thread-two-bbs4.ll
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; RUN: opt < %s -jump-threading -S -verify | 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"
; Verify that we do *not* thread any edge. We used to evaluate
; constant expressions like:
;
; icmp ugt i8* null, inttoptr (i64 4 to i8*)
;
; as "true", causing jump threading to a wrong destination.
define void @foo(i8* %arg1, i8* %arg2) {
; CHECK-LABEL: @foo
; CHECK-NOT: bb_{{[^ ]*}}.thread:
entry:
%cmp1 = icmp eq i8* %arg1, null
br i1 %cmp1, label %bb_bar1, label %bb_end
bb_bar1:
call void @bar(i32 1)
br label %bb_end
bb_end:
%cmp2 = icmp ne i8* %arg2, null
br i1 %cmp2, label %bb_cont, label %bb_bar2
bb_bar2:
call void @bar(i32 2)
br label %bb_exit
bb_cont:
%cmp3 = icmp ule i8* %arg1, inttoptr (i64 4 to i8*)
br i1 %cmp3, label %bb_exit, label %bb_bar3
bb_bar3:
call void @bar(i32 3)
br label %bb_exit
bb_exit:
ret void
}
declare void @bar(i32)