-
Notifications
You must be signed in to change notification settings - Fork 12.7k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
[DeadStoreElimination] Salvage debug info from dead insts
According to `llvm-dwarfdump --statistics` this salvages 43 additional unique source variables in a stage2 build of clang. It increases the size of the .debug_loc section by 0.002% (or 2864 bytes). Differential Revision: https://reviews.llvm.org/D43220 llvm-svn: 325035
- llvmorg-21-init
- llvmorg-20.1.0-rc2
- llvmorg-20.1.0-rc1
- llvmorg-20-init
- llvmorg-19.1.7
- llvmorg-19.1.6
- llvmorg-19.1.5
- llvmorg-19.1.4
- llvmorg-19.1.3
- llvmorg-19.1.2
- llvmorg-19.1.1
- llvmorg-19.1.0
- llvmorg-19.1.0-rc4
- llvmorg-19.1.0-rc3
- llvmorg-19.1.0-rc2
- llvmorg-19.1.0-rc1
- llvmorg-19-init
- llvmorg-18.1.8
- llvmorg-18.1.7
- llvmorg-18.1.6
- llvmorg-18.1.5
- llvmorg-18.1.4
- llvmorg-18.1.3
- llvmorg-18.1.2
- llvmorg-18.1.1
- llvmorg-18.1.0
- llvmorg-18.1.0-rc4
- llvmorg-18.1.0-rc3
- llvmorg-18.1.0-rc2
- llvmorg-18.1.0-rc1
- llvmorg-18-init
- llvmorg-17.0.6
- llvmorg-17.0.5
- llvmorg-17.0.4
- llvmorg-17.0.3
- llvmorg-17.0.2
- llvmorg-17.0.1
- llvmorg-17.0.0
- llvmorg-17.0.0-rc4
- llvmorg-17.0.0-rc3
- llvmorg-17.0.0-rc2
- llvmorg-17.0.0-rc1
- llvmorg-17-init
- llvmorg-16.0.6
- llvmorg-16.0.5
- llvmorg-16.0.4
- llvmorg-16.0.3
- llvmorg-16.0.2
- llvmorg-16.0.1
- llvmorg-16.0.0
- llvmorg-16.0.0-rc4
- llvmorg-16.0.0-rc3
- llvmorg-16.0.0-rc2
- llvmorg-16.0.0-rc1
- llvmorg-16-init
- llvmorg-15.0.7
- llvmorg-15.0.6
- llvmorg-15.0.5
- llvmorg-15.0.4
- llvmorg-15.0.3
- llvmorg-15.0.2
- llvmorg-15.0.1
- llvmorg-15.0.0
- llvmorg-15.0.0-rc3
- llvmorg-15.0.0-rc2
- llvmorg-15.0.0-rc1
- llvmorg-15-init
- llvmorg-14.0.6
- llvmorg-14.0.5
- llvmorg-14.0.4
- llvmorg-14.0.3
- llvmorg-14.0.2
- llvmorg-14.0.1
- llvmorg-14.0.0
- llvmorg-14.0.0-rc4
- llvmorg-14.0.0-rc3
- llvmorg-14.0.0-rc2
- llvmorg-14.0.0-rc1
- llvmorg-14-init
- llvmorg-13.0.1
- llvmorg-13.0.1-rc3
- llvmorg-13.0.1-rc2
- llvmorg-13.0.1-rc1
- llvmorg-13.0.0
- llvmorg-13.0.0-rc4
- llvmorg-13.0.0-rc3
- llvmorg-13.0.0-rc2
- llvmorg-13.0.0-rc1
- llvmorg-13-init
- llvmorg-12.0.1
- llvmorg-12.0.1-rc4
- llvmorg-12.0.1-rc3
- llvmorg-12.0.1-rc2
- llvmorg-12.0.1-rc1
- llvmorg-12.0.0
- llvmorg-12.0.0-rc5
- llvmorg-12.0.0-rc4
- llvmorg-12.0.0-rc3
- llvmorg-12.0.0-rc2
- llvmorg-12.0.0-rc1
- llvmorg-12-init
- llvmorg-11.1.0
- llvmorg-11.1.0-rc3
- llvmorg-11.1.0-rc2
- llvmorg-11.1.0-rc1
- llvmorg-11.0.1
- llvmorg-11.0.1-rc2
- llvmorg-11.0.1-rc1
- llvmorg-11.0.0
- llvmorg-11.0.0-rc6
- llvmorg-11.0.0-rc5
- llvmorg-11.0.0-rc4
- llvmorg-11.0.0-rc3
- llvmorg-11.0.0-rc2
- llvmorg-11.0.0-rc1
- llvmorg-11-init
- llvmorg-10.0.1
- llvmorg-10.0.1-rc4
- llvmorg-10.0.1-rc3
- llvmorg-10.0.1-rc2
- llvmorg-10.0.1-rc1
- llvmorg-10.0.0
- llvmorg-10.0.0-rc6
- llvmorg-10.0.0-rc5
- llvmorg-10.0.0-rc4
- llvmorg-10.0.0-rc3
- llvmorg-10.0.0-rc2
- llvmorg-10.0.0-rc1
- llvmorg-10-init
- llvmorg-9.0.1
- llvmorg-9.0.1-rc3
- llvmorg-9.0.1-rc2
- llvmorg-9.0.1-rc1
- llvmorg-9.0.0
- llvmorg-9.0.0-rc6
- llvmorg-9.0.0-rc5
- llvmorg-9.0.0-rc4
- llvmorg-9.0.0-rc3
- llvmorg-9.0.0-rc2
- llvmorg-9.0.0-rc1
- llvmorg-8.0.1
- llvmorg-8.0.1-rc4
- llvmorg-8.0.1-rc3
- llvmorg-8.0.1-rc2
- llvmorg-8.0.1-rc1
- llvmorg-8.0.0
- llvmorg-8.0.0-rc5
- llvmorg-8.0.0-rc4
- llvmorg-8.0.0-rc3
- llvmorg-8.0.0-rc2
- llvmorg-8.0.0-rc1
- llvmorg-7.1.0
- llvmorg-7.1.0-rc1
- llvmorg-7.0.1
- llvmorg-7.0.1-rc3
- llvmorg-7.0.1-rc2
- llvmorg-7.0.1-rc1
- llvmorg-7.0.0
- llvmorg-7.0.0-rc3
- llvmorg-7.0.0-rc2
- llvmorg-7.0.0-rc1
Showing
2 changed files
with
43 additions
and
0 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,40 @@ | ||
; RUN: opt < %s -debugify -basicaa -dse -S | FileCheck %s | ||
|
||
target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128" | ||
|
||
declare noalias i8* @malloc(i32) | ||
|
||
declare void @test_f() | ||
|
||
define i32* @test_salvage() { | ||
; CHECK-LABEL: @test_salvage() | ||
; CHECK-NEXT: malloc | ||
; CHECK-NEXT: bitcast | ||
; CHECK-NEXT: call void @test_f() | ||
; CHECK-NEXT: store i32 0, i32* %P | ||
|
||
; Check that all four original local variables have their values preserved. | ||
; CHECK-NEXT: call void @llvm.dbg.value(metadata i8* %p, metadata !8, metadata !DIExpression()), !dbg !14 | ||
; CHECK-NEXT: call void @llvm.dbg.value(metadata i32* %P, metadata !10, metadata !DIExpression()), !dbg !15 | ||
; CHECK-NEXT: call void @llvm.dbg.value(metadata i32* %P, metadata !11, metadata !DIExpression(DW_OP_deref)), !dbg !18 | ||
; CHECK-NEXT: call void @llvm.dbg.value(metadata i32* %P, metadata !13, metadata !DIExpression(DW_OP_deref, DW_OP_plus_uconst, 1, DW_OP_stack_value)), !dbg !19 | ||
%p = tail call i8* @malloc(i32 4) | ||
%P = bitcast i8* %p to i32* | ||
%DEAD = load i32, i32* %P | ||
%DEAD2 = add i32 %DEAD, 1 | ||
store i32 %DEAD2, i32* %P | ||
call void @test_f() | ||
store i32 0, i32* %P | ||
ret i32* %P | ||
} | ||
|
||
; CHECK: !8 = !DILocalVariable(name: "1", scope: !5, file: !1, line: 1, type: !9) | ||
; CHECK: !10 = !DILocalVariable(name: "2", scope: !5, file: !1, line: 2, type: !9) | ||
; CHECK: !11 = !DILocalVariable(name: "3", scope: !5, file: !1, line: 3, type: !12) | ||
; CHECK: !13 = !DILocalVariable(name: "4", scope: !5, file: !1, line: 4, type: !12) | ||
; CHECK-DAG: !14 = !DILocation(line: 1, column: 1, scope: !5) | ||
; CHECK-DAG: !15 = !DILocation(line: 2, column: 1, scope: !5) | ||
; CHECK-DAG: !18 = !DILocation(line: 3, column: 1, scope: !5) | ||
; CHECK-DAG: !19 = !DILocation(line: 4, column: 1, scope: !5) | ||
; CHECK-DAG: !16 = !DILocation(line: 6, column: 1, scope: !5) | ||
; CHECK-DAG: !17 = !DILocation(line: 7, column: 1, scope: !5) |