phi-cycle.ll
823 Bytes
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -ipsccp -S %s | FileCheck %s
declare i1 @cond()
define i32 @test() {
; CHECK-LABEL: @test(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[C_1:%.*]] = call i1 @cond()
; CHECK-NEXT: br i1 [[C_1]], label [[LOOP]], label [[LATCH_2:%.*]]
; CHECK: latch.2:
; CHECK-NEXT: [[C_2:%.*]] = call i1 @cond()
; CHECK-NEXT: br i1 [[C_2]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: ret i32 0
;
entry:
br label %loop
loop:
%p = phi i32 [ undef, %entry ], [ 0, %latch.2 ], [ %p, %loop]
%c.1 = call i1 @cond()
br i1 %c.1, label %loop, label %latch.2
latch.2:
%c.2 = call i1 @cond()
br i1 %c.2, label %loop, label %exit
exit:
ret i32 %p
}