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; RUN: llc -march=hexagon -disable-copyprop < %s | FileCheck %s
; Disable MachineCopyPropagation to expose this opportunity to RDF copy.
;
; Check that
; {
; r1 = r0
; }
; {
; r0 = memw(r1 + #0)
; }
; was copy-propagated to
; {
; r1 = r0
; r0 = memw(r0 + #0)
; }
;
; CHECK-LABEL: LBB0_1
; CHECK: [[DST:r[0-9]+]] = [[SRC:r[0-9]+]]
; CHECK-DAG: memw([[SRC]]
; CHECK-NOT: memw([[DST]]
; CHECK: %if.end
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"
target triple = "hexagon"
%union.t = type { %struct.t, [64 x i8] }
%struct.t = type { [12 x i8], ptr, double }
%struct.r = type opaque
define ptr @foo(ptr %chain) nounwind readonly #0 {
entry:
%tobool = icmp eq ptr %chain, null
br i1 %tobool, label %if.end, label %while.cond.preheader
while.cond.preheader: ; preds = %entry
br label %while.cond
while.cond: ; preds = %while.cond.preheader, %while.cond
%chain.addr.0 = phi ptr [ %0, %while.cond ], [ %chain, %while.cond.preheader ]
%0 = load ptr, ptr %chain.addr.0, align 4, !tbaa !0
%tobool2 = icmp eq ptr %0, null
br i1 %tobool2, label %if.end.loopexit, label %while.cond
if.end.loopexit: ; preds = %while.cond
br label %if.end
if.end: ; preds = %if.end.loopexit, %entry
%chain.addr.1 = phi ptr [ null, %entry ], [ %chain.addr.0, %if.end.loopexit ]
ret ptr %chain.addr.1
}
attributes #0 = { nounwind "target-features"="-packets" }
!0 = !{!"any pointer", !1}
!1 = !{!"omnipotent char", !2}
!2 = !{!"Simple C/C++ TBAA"}
|
