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Fix small bug in handling instructions with more than one implicitly defined operand.

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ProcessImplicitDefs would only mark one operand per instruction with <undef>.
This fixed PR6086.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95319 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2010-02-04 18:46:28 +00:00
parent 66c439af28
commit e4d2d96cc8
2 changed files with 28 additions and 1 deletions
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2
lib/CodeGen/ProcessImplicitDefs.cpp
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@ -264,8 +264,8 @@ bool ProcessImplicitDefs::runOnMachineFunction(MachineFunction &fn) {
}
}
RUses.clear();
ModInsts.clear();
}
ModInsts.clear();
ImpDefRegs.clear();
ImpDefMIs.clear();
}

27
test/CodeGen/X86/2010-02-03-DualUndef.ll Normal file
View File

@ -0,0 +1,27 @@
; RUN: llc < %s -march=x86-64
; PR6086
define fastcc void @prepOutput() nounwind {
bb: ; preds = %output.exit
br label %bb.i1
bb.i1: ; preds = %bb7.i, %bb
br i1 undef, label %bb7.i, label %bb.nph.i
bb.nph.i: ; preds = %bb.i1
br label %bb3.i
bb3.i: ; preds = %bb5.i6, %bb.nph.i
%tmp10.i = trunc i64 undef to i32 ; <i32> [#uses=1]
br i1 undef, label %bb4.i, label %bb5.i6
bb4.i: ; preds = %bb3.i
br label %bb5.i6
bb5.i6: ; preds = %bb4.i, %bb3.i
%0 = phi i32 [ undef, %bb4.i ], [ undef, %bb3.i ] ; <i32> [#uses=1]
%1 = icmp slt i32 %0, %tmp10.i ; <i1> [#uses=1]
br i1 %1, label %bb7.i, label %bb3.i
bb7.i: ; preds = %bb5.i6, %bb.i1
br label %bb.i1
}