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[framelowering] Improve tracking of first CS pop instruction. Summary: This patch makes sure FirstCSPop and MBBI never point to DBG_VALUE instructions, which affected the code generated. Reviewers: mkuper, aprantl, MatzeB Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D27343 llvm-svn: 288794
2016-12-06 18:24:55 +08:00
; Test ensuring debug intrinsics do not affect generated function prologue.
;
; RUN: llc -O1 -mtriple=x86_64-unknown-unknown -o - %s | FileCheck %s
[framelowering] Skip dbg values when getting next/previous instruction. Summary: In mergeSPUpdates, debug values need to be ignored when getting the previous element, otherwise debug data could have an impact on codegen. In eliminateCallFramePseudoInstr, debug values after the erased element could have an impact on codegen and should be skipped. Closes PR31319 (https://llvm.org/bugs/show_bug.cgi?id=31319) Reviewers: aprantl, MatzeB, mkuper Subscribers: gbedwell, llvm-commits Differential Revision: https://reviews.llvm.org/D27688 llvm-svn: 290955
2017-01-04 20:08:35 +08:00
define i64 @fn1NoDebug(i64 %a) {
[framelowering] Improve tracking of first CS pop instruction. Summary: This patch makes sure FirstCSPop and MBBI never point to DBG_VALUE instructions, which affected the code generated. Reviewers: mkuper, aprantl, MatzeB Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D27343 llvm-svn: 288794
2016-12-06 18:24:55 +08:00
%call = call i64 @fn(i64 %a, i64 0)
ret i64 %call
}
[framelowering] Skip dbg values when getting next/previous instruction. Summary: In mergeSPUpdates, debug values need to be ignored when getting the previous element, otherwise debug data could have an impact on codegen. In eliminateCallFramePseudoInstr, debug values after the erased element could have an impact on codegen and should be skipped. Closes PR31319 (https://llvm.org/bugs/show_bug.cgi?id=31319) Reviewers: aprantl, MatzeB, mkuper Subscribers: gbedwell, llvm-commits Differential Revision: https://reviews.llvm.org/D27688 llvm-svn: 290955
2017-01-04 20:08:35 +08:00
; CHECK-LABEL: fn1NoDebug
[framelowering] Improve tracking of first CS pop instruction. Summary: This patch makes sure FirstCSPop and MBBI never point to DBG_VALUE instructions, which affected the code generated. Reviewers: mkuper, aprantl, MatzeB Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D27343 llvm-svn: 288794
2016-12-06 18:24:55 +08:00
; CHECK: popq %rcx
Correct dwarf unwind information in function epilogue This patch aims to provide correct dwarf unwind information in function epilogue for X86. It consists of two parts. The first part inserts CFI instructions that set appropriate cfa offset and cfa register in emitEpilogue() in X86FrameLowering. This part is X86 specific. The second part is platform independent and ensures that: * CFI instructions do not affect code generation (they are not counted as instructions when tail duplicating or tail merging) * Unwind information remains correct when a function is modified by different passes. This is done in a late pass by analyzing information about cfa offset and cfa register in BBs and inserting additional CFI directives where necessary. Added CFIInstrInserter pass: * analyzes each basic block to determine cfa offset and register are valid at its entry and exit * verifies that outgoing cfa offset and register of predecessor blocks match incoming values of their successors * inserts additional CFI directives at basic block beginning to correct the rule for calculating CFA Having CFI instructions in function epilogue can cause incorrect CFA calculation rule for some basic blocks. This can happen if, due to basic block reordering, or the existence of multiple epilogue blocks, some of the blocks have wrong cfa offset and register values set by the epilogue block above them. CFIInstrInserter is currently run only on X86, but can be used by any target that implements support for adding CFI instructions in epilogue. Patch by Violeta Vukobrat. Differential Revision: https://reviews.llvm.org/D42848 llvm-svn: 330706
2018-04-24 18:32:08 +08:00
; CHECK-NEXT: .cfi_def_cfa_offset 8
[framelowering] Skip dbg values when getting next/previous instruction. Summary: In mergeSPUpdates, debug values need to be ignored when getting the previous element, otherwise debug data could have an impact on codegen. In eliminateCallFramePseudoInstr, debug values after the erased element could have an impact on codegen and should be skipped. Closes PR31319 (https://llvm.org/bugs/show_bug.cgi?id=31319) Reviewers: aprantl, MatzeB, mkuper Subscribers: gbedwell, llvm-commits Differential Revision: https://reviews.llvm.org/D27688 llvm-svn: 290955
2017-01-04 20:08:35 +08:00
; CHECK-NEXT: ret
[framelowering] Improve tracking of first CS pop instruction. Summary: This patch makes sure FirstCSPop and MBBI never point to DBG_VALUE instructions, which affected the code generated. Reviewers: mkuper, aprantl, MatzeB Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D27343 llvm-svn: 288794
2016-12-06 18:24:55 +08:00
[framelowering] Skip dbg values when getting next/previous instruction. Summary: In mergeSPUpdates, debug values need to be ignored when getting the previous element, otherwise debug data could have an impact on codegen. In eliminateCallFramePseudoInstr, debug values after the erased element could have an impact on codegen and should be skipped. Closes PR31319 (https://llvm.org/bugs/show_bug.cgi?id=31319) Reviewers: aprantl, MatzeB, mkuper Subscribers: gbedwell, llvm-commits Differential Revision: https://reviews.llvm.org/D27688 llvm-svn: 290955
2017-01-04 20:08:35 +08:00
define i64 @fn1WithDebug(i64 %a) !dbg !4 {
[framelowering] Improve tracking of first CS pop instruction. Summary: This patch makes sure FirstCSPop and MBBI never point to DBG_VALUE instructions, which affected the code generated. Reviewers: mkuper, aprantl, MatzeB Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D27343 llvm-svn: 288794
2016-12-06 18:24:55 +08:00
%call = call i64 @fn(i64 %a, i64 0)
tail call void @llvm.dbg.value(metadata i64 %call, i64 0, metadata !5, metadata !6), !dbg !7
ret i64 %call
}
[framelowering] Skip dbg values when getting next/previous instruction. Summary: In mergeSPUpdates, debug values need to be ignored when getting the previous element, otherwise debug data could have an impact on codegen. In eliminateCallFramePseudoInstr, debug values after the erased element could have an impact on codegen and should be skipped. Closes PR31319 (https://llvm.org/bugs/show_bug.cgi?id=31319) Reviewers: aprantl, MatzeB, mkuper Subscribers: gbedwell, llvm-commits Differential Revision: https://reviews.llvm.org/D27688 llvm-svn: 290955
2017-01-04 20:08:35 +08:00
; CHECK-LABEL: fn1WithDebug
[framelowering] Improve tracking of first CS pop instruction. Summary: This patch makes sure FirstCSPop and MBBI never point to DBG_VALUE instructions, which affected the code generated. Reviewers: mkuper, aprantl, MatzeB Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D27343 llvm-svn: 288794
2016-12-06 18:24:55 +08:00
; CHECK: popq %rcx
Correct dwarf unwind information in function epilogue This patch aims to provide correct dwarf unwind information in function epilogue for X86. It consists of two parts. The first part inserts CFI instructions that set appropriate cfa offset and cfa register in emitEpilogue() in X86FrameLowering. This part is X86 specific. The second part is platform independent and ensures that: * CFI instructions do not affect code generation (they are not counted as instructions when tail duplicating or tail merging) * Unwind information remains correct when a function is modified by different passes. This is done in a late pass by analyzing information about cfa offset and cfa register in BBs and inserting additional CFI directives where necessary. Added CFIInstrInserter pass: * analyzes each basic block to determine cfa offset and register are valid at its entry and exit * verifies that outgoing cfa offset and register of predecessor blocks match incoming values of their successors * inserts additional CFI directives at basic block beginning to correct the rule for calculating CFA Having CFI instructions in function epilogue can cause incorrect CFA calculation rule for some basic blocks. This can happen if, due to basic block reordering, or the existence of multiple epilogue blocks, some of the blocks have wrong cfa offset and register values set by the epilogue block above them. CFIInstrInserter is currently run only on X86, but can be used by any target that implements support for adding CFI instructions in epilogue. Patch by Violeta Vukobrat. Differential Revision: https://reviews.llvm.org/D42848 llvm-svn: 330706
2018-04-24 18:32:08 +08:00
; CHECK-NEXT: .cfi_def_cfa_offset 8
[framelowering] Skip dbg values when getting next/previous instruction. Summary: In mergeSPUpdates, debug values need to be ignored when getting the previous element, otherwise debug data could have an impact on codegen. In eliminateCallFramePseudoInstr, debug values after the erased element could have an impact on codegen and should be skipped. Closes PR31319 (https://llvm.org/bugs/show_bug.cgi?id=31319) Reviewers: aprantl, MatzeB, mkuper Subscribers: gbedwell, llvm-commits Differential Revision: https://reviews.llvm.org/D27688 llvm-svn: 290955
2017-01-04 20:08:35 +08:00
; CHECK-NEXT: ret
%struct.Buffer = type { i8, [63 x i8] }
define void @fn2NoDebug(%struct.Buffer* byval align 64 %p1) {
ret void
}
; CHECK-LABEL: fn2NoDebug
; CHECK: and
; CHECK-NOT: add
; CHECK-NOT: sub
; CHECK: mov
; CHECK-NEXT: pop
Correct dwarf unwind information in function epilogue This patch aims to provide correct dwarf unwind information in function epilogue for X86. It consists of two parts. The first part inserts CFI instructions that set appropriate cfa offset and cfa register in emitEpilogue() in X86FrameLowering. This part is X86 specific. The second part is platform independent and ensures that: * CFI instructions do not affect code generation (they are not counted as instructions when tail duplicating or tail merging) * Unwind information remains correct when a function is modified by different passes. This is done in a late pass by analyzing information about cfa offset and cfa register in BBs and inserting additional CFI directives where necessary. Added CFIInstrInserter pass: * analyzes each basic block to determine cfa offset and register are valid at its entry and exit * verifies that outgoing cfa offset and register of predecessor blocks match incoming values of their successors * inserts additional CFI directives at basic block beginning to correct the rule for calculating CFA Having CFI instructions in function epilogue can cause incorrect CFA calculation rule for some basic blocks. This can happen if, due to basic block reordering, or the existence of multiple epilogue blocks, some of the blocks have wrong cfa offset and register values set by the epilogue block above them. CFIInstrInserter is currently run only on X86, but can be used by any target that implements support for adding CFI instructions in epilogue. Patch by Violeta Vukobrat. Differential Revision: https://reviews.llvm.org/D42848 llvm-svn: 330706
2018-04-24 18:32:08 +08:00
; CHECK-NEXT: .cfi_def_cfa %rsp, 8
[framelowering] Skip dbg values when getting next/previous instruction. Summary: In mergeSPUpdates, debug values need to be ignored when getting the previous element, otherwise debug data could have an impact on codegen. In eliminateCallFramePseudoInstr, debug values after the erased element could have an impact on codegen and should be skipped. Closes PR31319 (https://llvm.org/bugs/show_bug.cgi?id=31319) Reviewers: aprantl, MatzeB, mkuper Subscribers: gbedwell, llvm-commits Differential Revision: https://reviews.llvm.org/D27688 llvm-svn: 290955
2017-01-04 20:08:35 +08:00
; CHECK-NEXT: ret
Cleanup tests to not share a DISubprogram between multiple Functions. rdar://problem/31926379 llvm-svn: 302166
2017-05-05 00:24:31 +08:00
define void @fn2WithDebug(%struct.Buffer* byval align 64 %p1) !dbg !8 {
call void @llvm.dbg.declare(metadata %struct.Buffer* %p1, metadata !9, metadata !6), !dbg !10
[framelowering] Skip dbg values when getting next/previous instruction. Summary: In mergeSPUpdates, debug values need to be ignored when getting the previous element, otherwise debug data could have an impact on codegen. In eliminateCallFramePseudoInstr, debug values after the erased element could have an impact on codegen and should be skipped. Closes PR31319 (https://llvm.org/bugs/show_bug.cgi?id=31319) Reviewers: aprantl, MatzeB, mkuper Subscribers: gbedwell, llvm-commits Differential Revision: https://reviews.llvm.org/D27688 llvm-svn: 290955
2017-01-04 20:08:35 +08:00
ret void
}
[framelowering] Improve tracking of first CS pop instruction. Summary: This patch makes sure FirstCSPop and MBBI never point to DBG_VALUE instructions, which affected the code generated. Reviewers: mkuper, aprantl, MatzeB Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D27343 llvm-svn: 288794
2016-12-06 18:24:55 +08:00
[framelowering] Skip dbg values when getting next/previous instruction. Summary: In mergeSPUpdates, debug values need to be ignored when getting the previous element, otherwise debug data could have an impact on codegen. In eliminateCallFramePseudoInstr, debug values after the erased element could have an impact on codegen and should be skipped. Closes PR31319 (https://llvm.org/bugs/show_bug.cgi?id=31319) Reviewers: aprantl, MatzeB, mkuper Subscribers: gbedwell, llvm-commits Differential Revision: https://reviews.llvm.org/D27688 llvm-svn: 290955
2017-01-04 20:08:35 +08:00
; CHECK-LABEL: fn2WithDebug
; CHECK: and
; CHECK-NOT: add
; CHECK-NOT: sub
; CHECK: mov
; CHECK-NEXT: pop
Correct dwarf unwind information in function epilogue This patch aims to provide correct dwarf unwind information in function epilogue for X86. It consists of two parts. The first part inserts CFI instructions that set appropriate cfa offset and cfa register in emitEpilogue() in X86FrameLowering. This part is X86 specific. The second part is platform independent and ensures that: * CFI instructions do not affect code generation (they are not counted as instructions when tail duplicating or tail merging) * Unwind information remains correct when a function is modified by different passes. This is done in a late pass by analyzing information about cfa offset and cfa register in BBs and inserting additional CFI directives where necessary. Added CFIInstrInserter pass: * analyzes each basic block to determine cfa offset and register are valid at its entry and exit * verifies that outgoing cfa offset and register of predecessor blocks match incoming values of their successors * inserts additional CFI directives at basic block beginning to correct the rule for calculating CFA Having CFI instructions in function epilogue can cause incorrect CFA calculation rule for some basic blocks. This can happen if, due to basic block reordering, or the existence of multiple epilogue blocks, some of the blocks have wrong cfa offset and register values set by the epilogue block above them. CFIInstrInserter is currently run only on X86, but can be used by any target that implements support for adding CFI instructions in epilogue. Patch by Violeta Vukobrat. Differential Revision: https://reviews.llvm.org/D42848 llvm-svn: 330706
2018-04-24 18:32:08 +08:00
; CHECK-NEXT: .cfi_def_cfa %rsp, 8
[framelowering] Skip dbg values when getting next/previous instruction. Summary: In mergeSPUpdates, debug values need to be ignored when getting the previous element, otherwise debug data could have an impact on codegen. In eliminateCallFramePseudoInstr, debug values after the erased element could have an impact on codegen and should be skipped. Closes PR31319 (https://llvm.org/bugs/show_bug.cgi?id=31319) Reviewers: aprantl, MatzeB, mkuper Subscribers: gbedwell, llvm-commits Differential Revision: https://reviews.llvm.org/D27688 llvm-svn: 290955
2017-01-04 20:08:35 +08:00
; CHECK-NEXT: ret
[framelowering] Improve tracking of first CS pop instruction. Summary: This patch makes sure FirstCSPop and MBBI never point to DBG_VALUE instructions, which affected the code generated. Reviewers: mkuper, aprantl, MatzeB Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D27343 llvm-svn: 288794
2016-12-06 18:24:55 +08:00
declare i64 @fn(i64, i64)
declare void @llvm.dbg.value(metadata, i64, metadata, metadata)
[framelowering] Skip dbg values when getting next/previous instruction. Summary: In mergeSPUpdates, debug values need to be ignored when getting the previous element, otherwise debug data could have an impact on codegen. In eliminateCallFramePseudoInstr, debug values after the erased element could have an impact on codegen and should be skipped. Closes PR31319 (https://llvm.org/bugs/show_bug.cgi?id=31319) Reviewers: aprantl, MatzeB, mkuper Subscribers: gbedwell, llvm-commits Differential Revision: https://reviews.llvm.org/D27688 llvm-svn: 290955
2017-01-04 20:08:35 +08:00
declare void @llvm.dbg.declare(metadata, metadata, metadata)
[framelowering] Improve tracking of first CS pop instruction. Summary: This patch makes sure FirstCSPop and MBBI never point to DBG_VALUE instructions, which affected the code generated. Reviewers: mkuper, aprantl, MatzeB Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D27343 llvm-svn: 288794
2016-12-06 18:24:55 +08:00
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!2,!3}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 4.0.0")
!1 = !DIFile(filename: "test.c", directory: "/")
!2 = !{i32 2, !"Dwarf Version", i32 4}
!3 = !{i32 2, !"Debug Info Version", i32 3}
!4 = distinct !DISubprogram(name: "withDebug", unit: !0)
!5 = !DILocalVariable(name: "w", scope: !4)
!6 = !DIExpression()
!7 = !DILocation(line: 210, column: 12, scope: !4)
Cleanup tests to not share a DISubprogram between multiple Functions. rdar://problem/31926379 llvm-svn: 302166
2017-05-05 00:24:31 +08:00
!8 = distinct !DISubprogram(name: "withDebug", unit: !0)
!9 = !DILocalVariable(name: "w", scope: !8)
!10 = !DILocation(line: 210, column: 12, scope: !8)