forked from OSchip/llvm-project
66 lines
2.4 KiB
LLVM
66 lines
2.4 KiB
LLVM
; 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
|
|
}
|