a lifetime.start marker is emitted before the call to
; the split function, and *only* that marker.
;
; entry
; / \
; extract1 no-extract1
; (lt.start) |
; / |
; extract2 |
; \_____ |
; \ /
; exit
; (lt.end)
;
; After splitting, we should see:
;
; entry
; / \
; codeRepl no-extract1
; (lt.start) |
; \ /
; exit
; (lt.end)
Revert "[PM/CC1] Add -f[no-]split-cold-code CC1 option to toggle splitting" This broke Chromium's PGO build, it seems because hot-cold-splitting got turned on unintentionally. See comment on the code review for repro etc. > This patch adds -f[no-]split-cold-code CC1 options to clang. This allows > the splitting pass to be toggled on/off. The current method of passing > `-mllvm -hot-cold-split=true` to clang isn't ideal as it may not compose > correctly (say, with `-O0` or `-Oz`). > > To implement the -fsplit-cold-code option, an attribute is applied to > functions to indicate that they may be considered for splitting. This > removes some complexity from the old/new PM pipeline builders, and > behaves as expected when LTO is enabled. > > Co-authored by: Saleem Abdulrasool <compnerd@compnerd.org> > Differential Revision: https://reviews.llvm.org/D57265 > Reviewed By: Aditya Kumar, Vedant Kumar > Reviewers: Teresa Johnson, Aditya Kumar, Fedor Sergeev, Philip Pfaffe, Vedant Kumar This reverts commit 273c299d5d649a0222fbde03c9a41e41913751b4.
2020-10-19 18:23:22 +08:00
define void @only_lifetime_start_is_cold() {
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 12:52:47 +08:00
; CHECK-LABEL: @only_lifetime_start_is_cold(
; CHECK-NEXT: entry:
Revert "[CodeExtractor] Don't create bitcasts when inserting lifetime markers (NFCI)" This reverts commit 26ee8aff2b85ee28a2b2d0b1860d878b512fbdef. It's necessary to insert bitcast the pointer operand of a lifetime marker if it has an opaque pointer type. rdar://70560161
2020-10-23 02:11:12 +08:00
; CHECK-NEXT: [[LOCAL1:%.*]] = alloca i256
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 12:52:47 +08:00
; CHECK-NEXT: [[LOCAL1_CAST:%.*]] = bitcast i256* [[LOCAL1]] to i8*
; CHECK-NEXT: br i1 undef, label [[CODEREPL:%.*]], label [[NO_EXTRACT1:%.*]]
; CHECK: codeRepl:
Revert "[CodeExtractor] Don't create bitcasts when inserting lifetime markers (NFCI)" This reverts commit 26ee8aff2b85ee28a2b2d0b1860d878b512fbdef. It's necessary to insert bitcast the pointer operand of a lifetime marker if it has an opaque pointer type. rdar://70560161
2020-10-23 02:11:12 +08:00
; CHECK-NEXT: [[LT_CAST:%.*]] = bitcast i256* [[LOCAL1]] to i8*
; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 -1, i8* [[LT_CAST]])
; CHECK-NEXT: [[TARGETBLOCK:%.*]] = call i1 @only_lifetime_start_is_cold.cold.1(i8* [[LOCAL1_CAST]]) #3
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 12:52:47 +08:00
; CHECK-NEXT: br i1 [[TARGETBLOCK]], label [[NO_EXTRACT1]], label [[EXIT:%.*]]
; CHECK: no-extract1:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 1, i8* [[LOCAL1_CAST]])
; CHECK-NEXT: ret void
;
entry:
%local1 = alloca i256
%local1_cast = bitcast i256* %local1 to i8*
br i1 undef, label %extract1, label %no-extract1
extract1:
; lt.start
call void @llvm.lifetime.start.p0i8(i64 1, i8* %local1_cast)
call void @cold_use(i8* %local1_cast)
br i1 undef, label %extract2, label %no-extract1
extract2:
br label %exit
no-extract1:
br label %exit
exit:
; lt.end
call void @llvm.lifetime.end.p0i8(i64 1, i8* %local1_cast)
ret void
}
; In this CFG, splitting will extract the block extract1. I.e., it will extract
; a lifetime.end marker, but not the corresponding lifetime.start marker. Do
; not emit a lifetime.end marker after the call to the split function.
;
; entry
; (lt.start)
; / \
; no-extract1 extract1
; (lt.end) (lt.end)
; \ /
; exit
;
; After splitting, we should see:
;
; entry
; (lt.start)
; / \
; no-extract1 codeRepl
; (lt.end)
; \ /
; exit
Revert "[PM/CC1] Add -f[no-]split-cold-code CC1 option to toggle splitting" This broke Chromium's PGO build, it seems because hot-cold-splitting got turned on unintentionally. See comment on the code review for repro etc. > This patch adds -f[no-]split-cold-code CC1 options to clang. This allows > the splitting pass to be toggled on/off. The current method of passing > `-mllvm -hot-cold-split=true` to clang isn't ideal as it may not compose > correctly (say, with `-O0` or `-Oz`). > > To implement the -fsplit-cold-code option, an attribute is applied to > functions to indicate that they may be considered for splitting. This > removes some complexity from the old/new PM pipeline builders, and > behaves as expected when LTO is enabled. > > Co-authored by: Saleem Abdulrasool <compnerd@compnerd.org> > Differential Revision: https://reviews.llvm.org/D57265 > Reviewed By: Aditya Kumar, Vedant Kumar > Reviewers: Teresa Johnson, Aditya Kumar, Fedor Sergeev, Philip Pfaffe, Vedant Kumar This reverts commit 273c299d5d649a0222fbde03c9a41e41913751b4.
2020-10-19 18:23:22 +08:00
define void @only_lifetime_end_is_cold() {
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 12:52:47 +08:00
; CHECK-LABEL: @only_lifetime_end_is_cold(
; CHECK-NEXT: entry:
Revert "[CodeExtractor] Don't create bitcasts when inserting lifetime markers (NFCI)" This reverts commit 26ee8aff2b85ee28a2b2d0b1860d878b512fbdef. It's necessary to insert bitcast the pointer operand of a lifetime marker if it has an opaque pointer type. rdar://70560161
2020-10-23 02:11:12 +08:00
; CHECK-NEXT: [[LOCAL1:%.*]] = alloca i256
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 12:52:47 +08:00
; CHECK-NEXT: [[LOCAL1_CAST:%.*]] = bitcast i256* [[LOCAL1]] to i8*
; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 1, i8* [[LOCAL1_CAST]])
; CHECK-NEXT: br i1 undef, label [[NO_EXTRACT1:%.*]], label [[CODEREPL:%.*]]
; CHECK: no-extract1:
; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 1, i8* [[LOCAL1_CAST]])
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: codeRepl:
Revert "[CodeExtractor] Don't create bitcasts when inserting lifetime markers (NFCI)" This reverts commit 26ee8aff2b85ee28a2b2d0b1860d878b512fbdef. It's necessary to insert bitcast the pointer operand of a lifetime marker if it has an opaque pointer type. rdar://70560161
2020-10-23 02:11:12 +08:00
; CHECK-NEXT: call void @only_lifetime_end_is_cold.cold.1(i8* [[LOCAL1_CAST]]) #3
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 12:52:47 +08:00
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
; lt.start
%local1 = alloca i256
%local1_cast = bitcast i256* %local1 to i8*
call void @llvm.lifetime.start.p0i8(i64 1, i8* %local1_cast)
br i1 undef, label %no-extract1, label %extract1
no-extract1:
; lt.end
call void @llvm.lifetime.end.p0i8(i64 1, i8* %local1_cast)
br label %exit
extract1:
; lt.end
call void @cold_use(i8* %local1_cast)
call void @llvm.lifetime.end.p0i8(i64 1, i8* %local1_cast)
br label %exit
exit:
ret void
}
; In this CFG, splitting will extract the blocks extract{1,2,3}. Lifting the
; lifetime.end marker would be a miscompile.
Revert "[PM/CC1] Add -f[no-]split-cold-code CC1 option to toggle splitting" This broke Chromium's PGO build, it seems because hot-cold-splitting got turned on unintentionally. See comment on the code review for repro etc. > This patch adds -f[no-]split-cold-code CC1 options to clang. This allows > the splitting pass to be toggled on/off. The current method of passing > `-mllvm -hot-cold-split=true` to clang isn't ideal as it may not compose > correctly (say, with `-O0` or `-Oz`). > > To implement the -fsplit-cold-code option, an attribute is applied to > functions to indicate that they may be considered for splitting. This > removes some complexity from the old/new PM pipeline builders, and > behaves as expected when LTO is enabled. > > Co-authored by: Saleem Abdulrasool <compnerd@compnerd.org> > Differential Revision: https://reviews.llvm.org/D57265 > Reviewed By: Aditya Kumar, Vedant Kumar > Reviewers: Teresa Johnson, Aditya Kumar, Fedor Sergeev, Philip Pfaffe, Vedant Kumar This reverts commit 273c299d5d649a0222fbde03c9a41e41913751b4.
2020-10-19 18:23:22 +08:00
define void @do_not_lift_lifetime_end() {
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 12:52:47 +08:00
; CHECK-LABEL: @do_not_lift_lifetime_end(
; CHECK-NEXT: entry:
Revert "[CodeExtractor] Don't create bitcasts when inserting lifetime markers (NFCI)" This reverts commit 26ee8aff2b85ee28a2b2d0b1860d878b512fbdef. It's necessary to insert bitcast the pointer operand of a lifetime marker if it has an opaque pointer type. rdar://70560161
2020-10-23 02:11:12 +08:00
; CHECK-NEXT: [[LOCAL1:%.*]] = alloca i256
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 12:52:47 +08:00
; CHECK-NEXT: [[LOCAL1_CAST:%.*]] = bitcast i256* [[LOCAL1]] to i8*
; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 1, i8* [[LOCAL1_CAST]])
; CHECK-NEXT: br label [[HEADER:%.*]]
; CHECK: header:
; CHECK-NEXT: call void @use(i8* [[LOCAL1_CAST]])
; CHECK-NEXT: br i1 undef, label [[EXIT:%.*]], label [[CODEREPL:%.*]]
; CHECK: codeRepl:
Revert "[CodeExtractor] Don't create bitcasts when inserting lifetime markers (NFCI)" This reverts commit 26ee8aff2b85ee28a2b2d0b1860d878b512fbdef. It's necessary to insert bitcast the pointer operand of a lifetime marker if it has an opaque pointer type. rdar://70560161
2020-10-23 02:11:12 +08:00
; CHECK-NEXT: [[TARGETBLOCK:%.*]] = call i1 @do_not_lift_lifetime_end.cold.1(i8* [[LOCAL1_CAST]]) #3
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 12:52:47 +08:00
; CHECK-NEXT: br i1 [[TARGETBLOCK]], label [[HEADER]], label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
; lt.start
%local1 = alloca i256
%local1_cast = bitcast i256* %local1 to i8*
call void @llvm.lifetime.start.p0i8(i64 1, i8* %local1_cast)
br label %header
header:
; If the lifetime.end marker is lifted, this use becomes dead the second time
; the header block is executed.
call void @use(i8* %local1_cast)
br i1 undef, label %exit, label %extract1
extract1:
call void @cold_use(i8* %local1_cast)
br i1 undef, label %extract2, label %extract3
extract2:
; Backedge.
br label %header
extract3:
; lt.end
call void @llvm.lifetime.end.p0i8(i64 1, i8* %local1_cast)
br label %exit
exit:
ret void
}