0ba8595287
Reapply commit d675b594f4 that was
reverted due to buildbot failures. A simple fix has been applied to
remove an assertion.
Differential Revision: https://reviews.llvm.org/D105207
89 lines
4.9 KiB
LLVM
89 lines
4.9 KiB
LLVM
; RUN: opt -S -loop-reduce %s -o - | FileCheck %s
|
|
; REQUIRES: x86-registered-target
|
|
|
|
;; Ensure that we retain debuginfo for the induction variable and dependant
|
|
;; variables when loop strength reduction is applied to the loop.
|
|
;; This IR produced from:
|
|
;;
|
|
;; clang -S -emit-llvm -Xclang -disable-llvm-passes -g lsr-basic.cpp -o
|
|
;; Then executing opt -O2 up to the the loopFullUnroll pass.
|
|
;; void mul_pow_of_2_to_shift_var_inc(unsigned size, unsigned *data, unsigned multiplicand) {
|
|
;; unsigned i = 0;
|
|
;; #pragma clang loop vectorize(disable)
|
|
;; while (i < size) {
|
|
;; unsigned comp = i * multiplicand;
|
|
;; data[i] = comp;
|
|
;; i++;
|
|
;; }
|
|
;; }
|
|
; CHECK: call void @llvm.dbg.value(metadata i64 %lsr.iv, metadata ![[i:[0-9]+]], metadata !DIExpression())
|
|
; CHECK: call void @llvm.dbg.value(metadata !DIArgList(i64 %lsr.iv, i32 %multiplicand), metadata ![[comp:[0-9]+]], metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_mul, DW_OP_stack_value))
|
|
; CHECK: call void @llvm.dbg.value(metadata i64 %lsr.iv, metadata ![[i]], metadata !DIExpression(DW_OP_consts, 1, DW_OP_plus, DW_OP_stack_value))
|
|
; CHECK: ![[i]] = !DILocalVariable(name: "i"
|
|
; CHECK: ![[comp]] = !DILocalVariable(name: "comp"
|
|
|
|
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-unknown-linux-gnu"
|
|
|
|
@__const.main.data = private unnamed_addr constant [16 x i32] [i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15], align 16
|
|
|
|
define dso_local void @_Z21mul_pow_of_2_to_shiftjPjj(i32 %size, i32* nocapture %data, i32 %multiplicand) local_unnamed_addr !dbg !7 {
|
|
entry:
|
|
call void @llvm.dbg.value(metadata i32 %size, metadata !12, metadata !DIExpression()), !dbg !13
|
|
call void @llvm.dbg.value(metadata i32* %data, metadata !14, metadata !DIExpression()), !dbg !13
|
|
call void @llvm.dbg.value(metadata i32 %multiplicand, metadata !15, metadata !DIExpression()), !dbg !13
|
|
call void @llvm.dbg.value(metadata i32 0, metadata !16, metadata !DIExpression()), !dbg !13
|
|
br label %while.cond, !dbg !13
|
|
|
|
while.cond: ; preds = %while.body, %entry
|
|
%i.0 = phi i32 [ 0, %entry ], [ %inc, %while.body ], !dbg !13
|
|
call void @llvm.dbg.value(metadata i32 %i.0, metadata !16, metadata !DIExpression()), !dbg !13
|
|
%cmp = icmp ult i32 %i.0, %size, !dbg !13
|
|
br i1 %cmp, label %while.body, label %while.end, !dbg !13
|
|
|
|
while.body: ; preds = %while.cond
|
|
%mul = mul i32 %i.0, %multiplicand, !dbg !17
|
|
call void @llvm.dbg.value(metadata i32 %mul, metadata !19, metadata !DIExpression()), !dbg !17
|
|
%idxprom = zext i32 %i.0 to i64, !dbg !17
|
|
%arrayidx = getelementptr inbounds i32, i32* %data, i64 %idxprom, !dbg !17
|
|
store i32 %mul, i32* %arrayidx, align 4, !dbg !17
|
|
%inc = add nuw i32 %i.0, 1, !dbg !17
|
|
call void @llvm.dbg.value(metadata i32 %inc, metadata !16, metadata !DIExpression()), !dbg !13
|
|
br label %while.cond, !dbg !13, !llvm.loop !20
|
|
|
|
while.end: ; preds = %while.cond
|
|
ret void, !dbg !13
|
|
}
|
|
|
|
declare void @llvm.dbg.value(metadata, metadata, metadata)
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!3, !4, !5}
|
|
!llvm.ident = !{!6}
|
|
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 13.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
|
|
!1 = !DIFile(filename: "basic.cpp", directory: "/test")
|
|
!2 = !{}
|
|
!3 = !{i32 7, !"Dwarf Version", i32 4}
|
|
!4 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!5 = !{i32 1, !"wchar_size", i32 4}
|
|
!6 = !{!"clang version 13.0.0"}
|
|
!7 = distinct !DISubprogram(name: "mul_pow_of_2_to_shift", linkageName: "_Z21mul_pow_of_2_to_shiftjPjj", scope: !1, file: !1, line: 17, type: !8, scopeLine: 17, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
|
|
!8 = !DISubroutineType(types: !9)
|
|
!9 = !{null, !10, !11, !10}
|
|
!10 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
|
|
!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64)
|
|
!12 = !DILocalVariable(name: "size", arg: 1, scope: !7, file: !1, line: 17, type: !10)
|
|
!13 = !DILocation(line: 0, scope: !7)
|
|
!14 = !DILocalVariable(name: "data", arg: 2, scope: !7, file: !1, line: 17, type: !11)
|
|
!15 = !DILocalVariable(name: "multiplicand", arg: 3, scope: !7, file: !1, line: 17, type: !10)
|
|
!16 = !DILocalVariable(name: "i", scope: !7, file: !1, line: 18, type: !10)
|
|
!17 = !DILocation(line: 21, column: 27, scope: !18)
|
|
!18 = distinct !DILexicalBlock(scope: !7, file: !1, line: 20, column: 22)
|
|
!19 = !DILocalVariable(name: "comp", scope: !18, file: !1, line: 21, type: !10)
|
|
!20 = distinct !{!20, !21, !22, !23, !24}
|
|
!21 = !DILocation(line: 20, column: 5, scope: !7)
|
|
!22 = !DILocation(line: 24, column: 5, scope: !7)
|
|
!23 = !{!"llvm.loop.mustprogress"}
|
|
!24 = !{!"llvm.loop.vectorize.width", i32 1}
|