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Fix inverted test and add testcase from failing self-host.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89167 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2009-11-18 00:02:18 +00:00
parent 427ef4e35f
commit 5052c1547e
2 changed files with 59 additions and 9 deletions
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16
lib/CodeGen/PHIElimination.cpp
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@ -449,14 +449,12 @@ MachineBasicBlock *PHIElimination::SplitCriticalEdge(MachineBasicBlock *A,
MachineFunction *MF = A->getParent();
// We may need to update A's terminator, but we can't do that if AnalyzeBranch
// fails.
if (A->isLayoutSuccessor(B)) {
const TargetInstrInfo *TII = MF->getTarget().getInstrInfo();
MachineBasicBlock *TBB = 0, *FBB = 0;
SmallVector<MachineOperand, 4> Cond;
if (!TII->AnalyzeBranch(*A, TBB, FBB, Cond))
return NULL;
}
// fails. If A uses a jump table, we won't touch it.
const TargetInstrInfo *TII = MF->getTarget().getInstrInfo();
MachineBasicBlock *TBB = 0, *FBB = 0;
SmallVector<MachineOperand, 4> Cond;
if (TII->AnalyzeBranch(*A, TBB, FBB, Cond))
return NULL;
++NumSplits;
@ -474,7 +472,7 @@ MachineBasicBlock *PHIElimination::SplitCriticalEdge(MachineBasicBlock *A,
// Insert unconditional "jump B" instruction in NMBB.
NMBB->addSuccessor(B);
SmallVector<MachineOperand, 4> Cond;
Cond.clear();
MF->getTarget().getInstrInfo()->InsertBranch(*NMBB, B, NULL, Cond);
// Fix PHI nodes in B so they refer to NMBB instead of A

52
test/CodeGen/X86/2009-11-17-UpdateTerminator.ll Normal file
View File

@ -0,0 +1,52 @@
; RUN: llc -O3 < %s
; This test fails with:
; Assertion failed: (!B && "UpdateTerminators requires analyzable predecessors!"), function updateTerminator, MachineBasicBlock.cpp, line 255.
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
target triple = "x86_64-apple-darwin10.2"
%"struct.llvm::InlineAsm::ConstraintInfo" = type { i32, i8, i8, i8, i8, %"struct.std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >,std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >" }
%"struct.std::_Vector_base<llvm::InlineAsm::ConstraintInfo,std::allocator<llvm::InlineAsm::ConstraintInfo> >" = type { %"struct.std::_Vector_base<llvm::InlineAsm::ConstraintInfo,std::allocator<llvm::InlineAsm::ConstraintInfo> >::_Vector_impl" }
%"struct.std::_Vector_base<llvm::InlineAsm::ConstraintInfo,std::allocator<llvm::InlineAsm::ConstraintInfo> >::_Vector_impl" = type { %"struct.llvm::InlineAsm::ConstraintInfo"*, %"struct.llvm::InlineAsm::ConstraintInfo"*, %"struct.llvm::InlineAsm::ConstraintInfo"* }
%"struct.std::_Vector_base<std::basic_string<char, std::char_traits<char>, std::allocator<char> >,std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >" = type { %"struct.std::_Vector_base<std::basic_string<char, std::char_traits<char>, std::allocator<char> >,std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::_Vector_impl" }
%"struct.std::_Vector_base<std::basic_string<char, std::char_traits<char>, std::allocator<char> >,std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::_Vector_impl" = type { %"struct.std::string"*, %"struct.std::string"*, %"struct.std::string"* }
%"struct.std::basic_string<char,std::char_traits<char>,std::allocator<char> >::_Alloc_hider" = type { i8* }
%"struct.std::string" = type { %"struct.std::basic_string<char,std::char_traits<char>,std::allocator<char> >::_Alloc_hider" }
%"struct.std::vector<llvm::InlineAsm::ConstraintInfo,std::allocator<llvm::InlineAsm::ConstraintInfo> >" = type { %"struct.std::_Vector_base<llvm::InlineAsm::ConstraintInfo,std::allocator<llvm::InlineAsm::ConstraintInfo> >" }
%"struct.std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >,std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >" = type { %"struct.std::_Vector_base<std::basic_string<char, std::char_traits<char>, std::allocator<char> >,std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >" }
define zeroext i8 @_ZN4llvm9InlineAsm14ConstraintInfo5ParseENS_9StringRefERSt6vectorIS1_SaIS1_EE(%"struct.llvm::InlineAsm::ConstraintInfo"* nocapture %this, i64 %Str.0, i64 %Str.1, %"struct.std::vector<llvm::InlineAsm::ConstraintInfo,std::allocator<llvm::InlineAsm::ConstraintInfo> >"* nocapture %ConstraintsSoFar) nounwind ssp align 2 {
entry:
br i1 undef, label %bb56, label %bb27.outer
bb8: ; preds = %bb27.outer108, %bb13
switch i8 undef, label %bb27.outer [
i8 35, label %bb56
i8 37, label %bb14
i8 38, label %bb10
i8 42, label %bb56
]
bb27.outer: ; preds = %bb8, %entry
%I.2.ph = phi i8* [ undef, %entry ], [ %I.2.ph109, %bb8 ] ; <i8*> [#uses=2]
br label %bb27.outer108
bb10: ; preds = %bb8
%toBool = icmp eq i8 0, 0 ; <i1> [#uses=1]
%or.cond = and i1 undef, %toBool ; <i1> [#uses=1]
br i1 %or.cond, label %bb13, label %bb56
bb13: ; preds = %bb10
br i1 undef, label %bb27.outer108, label %bb8
bb14: ; preds = %bb8
ret i8 1
bb27.outer108: ; preds = %bb13, %bb27.outer
%I.2.ph109 = getelementptr i8* %I.2.ph, i64 undef ; <i8*> [#uses=1]
%scevgep = getelementptr i8* %I.2.ph, i64 undef ; <i8*> [#uses=0]
br label %bb8
bb56: ; preds = %bb10, %bb8, %bb8, %entry
ret i8 1
}