2016-01-13 03:09:01 +08:00
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; RUN: llc -march=hexagon < %s | FileCheck %s
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;
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; Check that
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; {
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; r1 = r0
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; }
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; {
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; r0 = memw(r1 + #0)
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; }
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; was copy-propagated to
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; {
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; r1 = r0
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; r0 = memw(r0 + #0)
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; }
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;
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; CHECK-LABEL: LBB0_1
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; CHECK: [[DST:r[0-9]+]] = [[SRC:r[0-9]+]]
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; CHECK-DAG: memw([[SRC]]
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2016-02-27 03:40:34 +08:00
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; CHECK-NOT: memw([[DST]]
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2016-01-13 03:09:01 +08:00
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; CHECK-LABEL: LBB0_2
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target datalayout = "e-p:32:32:32-i64:64:64-i32:32:32-i16:16:16-i1:32:32-f64:64:64-f32:32:32-v64:64:64-v32:32:32-a0:0-n16:32"
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target triple = "hexagon"
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%union.t = type { %struct.t, [64 x i8] }
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%struct.t = type { [12 x i8], %struct.r*, double }
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%struct.r = type opaque
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define %union.t* @foo(%union.t* %chain) nounwind readonly {
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entry:
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%tobool = icmp eq %union.t* %chain, null
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br i1 %tobool, label %if.end, label %while.cond.preheader
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while.cond.preheader: ; preds = %entry
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br label %while.cond
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while.cond: ; preds = %while.cond.preheader, %while.cond
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%chain.addr.0 = phi %union.t* [ %0, %while.cond ], [ %chain, %while.cond.preheader ]
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%chain1 = bitcast %union.t* %chain.addr.0 to %union.t**
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%0 = load %union.t*, %union.t** %chain1, align 4, !tbaa !0
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%tobool2 = icmp eq %union.t* %0, null
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br i1 %tobool2, label %if.end.loopexit, label %while.cond
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if.end.loopexit: ; preds = %while.cond
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br label %if.end
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if.end: ; preds = %if.end.loopexit, %entry
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%chain.addr.1 = phi %union.t* [ null, %entry ], [ %chain.addr.0, %if.end.loopexit ]
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ret %union.t* %chain.addr.1
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}
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!0 = !{!"any pointer", !1}
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!1 = !{!"omnipotent char", !2}
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!2 = !{!"Simple C/C++ TBAA"}
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