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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -S -passes=jump-threading | FileCheck %s
; This test used to cause jump threading to try to split an edge of a callbr.
@a = global i32 0
define i32 @c() {
; CHECK-LABEL: @c(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr @a, align 4
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i32 [[TMP0]], 0
; CHECK-NEXT: br i1 [[TOBOOL]], label [[IF_ELSE:%.*]], label [[IF_END:%.*]]
; CHECK: if.else:
; CHECK-NEXT: callbr void asm sideeffect "", "!i"()
; CHECK-NEXT: to label [[IF_THEN2:%.*]] [label %if.then2]
; CHECK: if.end:
; CHECK-NEXT: [[CALL:%.*]] = call i32 @b()
; CHECK-NEXT: [[PHITMP:%.*]] = icmp ne i32 [[CALL]], 0
; CHECK-NEXT: br i1 [[PHITMP]], label [[IF_THEN2]], label [[IF_END4:%.*]]
; CHECK: if.then2:
; CHECK-NEXT: [[CALL3:%.*]] = call i32 @b()
; CHECK-NEXT: br label [[IF_END4]]
; CHECK: if.end4:
; CHECK-NEXT: ret i32 undef
;
entry:
%0 = load i32, ptr @a
%tobool = icmp eq i32 %0, 0
br i1 %tobool, label %if.else, label %if.then
if.then: ; preds = %entry
%call = call i32 @b() #2
%phitmp = icmp ne i32 %call, 0
br label %if.end
if.else: ; preds = %entry
callbr void asm sideeffect "", "!i"() #2
to label %normal [label %if.end]
normal: ; preds = %if.else
br label %if.end
if.end: ; preds = %if.else, %normal, %if.then
%d.0 = phi i1 [ %phitmp, %if.then ], [ undef, %normal ], [ undef, %if.else ]
br i1 %d.0, label %if.then2, label %if.end4
if.then2: ; preds = %if.end
%call3 = call i32 @b()
br label %if.end4
if.end4: ; preds = %if.then2, %if.end
ret i32 undef
}
declare i32 @b()
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