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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s
; This test comes from PR27136
; We should hoist loop constant invariant
define zeroext i1 @search(i32 %needle, i32* nocapture readonly %haystack, i32 %count) {
; CHECK-LABEL: search:
; CHECK: ## BB#0: ## %entry
; CHECK-NEXT: testl %edx, %edx
; CHECK-NEXT: jle LBB0_1
; CHECK-NEXT: ## BB#4: ## %for.body.preheader
; CHECK-NEXT: movslq %edx, %rax
; CHECK-NEXT: xorl %ecx, %ecx
; CHECK-NEXT: .p2align 4, 0x90
; CHECK-NEXT: LBB0_5: ## %for.body
; CHECK-NEXT: ## =>This Inner Loop Header: Depth=1
; CHECK-NEXT: cmpl %edi, (%rsi,%rcx,4)
; CHECK-NEXT: je LBB0_6
; CHECK-NEXT: ## BB#2: ## %for.cond
; CHECK-NEXT: ## in Loop: Header=BB0_5 Depth=1
; CHECK-NEXT: incq %rcx
; CHECK-NEXT: cmpq %rax, %rcx
; CHECK-NEXT: jl LBB0_5
; ### FIXME: BB#3 and LBB0_1 should be merged
; CHECK-NEXT: ## BB#3:
; CHECK-NEXT: xorl %eax, %eax
; CHECK-NEXT: ## kill: %AL<def> %AL<kill> %EAX<kill>
; CHECK-NEXT: retq
; CHECK-NEXT: LBB0_1:
; CHECK-NEXT: xorl %eax, %eax
; CHECK-NEXT: ## kill: %AL<def> %AL<kill> %EAX<kill>
; CHECK-NEXT: retq
; CHECK-NEXT: LBB0_6:
; CHECK-NEXT: movb $1, %al
; CHECK-NEXT: ## kill: %AL<def> %AL<kill> %EAX<kill>
; CHECK-NEXT: retq
entry:
%cmp5 = icmp sgt i32 %count, 0
br i1 %cmp5, label %for.body.preheader, label %cleanup
for.body.preheader: ; preds = %entry
%0 = sext i32 %count to i64
br label %for.body
for.cond: ; preds = %for.body
%cmp = icmp slt i64 %indvars.iv.next, %0
br i1 %cmp, label %for.body, label %cleanup.loopexit
for.body: ; preds = %for.body.preheader, %for.cond
%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.cond ]
%arrayidx = getelementptr inbounds i32, i32* %haystack, i64 %indvars.iv
%1 = load i32, i32* %arrayidx, align 4
%cmp1 = icmp eq i32 %1, %needle
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
br i1 %cmp1, label %cleanup.loopexit, label %for.cond
cleanup.loopexit: ; preds = %for.cond, %for.body
%.ph = phi i1 [ false, %for.cond ], [ true, %for.body ]
br label %cleanup
cleanup: ; preds = %cleanup.loopexit, %entry
%2 = phi i1 [ false, %entry ], [ %.ph, %cleanup.loopexit ]
ret i1 %2
}
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