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[LoopIdiom][X86] Add non-LZCNT test coverage to 'rshift until zero' idiom tests

This commit is contained in:
Simon Pilgrim 2022-09-16 17:21:10 +01:00
parent 0422a4407f
commit 95c2c9c5c5
3 changed files with 2915 additions and 1449 deletions
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2768
llvm/test/Transforms/LoopIdiom/X86/arithmetic-right-shift-until-zero.ll
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109
llvm/test/Transforms/LoopIdiom/X86/logical-right-shift-until-zero-debuginfo.ll
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@ -1,48 +1,79 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -debugify -loop-idiom -mtriple=x86_64 -mcpu=core-avx2 < %s -S | FileCheck %s
; RUN: opt -debugify -loop-idiom -mtriple=x86_64 -mcpu=corei7 < %s -S | FileCheck %s --check-prefixes=NOLZCNT
; RUN: opt -debugify -loop-idiom -mtriple=x86_64 -mcpu=core-avx2 < %s -S | FileCheck %s --check-prefixes=LZCNT
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) {
; CHECK-LABEL: @p(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[VAL_NUMLEADINGZEROS:%.*]] = call i8 @llvm.ctlz.i8(i8 [[VAL:%.*]], i1 false), !dbg [[DBG20:![0-9]+]]
; CHECK-NEXT: [[VAL_NUMACTIVEBITS:%.*]] = sub nuw nsw i8 8, [[VAL_NUMLEADINGZEROS]], !dbg [[DBG20]]
; CHECK-NEXT: [[TMP0:%.*]] = sub i8 0, [[EXTRAOFFSET:%.*]], !dbg [[DBG21:![0-9]+]]
; CHECK-NEXT: [[VAL_NUMACTIVEBITS_OFFSET:%.*]] = add nsw i8 [[VAL_NUMACTIVEBITS]], [[TMP0]], !dbg [[DBG20]]
; CHECK-NEXT: [[IV_FINAL:%.*]] = call i8 @llvm.smax.i8(i8 [[VAL_NUMACTIVEBITS_OFFSET]], i8 [[START:%.*]]), !dbg [[DBG20]]
; CHECK-NEXT: [[LOOP_BACKEDGETAKENCOUNT:%.*]] = sub nsw i8 [[IV_FINAL]], [[START]], !dbg [[DBG20]]
; CHECK-NEXT: [[LOOP_TRIPCOUNT:%.*]] = add nuw nsw i8 [[LOOP_BACKEDGETAKENCOUNT]], 1, !dbg [[DBG20]]
; CHECK-NEXT: br label [[LOOP:%.*]], !dbg [[DBG21]]
; CHECK: loop:
; CHECK-NEXT: [[LOOP_IV:%.*]] = phi i8 [ 0, [[ENTRY:%.*]] ], [ [[LOOP_IV_NEXT:%.*]], [[LOOP]] ], !dbg [[DBG20]]
; CHECK-NEXT: [[LOOP_IV_NEXT]] = add nuw nsw i8 [[LOOP_IV]], 1, !dbg [[DBG20]]
; CHECK-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i8 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG20]]
; CHECK-NEXT: [[IV:%.*]] = add nsw i8 [[LOOP_IV]], [[START]], !dbg [[DBG20]]
; CHECK-NEXT: call void @llvm.dbg.value(metadata i8 [[IV]], metadata [[META9:![0-9]+]], metadata !DIExpression()), !dbg [[DBG20]]
; CHECK-NEXT: [[NBITS:%.*]] = add nsw i8 [[IV]], [[EXTRAOFFSET]], !dbg [[DBG22:![0-9]+]]
; CHECK-NEXT: call void @llvm.dbg.value(metadata i8 [[NBITS]], metadata [[META11:![0-9]+]], metadata !DIExpression()), !dbg [[DBG22]]
; CHECK-NEXT: [[VAL_SHIFTED:%.*]] = lshr i8 [[VAL]], [[NBITS]], !dbg [[DBG23:![0-9]+]]
; CHECK-NEXT: call void @llvm.dbg.value(metadata i8 [[VAL_SHIFTED]], metadata [[META12:![0-9]+]], metadata !DIExpression()), !dbg [[DBG23]]
; CHECK-NEXT: call void @llvm.dbg.value(metadata i1 [[LOOP_IVCHECK]], metadata [[META13:![0-9]+]], metadata !DIExpression()), !dbg [[DBG24:![0-9]+]]
; CHECK-NEXT: [[IV_NEXT:%.*]] = add i8 [[IV]], 1, !dbg [[DBG25:![0-9]+]]
; CHECK-NEXT: call void @llvm.dbg.value(metadata i8 [[IV_NEXT]], metadata [[META14:![0-9]+]], metadata !DIExpression()), !dbg [[DBG25]]
; CHECK-NEXT: call void @escape_inner(i8 [[IV]], i8 [[NBITS]], i8 [[VAL_SHIFTED]], i1 [[LOOP_IVCHECK]], i8 [[IV_NEXT]]), !dbg [[DBG26:![0-9]+]]
; CHECK-NEXT: br i1 [[LOOP_IVCHECK]], label [[END:%.*]], label [[LOOP]], !dbg [[DBG27:![0-9]+]]
; CHECK: end:
; CHECK-NEXT: [[IV_RES:%.*]] = phi i8 [ [[IV_FINAL]], [[LOOP]] ], !dbg [[DBG28:![0-9]+]]
; CHECK-NEXT: [[NBITS_RES:%.*]] = phi i8 [ [[NBITS]], [[LOOP]] ], !dbg [[DBG29:![0-9]+]]
; CHECK-NEXT: [[VAL_SHIFTED_RES:%.*]] = phi i8 [ [[VAL_SHIFTED]], [[LOOP]] ], !dbg [[DBG30:![0-9]+]]
; CHECK-NEXT: [[VAL_SHIFTED_ISZERO_RES:%.*]] = phi i1 [ [[LOOP_IVCHECK]], [[LOOP]] ], !dbg [[DBG31:![0-9]+]]
; CHECK-NEXT: [[IV_NEXT_RES:%.*]] = phi i8 [ [[IV_NEXT]], [[LOOP]] ], !dbg [[DBG32:![0-9]+]]
; CHECK-NEXT: call void @llvm.dbg.value(metadata i8 [[IV_RES]], metadata [[META15:![0-9]+]], metadata !DIExpression()), !dbg [[DBG28]]
; CHECK-NEXT: call void @llvm.dbg.value(metadata i8 [[NBITS_RES]], metadata [[META16:![0-9]+]], metadata !DIExpression()), !dbg [[DBG29]]
; CHECK-NEXT: call void @llvm.dbg.value(metadata i8 [[VAL_SHIFTED_RES]], metadata [[META17:![0-9]+]], metadata !DIExpression()), !dbg [[DBG30]]
; CHECK-NEXT: call void @llvm.dbg.value(metadata i1 [[VAL_SHIFTED_ISZERO_RES]], metadata [[META18:![0-9]+]], metadata !DIExpression()), !dbg [[DBG31]]
; CHECK-NEXT: call void @llvm.dbg.value(metadata i8 [[IV_NEXT_RES]], metadata [[META19:![0-9]+]], metadata !DIExpression()), !dbg [[DBG32]]
; CHECK-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]+]]
; CHECK-NEXT: ret i8 [[IV_RES]], !dbg [[DBG34:![0-9]+]]
; 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: call void @llvm.dbg.value(metadata i8 [[IV]], metadata [[META9:![0-9]+]], metadata !DIExpression()), !dbg [[DBG21]]
; NOLZCNT-NEXT: [[NBITS:%.*]] = add nsw i8 [[IV]], [[EXTRAOFFSET:%.*]], !dbg [[DBG22:![0-9]+]]
; NOLZCNT-NEXT: call void @llvm.dbg.value(metadata i8 [[NBITS]], metadata [[META11:![0-9]+]], metadata !DIExpression()), !dbg [[DBG22]]
; NOLZCNT-NEXT: [[VAL_SHIFTED:%.*]] = lshr i8 [[VAL:%.*]], [[NBITS]], !dbg [[DBG23:![0-9]+]]
; NOLZCNT-NEXT: call void @llvm.dbg.value(metadata i8 [[VAL_SHIFTED]], metadata [[META12:![0-9]+]], metadata !DIExpression()), !dbg [[DBG23]]
; NOLZCNT-NEXT: [[VAL_SHIFTED_ISZERO:%.*]] = icmp eq i8 [[VAL_SHIFTED]], 0, !dbg [[DBG24:![0-9]+]]
; NOLZCNT-NEXT: call void @llvm.dbg.value(metadata i1 [[VAL_SHIFTED_ISZERO]], metadata [[META13:![0-9]+]], metadata !DIExpression()), !dbg [[DBG24]]
; NOLZCNT-NEXT: [[IV_NEXT]] = add i8 [[IV]], 1, !dbg [[DBG25:![0-9]+]]
; NOLZCNT-NEXT: call void @llvm.dbg.value(metadata i8 [[IV_NEXT]], metadata [[META14:![0-9]+]], metadata !DIExpression()), !dbg [[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: call void @llvm.dbg.value(metadata i8 [[IV_RES]], metadata [[META15:![0-9]+]], metadata !DIExpression()), !dbg [[DBG28]]
; NOLZCNT-NEXT: call void @llvm.dbg.value(metadata i8 [[NBITS_RES]], metadata [[META16:![0-9]+]], metadata !DIExpression()), !dbg [[DBG29]]
; NOLZCNT-NEXT: call void @llvm.dbg.value(metadata i8 [[VAL_SHIFTED_RES]], metadata [[META17:![0-9]+]], metadata !DIExpression()), !dbg [[DBG30]]
; NOLZCNT-NEXT: call void @llvm.dbg.value(metadata i1 [[VAL_SHIFTED_ISZERO_RES]], metadata [[META18:![0-9]+]], metadata !DIExpression()), !dbg [[DBG31]]
; NOLZCNT-NEXT: call void @llvm.dbg.value(metadata i8 [[IV_NEXT_RES]], metadata [[META19:![0-9]+]], metadata !DIExpression()), !dbg [[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 [[DBG20]]
; LZCNT-NEXT: [[LOOP_IVCHECK:%.*]] = icmp eq i8 [[LOOP_IV_NEXT]], [[LOOP_TRIPCOUNT]], !dbg [[DBG20]]
; LZCNT-NEXT: [[IV:%.*]] = add nsw i8 [[LOOP_IV]], [[START]], !dbg [[DBG20]]
; LZCNT-NEXT: call void @llvm.dbg.value(metadata i8 [[IV]], metadata [[META9:![0-9]+]], metadata !DIExpression()), !dbg [[DBG20]]
; LZCNT-NEXT: [[NBITS:%.*]] = add nsw i8 [[IV]], [[EXTRAOFFSET]], !dbg [[DBG22:![0-9]+]]
; LZCNT-NEXT: call void @llvm.dbg.value(metadata i8 [[NBITS]], metadata [[META11:![0-9]+]], metadata !DIExpression()), !dbg [[DBG22]]
; LZCNT-NEXT: [[VAL_SHIFTED:%.*]] = lshr i8 [[VAL]], [[NBITS]], !dbg [[DBG23:![0-9]+]]
; LZCNT-NEXT: call void @llvm.dbg.value(metadata i8 [[VAL_SHIFTED]], metadata [[META12:![0-9]+]], metadata !DIExpression()), !dbg [[DBG23]]
; LZCNT-NEXT: call void @llvm.dbg.value(metadata i1 [[LOOP_IVCHECK]], metadata [[META13:![0-9]+]], metadata !DIExpression()), !dbg [[DBG24:![0-9]+]]
; LZCNT-NEXT: [[IV_NEXT:%.*]] = add i8 [[IV]], 1, !dbg [[DBG25:![0-9]+]]
; LZCNT-NEXT: call void @llvm.dbg.value(metadata i8 [[IV_NEXT]], metadata [[META14:![0-9]+]], metadata !DIExpression()), !dbg [[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: call void @llvm.dbg.value(metadata i8 [[IV_RES]], metadata [[META15:![0-9]+]], metadata !DIExpression()), !dbg [[DBG28]]
; LZCNT-NEXT: call void @llvm.dbg.value(metadata i8 [[NBITS_RES]], metadata [[META16:![0-9]+]], metadata !DIExpression()), !dbg [[DBG29]]
; LZCNT-NEXT: call void @llvm.dbg.value(metadata i8 [[VAL_SHIFTED_RES]], metadata [[META17:![0-9]+]], metadata !DIExpression()), !dbg [[DBG30]]
; LZCNT-NEXT: call void @llvm.dbg.value(metadata i1 [[VAL_SHIFTED_ISZERO_RES]], metadata [[META18:![0-9]+]], metadata !DIExpression()), !dbg [[DBG31]]
; LZCNT-NEXT: call void @llvm.dbg.value(metadata i8 [[IV_NEXT_RES]], metadata [[META19:![0-9]+]], metadata !DIExpression()), !dbg [[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

1487
llvm/test/Transforms/LoopIdiom/X86/logical-right-shift-until-zero.ll
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