forked from OSchip/llvm-project
42 lines
1.1 KiB
LLVM
42 lines
1.1 KiB
LLVM
; RUN: llc -mtriple=arm64-apple-ios -mcpu=cyclone < %s | FileCheck %s
|
|
; Do not generate redundant select in early if-converstion pass.
|
|
|
|
define i32 @foo(i32 %a, i32 %b) {
|
|
entry:
|
|
;CHECK-LABEL: foo:
|
|
;CHECK: csinc
|
|
;CHECK-NOT: csel
|
|
%sub = sub nsw i32 %b, %a
|
|
%cmp10 = icmp sgt i32 %a, 0
|
|
br i1 %cmp10, label %while.body.lr.ph, label %while.end
|
|
|
|
while.body.lr.ph:
|
|
br label %while.body
|
|
|
|
while.body:
|
|
%j.012 = phi i32 [ %sub, %while.body.lr.ph ], [ %inc, %if.then ], [ %inc, %if.else ]
|
|
%i.011 = phi i32 [ %a, %while.body.lr.ph ], [ %inc2, %if.then ], [ %dec, %if.else ]
|
|
%cmp1 = icmp slt i32 %i.011, %j.012
|
|
br i1 %cmp1, label %while.end, label %while.cond
|
|
|
|
while.cond:
|
|
%inc = add nsw i32 %j.012, 5
|
|
%cmp2 = icmp slt i32 %inc, %b
|
|
br i1 %cmp2, label %if.then, label %if.else
|
|
|
|
if.then:
|
|
%inc2 = add nsw i32 %i.011, 1
|
|
br label %while.body
|
|
|
|
if.else:
|
|
%dec = add nsw i32 %i.011, -1
|
|
br label %while.body
|
|
|
|
while.end:
|
|
%j.0.lcssa = phi i32 [ %j.012, %while.body ], [ %sub, %entry ]
|
|
%i.0.lcssa = phi i32 [ %i.011, %while.body ], [ %a, %entry ]
|
|
%add = add nsw i32 %j.0.lcssa, %i.0.lcssa
|
|
ret i32 %add
|
|
}
|
|
|