6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-07-23 01:30:19 +00:00
Code Issues Projects Releases Wiki Activity

While hoisting common code from if/else, hoist debug info intrinsics if they match.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129078 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2011-04-07 17:27:36 +00:00
parent 0433b21c98
commit 949666ea16
2 changed files with 71 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
lib/Transforms/Utils/SimplifyCFG.cpp
View File

@ -807,10 +807,15 @@ static bool HoistThenElseCodeToIf(BranchInst *BI) {
BasicBlock::iterator BB2_Itr = BB2->begin(); BasicBlock::iterator BB2_Itr = BB2->begin();
Instruction *I1 = BB1_Itr++, *I2 = BB2_Itr++; Instruction *I1 = BB1_Itr++, *I2 = BB2_Itr++;
while (isa<DbgInfoIntrinsic>(I1)) // Skip debug info if it is not identical.
I1 = BB1_Itr++; DbgInfoIntrinsic *DBI1 = dyn_cast<DbgInfoIntrinsic>(I1);
while (isa<DbgInfoIntrinsic>(I2)) DbgInfoIntrinsic *DBI2 = dyn_cast<DbgInfoIntrinsic>(I2);
I2 = BB2_Itr++; if (!DBI1 || !DBI2 || !DBI1->isIdenticalToWhenDefined(DBI2)) {
while (isa<DbgInfoIntrinsic>(I1))
I1 = BB1_Itr++;
while (isa<DbgInfoIntrinsic>(I2))
I2 = BB2_Itr++;
}
if (isa<PHINode>(I1) || !I1->isIdenticalToWhenDefined(I2) || if (isa<PHINode>(I1) || !I1->isIdenticalToWhenDefined(I2) ||
(isa<InvokeInst>(I1) && !isSafeToHoistInvoke(BB1, BB2, I1, I2))) (isa<InvokeInst>(I1) && !isSafeToHoistInvoke(BB1, BB2, I1, I2)))
return false; return false;
@ -834,11 +839,16 @@ static bool HoistThenElseCodeToIf(BranchInst *BI) {
I2->eraseFromParent(); I2->eraseFromParent();
I1 = BB1_Itr++; I1 = BB1_Itr++;
while (isa<DbgInfoIntrinsic>(I1))
I1 = BB1_Itr++;
I2 = BB2_Itr++; I2 = BB2_Itr++;
while (isa<DbgInfoIntrinsic>(I2)) // Skip debug info if it is not identical.
I2 = BB2_Itr++; DbgInfoIntrinsic *DBI1 = dyn_cast<DbgInfoIntrinsic>(I1);
DbgInfoIntrinsic *DBI2 = dyn_cast<DbgInfoIntrinsic>(I2);
if (!DBI1 || !DBI2 || !DBI1->isIdenticalToWhenDefined(DBI2)) {
while (isa<DbgInfoIntrinsic>(I1))
I1 = BB1_Itr++;
while (isa<DbgInfoIntrinsic>(I2))
I2 = BB2_Itr++;
}
} while (I1->isIdenticalToWhenDefined(I2)); } while (I1->isIdenticalToWhenDefined(I2));
return true; return true;

53
test/Transforms/SimplifyCFG/hoist-dbgvalue.ll Normal file
View File

@ -0,0 +1,53 @@
; RUN: opt -simplifycfg -S < %s | FileCheck %s
define i32 @foo(i32 %i) nounwind ssp {
call void @llvm.dbg.value(metadata !{i32 %i}, i64 0, metadata !6), !dbg !7
call void @llvm.dbg.value(metadata !8, i64 0, metadata !9), !dbg !11
%1 = icmp ne i32 %i, 0, !dbg !12
;CHECK: call i32 (...)* @bar()
;CHECK-NEXT: llvm.dbg.value
br i1 %1, label %2, label %4, !dbg !12
; <label>:2 ; preds = %0
%3 = call i32 (...)* @bar(), !dbg !13
call void @llvm.dbg.value(metadata !{i32 %3}, i64 0, metadata !9), !dbg !13
br label %6, !dbg !15
; <label>:4 ; preds = %0
%5 = call i32 (...)* @bar(), !dbg !16
call void @llvm.dbg.value(metadata !{i32 %5}, i64 0, metadata !9), !dbg !16
br label %6, !dbg !18
; <label>:6 ; preds = %4, %2
%k.0 = phi i32 [ %3, %2 ], [ %5, %4 ]
ret i32 %k.0, !dbg !19
}
declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
declare i32 @bar(...)
declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
!llvm.dbg.sp = !{!0}
!0 = metadata !{i32 589870, i32 0, metadata !1, metadata !"foo", metadata !"foo", metadata !"", metadata !1, i32 2, metadata !3, i1 false, i1 true, i32 0, i32 0, i32 0, i32 256, i1 false, i32 (i32)* @foo} ; [ DW_TAG_subprogram ]
!1 = metadata !{i32 589865, metadata !"b.c", metadata !"/private/tmp", metadata !2} ; [ DW_TAG_file_type ]
!2 = metadata !{i32 589841, i32 0, i32 12, metadata !"b.c", metadata !"/private/tmp", metadata !"clang", i1 true, i1 false, metadata !"", i32 0} ; [ DW_TAG_compile_unit ]
!3 = metadata !{i32 589845, metadata !1, metadata !"", metadata !1, i32 0, i64 0, i64 0, i32 0, i32 0, i32 0, metadata !4, i32 0, i32 0} ; [ DW_TAG_subroutine_type ]
!4 = metadata !{metadata !5}
!5 = metadata !{i32 589860, metadata !2, metadata !"int", null, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
!6 = metadata !{i32 590081, metadata !0, metadata !"i", metadata !1, i32 16777218, metadata !5, i32 0} ; [ DW_TAG_arg_variable ]
!7 = metadata !{i32 2, i32 13, metadata !0, null}
!8 = metadata !{i32 0}
!9 = metadata !{i32 590080, metadata !10, metadata !"k", metadata !1, i32 3, metadata !5, i32 0} ; [ DW_TAG_auto_variable ]
!10 = metadata !{i32 589835, metadata !0, i32 2, i32 16, metadata !1, i32 0} ; [ DW_TAG_lexical_block ]
!11 = metadata !{i32 3, i32 12, metadata !10, null}
!12 = metadata !{i32 4, i32 3, metadata !10, null}
!13 = metadata !{i32 5, i32 5, metadata !14, null}
!14 = metadata !{i32 589835, metadata !10, i32 4, i32 10, metadata !1, i32 1} ; [ DW_TAG_lexical_block ]
!15 = metadata !{i32 6, i32 3, metadata !14, null}
!16 = metadata !{i32 7, i32 5, metadata !17, null}
!17 = metadata !{i32 589835, metadata !10, i32 6, i32 10, metadata !1, i32 2} ; [ DW_TAG_lexical_block ]
!18 = metadata !{i32 8, i32 3, metadata !17, null}
!19 = metadata !{i32 9, i32 3, metadata !10, null}