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;; Test that we skip unconditional PredBB when threading jumps through two
;; successive basic blocks.
; RUN: opt -S -passes='function(jump-threading)' < %s | FileCheck %s
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
define i32 @f(i32* %0) {
; CHECK-LABEL: @f
; CHECK: br i1 %good, label %pred.bb, label %pred.pred.bb
entry:
%size = call i64 @get_size(i32* %0)
%good = icmp ugt i64 %size, 3
br i1 %good, label %pred.bb, label %pred.pred.bb
; CHECK: pred.pred.bb:
; CHECK: br label %pred.bb
; CHECK: pred.bb:
; CHECK: br label %bb
; CHECK: bb:
pred.pred.bb: ; preds = %entry
call void @effect()
br label %pred.bb
pred.bb: ; preds = %pred.pred.bb, %entry
%v = load i32, i32* %0
br label %bb
bb: ; preds = %pred.bb
call void @effect1(i8* blockaddress(@f, %bb))
br i1 %good, label %cont2, label %cont1
cont1: ; preds = %bb
br i1 %good, label %exit, label %cont2
cont2: ; preds = %bb
br label %exit
exit: ; preds = %cont1, %cont2
ret i32 %v
}
declare i64 @get_size(i32*)
declare void @effect()
declare void @effect1(i8*)
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