28 lines
1.0 KiB
LLVM
28 lines
1.0 KiB
LLVM
; REQUIRES: asserts
|
|
; RUN: opt < %s -loop-unswitch -disable-output -stats 2>&1| FileCheck %s
|
|
; RUN: opt < %s -loop-unswitch -enable-mssa-loop-dependency=true -verify-memoryssa -disable-output -stats 2>&1| FileCheck %s
|
|
|
|
; Check the select statement in the loop will be unswitched.
|
|
; CHECK: 1 loop-unswitch - Number of selects unswitched
|
|
define i32 @test(i1 zeroext %x, i32 %a) local_unnamed_addr #0 {
|
|
entry:
|
|
br label %while.cond
|
|
|
|
while.cond: ; preds = %while.body, %entry
|
|
%i.0 = phi i32 [ 0, %entry ], [ %inc, %while.body ]
|
|
%s.0 = phi i32 [ %a, %entry ], [ %add, %while.body ]
|
|
%cmp = icmp slt i32 %i.0, 10000
|
|
br i1 %cmp, label %while.body, label %while.end
|
|
|
|
while.body: ; preds = %while.cond
|
|
%cond = select i1 %x, i32 %a, i32 %i.0
|
|
%add = add nsw i32 %s.0, %cond
|
|
%inc = add nsw i32 %i.0, 1
|
|
br label %while.cond
|
|
|
|
while.end: ; preds = %while.cond
|
|
%s.0.lcssa = phi i32 [ %s.0, %while.cond ]
|
|
ret i32 %s.0.lcssa
|
|
}
|
|
|