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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=jump-threading -S < %s | FileCheck %s
@x = global i32 0
@y = global i32 0
declare void @f()
declare void @g()
define i32 @pre(i1 %cond, i32 %n) {
; CHECK-LABEL: @pre(
; CHECK-NEXT: br i1 [[COND:%.*]], label [[C_THREAD:%.*]], label [[C:%.*]]
; CHECK: C.thread:
; CHECK-NEXT: store i32 0, ptr @x, align 4
; CHECK-NEXT: br label [[YES:%.*]]
; CHECK: C:
; CHECK-NEXT: [[A_PR:%.*]] = load i32, ptr @y, align 4
; CHECK-NEXT: [[COND2:%.*]] = icmp eq i32 [[A_PR]], 0
; CHECK-NEXT: br i1 [[COND2]], label [[YES]], label [[NO:%.*]]
; CHECK: YES:
; CHECK-NEXT: [[A4:%.*]] = phi i32 [ 0, [[C_THREAD]] ], [ [[A_PR]], [[C]] ]
; CHECK-NEXT: call void @f()
; CHECK-NEXT: ret i32 [[A4]]
; CHECK: NO:
; CHECK-NEXT: call void @g()
; CHECK-NEXT: ret i32 1
;
br i1 %cond, label %A, label %B
A:
store i32 0, ptr @x
br label %C
B:
br label %C
C:
%ptr = phi ptr [@x, %A], [@y, %B]
%a = load i32, ptr %ptr
%cond2 = icmp eq i32 %a, 0
br i1 %cond2, label %YES, label %NO
YES:
call void @f()
ret i32 %a
NO:
call void @g()
ret i32 1
}
define i32 @pre_freeze(i1 %cond, i32 %n) {
; CHECK-LABEL: @pre_freeze(
; CHECK-NEXT: br i1 [[COND:%.*]], label [[C_THREAD:%.*]], label [[C:%.*]]
; CHECK: C.thread:
; CHECK-NEXT: store i32 0, ptr @x, align 4
; CHECK-NEXT: br label [[YES:%.*]]
; CHECK: C:
; CHECK-NEXT: [[A_PR:%.*]] = load i32, ptr @y, align 4
; CHECK-NEXT: [[COND2:%.*]] = icmp eq i32 [[A_PR]], 0
; CHECK-NEXT: [[COND2_FR:%.*]] = freeze i1 [[COND2]]
; CHECK-NEXT: br i1 [[COND2_FR]], label [[YES]], label [[NO:%.*]]
; CHECK: YES:
; CHECK-NEXT: [[A5:%.*]] = phi i32 [ 0, [[C_THREAD]] ], [ [[A_PR]], [[C]] ]
; CHECK-NEXT: call void @f()
; CHECK-NEXT: ret i32 [[A5]]
; CHECK: NO:
; CHECK-NEXT: call void @g()
; CHECK-NEXT: ret i32 1
;
br i1 %cond, label %A, label %B
A:
store i32 0, ptr @x
br label %C
B:
br label %C
C:
%ptr = phi ptr [@x, %A], [@y, %B]
%a = load i32, ptr %ptr
%cond2 = icmp eq i32 %a, 0
%cond2.fr = freeze i1 %cond2
br i1 %cond2.fr, label %YES, label %NO
YES:
call void @f()
ret i32 %a
NO:
call void @g()
ret i32 1
}
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