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<rdar://problem/16582185> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206235 91177308-0d34-0410-b5e6-96231b3b80d8
84 lines
3.4 KiB
LLVM
84 lines
3.4 KiB
LLVM
; RUN: llc %s -mcpu=core2 -o - | FileCheck %s
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; This test was failing while tracking the liveness in the register scavenger
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; during the branching folding pass. The allocation of the subregisters was
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; incorrect.
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; I.e., the faulty pattern looked like:
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; CH = movb 64
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; ECX = movl 3 <- CH was killed here.
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; CH = subb CH, ...
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;
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; This reduced test case triggers the crash before the fix, but does not
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; strictly speaking check that the resulting code is correct.
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; To check that the code is actually correct we would need to check the
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; liveness of the produced code.
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;
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; Currently, we check that after ECX = movl 3, we do not have subb CH,
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; whereas CH could have been redefine in between and that would have been
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; totally fine.
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; <rdar://problem/16582185>
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target datalayout = "e-m:o-p:32:32-f64:32:64-f80:128-n8:16:32-S128"
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target triple = "i386-apple-macosx10.9"
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%struct.A = type { %struct.B, %struct.C, %struct.D*, [1 x i8*] }
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%struct.B = type { i32, [4 x i8] }
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%struct.C = type { i128 }
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%struct.D = type { {}*, [0 x i32] }
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%union.E = type { i32 }
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; CHECK-LABEL: __XXX1:
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; CHECK: movl $3, %ecx
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; CHECK-NOT: subb %{{[a-z]+}}, %ch
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; Function Attrs: nounwind optsize ssp
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define fastcc void @__XXX1(%struct.A* %ht) #0 {
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entry:
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switch i32 undef, label %if.end196 [
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i32 1, label %sw.bb.i
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i32 3, label %sw.bb2.i
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]
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sw.bb.i: ; preds = %entry
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%call.i.i.i = tail call i32 undef(%struct.A* %ht, i8 zeroext 22, i32 undef, i32 0, %struct.D* undef)
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%bf.load.i.i = load i128* undef, align 4
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%bf.lshr.i.i = lshr i128 %bf.load.i.i, 72
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%shl1.i.i = shl nuw nsw i128 %bf.lshr.i.i, 8
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%shl.i.i = trunc i128 %shl1.i.i to i32
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br i1 undef, label %cond.false10.i.i, label %__XXX2.exit.i.i
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__XXX2.exit.i.i: ; preds = %sw.bb.i
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%extract11.i.i.i = lshr i128 %bf.load.i.i, 3
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%extract.t12.i.i.i = trunc i128 %extract11.i.i.i to i32
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%bf.cast7.i.i.i = and i32 %extract.t12.i.i.i, 3
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%arrayidx.i.i.i = getelementptr inbounds %struct.A* %ht, i32 0, i32 3, i32 %bf.cast7.i.i.i
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br label %cond.end12.i.i
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cond.false10.i.i: ; preds = %sw.bb.i
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%arrayidx.i6.i.i = getelementptr inbounds %struct.A* %ht, i32 0, i32 3, i32 0
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br label %cond.end12.i.i
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cond.end12.i.i: ; preds = %cond.false10.i.i, %__XXX2.exit.i.i
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%.sink.in.i.i = phi i8** [ %arrayidx.i.i.i, %__XXX2.exit.i.i ], [ %arrayidx.i6.i.i, %cond.false10.i.i ]
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%.sink.i.i = load i8** %.sink.in.i.i, align 4
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%tmp = bitcast i8* %.sink.i.i to %union.E*
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br i1 undef, label %for.body.i.i, label %if.end196
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for.body.i.i: ; preds = %for.body.i.i, %cond.end12.i.i
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%weak.i.i = getelementptr inbounds %union.E* %tmp, i32 undef, i32 0
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%tmp1 = load i32* %weak.i.i, align 4
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%cmp36.i.i = icmp ne i32 %tmp1, %shl.i.i
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%or.cond = and i1 %cmp36.i.i, false
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br i1 %or.cond, label %for.body.i.i, label %if.end196
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sw.bb2.i: ; preds = %entry
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%bf.lshr.i85.i = lshr i128 undef, 72
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br i1 undef, label %if.end196, label %__XXX2.exit.i95.i
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__XXX2.exit.i95.i: ; preds = %sw.bb2.i
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%extract11.i.i91.i = lshr i128 undef, 3
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br label %if.end196
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if.end196: ; preds = %__XXX2.exit.i95.i, %sw.bb2.i, %for.body.i.i, %cond.end12.i.i, %entry
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ret void
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}
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attributes #0 = { nounwind optsize ssp "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" }
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