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clang-p2996/llvm/test/Transforms/LoopIdiom/X86/logical-right-shift-until-zero-debuginfo.ll
Stephen Tozer 094572701d [RemoveDIs] Print IR with debug records by default (#91724) 
This patch makes the final major change of the RemoveDIs project, changing the
default IR output from debug intrinsics to debug records. This is expected to
break a large number of tests: every single one that tests for uses or
declarations of debug intrinsics and does not explicitly disable writing
records. 

If this patch has broken your downstream tests (or upstream tests on a
configuration I wasn't able to run):
1. If you need to immediately unblock a build, pass
`--write-experimental-debuginfo=false` to LLVM's option processing for all
failing tests (remember to use `-mllvm` for clang/flang to forward arguments to
LLVM).
2. For most test failures, the changes are trivial and mechanical, enough that
they can be done by script; see the migration guide for a guide on how to do
this: https://llvm.org/docs/RemoveDIsDebugInfo.html#test-updates
3. If any tests fail for reasons other than FileCheck check lines that need
updating, such as assertion failures, that is most likely a real bug with this
patch and should be reported as such.

For more information, see the recent PSA:
https://discourse.llvm.org/t/psa-ir-output-changing-from-debug-intrinsics-to-debug-records/79578
2024-06-14 15:07:27 +01:00

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=debugify,loop-idiom -mtriple=x86_64 -mcpu=corei7 < %s -S | FileCheck %s --check-prefixes=NOLZCNT
; RUN: opt -passes=debugify,loop-idiom -mtriple=x86_64 -mcpu=core-avx2 < %s -S | FileCheck %s --check-prefixes=LZCNT
; RUN: opt -passes=debugify,loop-idiom -mtriple=x86_64 -mcpu=corei7 < %s -S --try-experimental-debuginfo-iterators | FileCheck %s --check-prefixes=NOLZCNT
declare void @escape_inner(i8, i8, i8, i1, i8)
declare void @escape_outer(i8, i8, i8, i1, i8)
define i8 @p(i8 %val, i8 %start, i8 %extraoffset) {
; NOLZCNT-LABEL: @p(
; NOLZCNT-NEXT: entry:
; NOLZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG20:![0-9]+]]
; NOLZCNT: loop:
; NOLZCNT-NEXT: [[IV:%.*]] = phi i8 [ [[START:%.*]], [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG21:![0-9]+]]
; NOLZCNT-NEXT: #dbg_value(i8 [[IV]], [[META9:![0-9]+]], !DIExpression(), [[DBG21]])
; NOLZCNT-NEXT: [[NBITS:%.*]] = add nsw i8 [[IV]], [[EXTRAOFFSET:%.*]], !dbg [[DBG22:![0-9]+]]
; NOLZCNT-NEXT: #dbg_value(i8 [[NBITS]], [[META11:![0-9]+]], !DIExpression(), [[DBG22]])
; NOLZCNT-NEXT: [[VAL_SHIFTED:%.*]] = lshr i8 [[VAL:%.*]], [[NBITS]], !dbg [[DBG23:![0-9]+]]
; NOLZCNT-NEXT: #dbg_value(i8 [[VAL_SHIFTED]], [[META12:![0-9]+]], !DIExpression(), [[DBG23]])
; NOLZCNT-NEXT: [[VAL_SHIFTED_ISZERO:%.*]] = icmp eq i8 [[VAL_SHIFTED]], 0, !dbg [[DBG24:![0-9]+]]
; NOLZCNT-NEXT: #dbg_value(i1 [[VAL_SHIFTED_ISZERO]], [[META13:![0-9]+]], !DIExpression(), [[DBG24]])
; NOLZCNT-NEXT: [[IV_NEXT]] = add i8 [[IV]], 1, !dbg [[DBG25:![0-9]+]]
; NOLZCNT-NEXT: #dbg_value(i8 [[IV_NEXT]], [[META14:![0-9]+]], !DIExpression(), [[DBG25]])
; NOLZCNT-NEXT: call void @escape_inner(i8 [[IV]], i8 [[NBITS]], i8 [[VAL_SHIFTED]], i1 [[VAL_SHIFTED_ISZERO]], i8 [[IV_NEXT]]), !dbg [[DBG26:![0-9]+]]
; NOLZCNT-NEXT: br i1 [[VAL_SHIFTED_ISZERO]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG27:![0-9]+]]
; NOLZCNT: end:
; NOLZCNT-NEXT: [[IV_RES:%.*]] = phi i8 [ [[IV]], [[LOOP]] ], !dbg [[DBG28:![0-9]+]]
; NOLZCNT-NEXT: [[NBITS_RES:%.*]] = phi i8 [ [[NBITS]], [[LOOP]] ], !dbg [[DBG29:![0-9]+]]
; NOLZCNT-NEXT: [[VAL_SHIFTED_RES:%.*]] = phi i8 [ [[VAL_SHIFTED]], [[LOOP]] ], !dbg [[DBG30:![0-9]+]]
; NOLZCNT-NEXT: [[VAL_SHIFTED_ISZERO_RES:%.*]] = phi i1 [ [[VAL_SHIFTED_ISZERO]], [[LOOP]] ], !dbg [[DBG31:![0-9]+]]
; NOLZCNT-NEXT: [[IV_NEXT_RES:%.*]] = phi i8 [ [[IV_NEXT]], [[LOOP]] ], !dbg [[DBG32:![0-9]+]]
; NOLZCNT-NEXT: #dbg_value(i8 [[IV_RES]], [[META15:![0-9]+]], !DIExpression(), [[DBG28]])
; NOLZCNT-NEXT: #dbg_value(i8 [[NBITS_RES]], [[META16:![0-9]+]], !DIExpression(), [[DBG29]])
; NOLZCNT-NEXT: #dbg_value(i8 [[VAL_SHIFTED_RES]], [[META17:![0-9]+]], !DIExpression(), [[DBG30]])
; NOLZCNT-NEXT: #dbg_value(i1 [[VAL_SHIFTED_ISZERO_RES]], [[META18:![0-9]+]], !DIExpression(), [[DBG31]])
; NOLZCNT-NEXT: #dbg_value(i8 [[IV_NEXT_RES]], [[META19:![0-9]+]], !DIExpression(), [[DBG32]])
; NOLZCNT-NEXT: call void @escape_outer(i8 [[IV_RES]], i8 [[NBITS_RES]], i8 [[VAL_SHIFTED_RES]], i1 [[VAL_SHIFTED_ISZERO_RES]], i8 [[IV_NEXT_RES]]), !dbg [[DBG33:![0-9]+]]
; NOLZCNT-NEXT: ret i8 [[IV_RES]], !dbg [[DBG34:![0-9]+]]
;
; LZCNT-LABEL: @p(
; LZCNT-NEXT: entry:
; LZCNT-NEXT: [[VAL_NUMLEADINGZEROS:%.*]] = call i8 @llvm.ctlz.i8(i8 [[VAL:%.*]], i1 false), !dbg [[DBG20:![0-9]+]]
; LZCNT-NEXT: [[VAL_NUMACTIVEBITS:%.*]] = sub nuw nsw i8 8, [[VAL_NUMLEADINGZEROS]], !dbg [[DBG20]]
; LZCNT-NEXT: [[TMP0:%.*]] = sub i8 0, [[EXTRAOFFSET:%.*]], !dbg [[DBG21:![0-9]+]]
; LZCNT-NEXT: [[VAL_NUMACTIVEBITS_OFFSET:%.*]] = add nsw i8 [[VAL_NUMACTIVEBITS]], [[TMP0]], !dbg [[DBG20]]
; LZCNT-NEXT: [[IV_FINAL:%.*]] = call i8 @llvm.smax.i8(i8 [[VAL_NUMACTIVEBITS_OFFSET]], i8 [[START:%.*]]), !dbg [[DBG20]]
; LZCNT-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nsw i8 [[IV_FINAL]], [[START]], !dbg [[DBG20]]
; LZCNT-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i8 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG20]]
; LZCNT-NEXT: br label [[LOOP:%.*]], !dbg [[DBG21]]
; LZCNT: loop:
; LZCNT-NEXT: [[LOOP_IV:%.*]] = phi i8 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG20]]
; LZCNT-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i8 [[LOOP_IV]], 1, !dbg [[DBG22:![0-9]+]]
; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i8 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG22]]
; LZCNT-NEXT: [[IV:%.*]] = add nsw i8 [[LOOP_IV]], [[START]], !dbg [[DBG22]]
; LZCNT-NEXT: #dbg_value(i8 [[IV]], [[META9:![0-9]+]], !DIExpression(), [[DBG20]])
; LZCNT-NEXT: [[NBITS:%.*]] = add nsw i8 [[IV]], [[EXTRAOFFSET]], !dbg [[DBG22]]
; LZCNT-NEXT: #dbg_value(i8 [[NBITS]], [[META11:![0-9]+]], !DIExpression(), [[DBG22]])
; LZCNT-NEXT: [[VAL_SHIFTED:%.*]] = lshr i8 [[VAL]], [[NBITS]], !dbg [[DBG23:![0-9]+]]
; LZCNT-NEXT: #dbg_value(i8 [[VAL_SHIFTED]], [[META12:![0-9]+]], !DIExpression(), [[DBG23]])
; LZCNT-NEXT: #dbg_value(i1 [[LOOP_IVCHECK]], [[META13:![0-9]+]], !DIExpression(), [[META24:![0-9]+]])
; LZCNT-NEXT: [[IV_NEXT:%.*]] = add i8 [[IV]], 1, !dbg [[DBG25:![0-9]+]]
; LZCNT-NEXT: #dbg_value(i8 [[IV_NEXT]], [[META14:![0-9]+]], !DIExpression(), [[DBG25]])
; LZCNT-NEXT: call void @escape_inner(i8 [[IV]], i8 [[NBITS]], i8 [[VAL_SHIFTED]], i1 [[LOOP_IVCHECK]], i8 [[IV_NEXT]]), !dbg [[DBG26:![0-9]+]]
; LZCNT-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG27:![0-9]+]]
; LZCNT: end:
; LZCNT-NEXT: [[IV_RES:%.*]] = phi i8 [ [[IV_FINAL]], [[LOOP]] ], !dbg [[DBG28:![0-9]+]]
; LZCNT-NEXT: [[NBITS_RES:%.*]] = phi i8 [ [[NBITS]], [[LOOP]] ], !dbg [[DBG29:![0-9]+]]
; LZCNT-NEXT: [[VAL_SHIFTED_RES:%.*]] = phi i8 [ [[VAL_SHIFTED]], [[LOOP]] ], !dbg [[DBG30:![0-9]+]]
; LZCNT-NEXT: [[VAL_SHIFTED_ISZERO_RES:%.*]] = phi i1 [ [[LOOP_IVCHECK]], [[LOOP]] ], !dbg [[DBG31:![0-9]+]]
; LZCNT-NEXT: [[IV_NEXT_RES:%.*]] = phi i8 [ [[IV_NEXT]], [[LOOP]] ], !dbg [[DBG32:![0-9]+]]
; LZCNT-NEXT: #dbg_value(i8 [[IV_RES]], [[META15:![0-9]+]], !DIExpression(), [[DBG28]])
; LZCNT-NEXT: #dbg_value(i8 [[NBITS_RES]], [[META16:![0-9]+]], !DIExpression(), [[DBG29]])
; LZCNT-NEXT: #dbg_value(i8 [[VAL_SHIFTED_RES]], [[META17:![0-9]+]], !DIExpression(), [[DBG30]])
; LZCNT-NEXT: #dbg_value(i1 [[VAL_SHIFTED_ISZERO_RES]], [[META18:![0-9]+]], !DIExpression(), [[DBG31]])
; LZCNT-NEXT: #dbg_value(i8 [[IV_NEXT_RES]], [[META19:![0-9]+]], !DIExpression(), [[DBG32]])
; LZCNT-NEXT: call void @escape_outer(i8 [[IV_RES]], i8 [[NBITS_RES]], i8 [[VAL_SHIFTED_RES]], i1 [[VAL_SHIFTED_ISZERO_RES]], i8 [[IV_NEXT_RES]]), !dbg [[DBG33:![0-9]+]]
; LZCNT-NEXT: ret i8 [[IV_RES]], !dbg [[DBG34:![0-9]+]]
;
entry:
br label %loop
loop:
%iv = phi i8 [ %start, %entry ], [ %iv.next, %loop ]
%nbits = add nsw i8 %iv, %extraoffset
%val.shifted = lshr i8 %val, %nbits
%val.shifted.iszero = icmp eq i8 %val.shifted, 0
%iv.next = add i8 %iv, 1
call void @escape_inner(i8 %iv, i8 %nbits, i8 %val.shifted, i1 %val.shifted.iszero, i8 %iv.next)
br i1 %val.shifted.iszero, label %end, label %loop
end:
%iv.res = phi i8 [ %iv, %loop ]
%nbits.res = phi i8 [ %nbits, %loop ]
%val.shifted.res = phi i8 [ %val.shifted, %loop ]
%val.shifted.iszero.res = phi i1 [ %val.shifted.iszero, %loop ]
%iv.next.res = phi i8 [ %iv.next, %loop ]
call void @escape_outer(i8 %iv.res, i8 %nbits.res, i8 %val.shifted.res, i1 %val.shifted.iszero.res, i8 %iv.next.res)
ret i8 %iv.res
}
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