forked from OSchip/llvm-project
24 lines
718 B
LLVM
24 lines
718 B
LLVM
; RUN: opt < %s -S -loop-unroll -unroll-max-iteration-count-to-analyze=100 -unroll-dynamic-cost-savings-discount=1000 -unroll-threshold=10 -unroll-percent-dynamic-cost-saved-threshold=50 | FileCheck %s
|
|
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
|
|
|
|
define i64 @propagate_loop_phis() {
|
|
; CHECK-LABEL: @propagate_loop_phis(
|
|
; CHECK-NOT: br i1
|
|
; CHECK: ret i64 3
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv = phi i64 [ 0, %entry ], [ %inc, %loop ]
|
|
%x0 = phi i64 [ 0, %entry ], [ %x2, %loop ]
|
|
%x1 = or i64 %x0, 1
|
|
%x2 = or i64 %x1, 2
|
|
%inc = add nuw nsw i64 %iv, 1
|
|
%cond = icmp sge i64 %inc, 10
|
|
br i1 %cond, label %loop.end, label %loop
|
|
|
|
loop.end:
|
|
%x.lcssa = phi i64 [ %x2, %loop ]
|
|
ret i64 %x.lcssa
|
|
}
|