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; RUN: opt -S < %s -jump-threading | FileCheck %s
; Keep block addresses alive.
@addresses = constant [4 x i8*] [
i8* blockaddress(@test1, %L1), i8* blockaddress(@test1, %L2),
i8* blockaddress(@test2, %L1), i8* blockaddress(@test2, %L2)
]
declare void @bar()
declare void @baz()
; Check basic jump threading for indirectbr instructions.
; CHECK: void @test1
; CHECK: br i1 %tobool, label %L1, label %indirectgoto
; CHECK-NOT: if.else:
; CHECK: L1:
; CHECK: indirectbr i8* %address, [label %L1, label %L2]
define void @test1(i32 %i, i8* %address) nounwind {
entry:
%rem = srem i32 %i, 2
%tobool = icmp ne i32 %rem, 0
br i1 %tobool, label %indirectgoto, label %if.else
if.else: ; preds = %entry
br label %indirectgoto
L1: ; preds = %indirectgoto
call void @bar()
ret void
L2: ; preds = %indirectgoto
call void @baz()
ret void
indirectgoto: ; preds = %if.else, %entry
%indirect.goto.dest = phi i8* [ %address, %if.else ], [ blockaddress(@test1, %L1), %entry ]
indirectbr i8* %indirect.goto.dest, [label %L1, label %L2]
}
; Check constant folding of indirectbr
; CHECK: void @test2
; CHECK-NEXT: :
; CHECK-NEXT: call void @bar
; CHECK-NEXT: ret void
define void @test2() nounwind {
entry:
indirectbr i8* blockaddress(@test2, %L1), [label %L1, label %L2]
L1: ; preds = %indirectgoto
call void @bar()
ret void
L2: ; preds = %indirectgoto
call void @baz()
ret void
}
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