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[MIR] Reset unique MBB numbering in MachineFunction::reset()

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No need to waste space nor number MBBs differently if MF gets recreated.

Reviewers: qcolombet, stoklund, t.p.northover, bogner, javed.absar

Reviewed By: qcolombet

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D46078

llvm-svn: 331213
This commit is contained in:
Roman Tereshin 2018-04-30 18:58:57 +00:00
parent 95f8f26080
commit 2a5c2d1d3e
2 changed files with 8 additions and 2 deletions
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1
lib/CodeGen/MachineFunction.cpp
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@ -196,6 +196,7 @@ void MachineFunction::clear() {
// Do call MachineBasicBlock destructors, it contains std::vectors.
for (iterator I = begin(), E = end(); I != E; I = BasicBlocks.erase(I))
I->Insts.clearAndLeakNodesUnsafely();
MBBNumbering.clear();
InstructionRecycler.clear(Allocator);
OperandRecycler.clear(Allocator);

9
test/CodeGen/MIR/AArch64/print-parse-verify-failedISel-property.mir
View File

@ -14,6 +14,7 @@
# 5) It's possible to start llc mid-GlobalISel pipeline from a MIR file with
# the FailedISel property set to true and watch it properly fallback to
# FastISel / SelectionDAG ISel.
# 6) Resetting a MachineFunction resets unique MachineBasicBlock IDs as well.
--- |
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64--"
@ -40,17 +41,21 @@ regBankSelected: true
failedISel: true
tracksRegLiveness: true
body: |
bb.1.entry:
bb.0.entry:
liveins: $w0, $w1
; CHECK: liveins: $w0, $w1
;
; CHECK: [[COPY:%[0-9]+]]:_(s32) = COPY $w0
; CHECK: [[COPY1:%[0-9]+]]:_(s32) = COPY $w1
; CHECK: [[ADD:%[0-9]+]]:gpr(s32) = G_ADD [[COPY1]], [[COPY]]
; CHECK: $w0 = COPY [[ADD]](s32)
; CHECK: RET_ReallyLR implicit $w0
;
; FALLBACK: liveins: $w0, $w1
; FALLBACK: body: |
; FALLBACK-NEXT: bb.0.entry:
; FALLBACK-NEXT: liveins: $w0, $w1
;
; FALLBACK: [[COPY:%[0-9]+]]:gpr32 = COPY $w1
; FALLBACK: [[COPY1:%[0-9]+]]:gpr32 = COPY $w0
; FALLBACK: [[ADDWrr:%[0-9]+]]:gpr32 = ADDWrr [[COPY]], [[COPY1]]