machine-sink.ll
2.21 KB
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; RUN: llc -march=hexagon -machine-sink-split < %s
; REQUIRES: asserts
; MachineSink should not sink an MI which is used in a non-phi instruction
; in an MBB with multiple predecessors.
target triple = "hexagon-unknown--elf"
; Function Attrs: nounwind
define void @f0() #0 {
b0:
br i1 undef, label %b1, label %b2
b1: ; preds = %b0
unreachable
b2: ; preds = %b0
%v0 = load i8*, i8** undef, align 4
%v1 = getelementptr inbounds i8, i8* %v0, i32 1
%v2 = load i8, i8* %v0, align 1, !tbaa !0
%v3 = zext i8 %v2 to i32
%v4 = shl nuw nsw i32 %v3, 8
br i1 undef, label %b3, label %b5
b3: ; preds = %b2
br i1 undef, label %b15, label %b4
b4: ; preds = %b3
br label %b5
b5: ; preds = %b4, %b2
%v5 = phi i8* [ undef, %b4 ], [ %v1, %b2 ]
%v6 = load i8, i8* %v5, align 1, !tbaa !0
%v7 = zext i8 %v6 to i32
%v8 = add nsw i32 %v7, %v4
%v9 = add nsw i32 %v8, -2
br label %b6
b6: ; preds = %b8, %b5
br i1 false, label %b7, label %b8
b7: ; preds = %b6
unreachable
b8: ; preds = %b6
br i1 undef, label %b6, label %b9
b9: ; preds = %b8
br i1 undef, label %b10, label %b14
b10: ; preds = %b9
br i1 undef, label %b11, label %b13
b11: ; preds = %b10
br i1 undef, label %b12, label %b13
b12: ; preds = %b11
unreachable
b13: ; preds = %b11, %b10
store i32 %v9, i32* undef, align 4, !tbaa !3
unreachable
b14: ; preds = %b9
unreachable
b15: ; preds = %b3
ret void
}
attributes #0 = { nounwind }
!0 = !{!1, !1, i64 0}
!1 = !{!"omnipotent char", !2, i64 0}
!2 = !{!"Simple C/C++ TBAA"}
!3 = !{!4, !4, i64 0}
!4 = !{!"int", !1, i64 0}