derek.holloway
7502bf64a4
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61 lines
2.2 KiB
LLVM
61 lines
2.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s
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; This test comes from PR27136
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; We should hoist loop constant invariant
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define zeroext i1 @search(i32 %needle, ptr nocapture readonly %haystack, i32 %count) {
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; CHECK-LABEL: search:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: testl %edx, %edx
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; CHECK-NEXT: jle LBB0_5
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; CHECK-NEXT: ## %bb.1: ## %for.body.preheader
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; CHECK-NEXT: movslq %edx, %rax
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; CHECK-NEXT: xorl %ecx, %ecx
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; CHECK-NEXT: .p2align 4
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; CHECK-NEXT: LBB0_2: ## %for.body
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; CHECK-NEXT: ## =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: cmpl %edi, (%rsi,%rcx,4)
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; CHECK-NEXT: je LBB0_6
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; CHECK-NEXT: ## %bb.3: ## %for.cond
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; CHECK-NEXT: ## in Loop: Header=BB0_2 Depth=1
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; CHECK-NEXT: incq %rcx
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; CHECK-NEXT: cmpq %rax, %rcx
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; CHECK-NEXT: jl LBB0_2
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; CHECK-NEXT: LBB0_5:
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; CHECK-NEXT: xorl %eax, %eax
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; CHECK-NEXT: ## kill: def $al killed $al killed $eax
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; CHECK-NEXT: retq
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; CHECK-NEXT: LBB0_6:
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; CHECK-NEXT: movb $1, %al
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; CHECK-NEXT: ## kill: def $al killed $al killed $eax
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; CHECK-NEXT: retq
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entry:
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%cmp5 = icmp sgt i32 %count, 0
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br i1 %cmp5, label %for.body.preheader, label %cleanup
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for.body.preheader: ; preds = %entry
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%0 = sext i32 %count to i64
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br label %for.body
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for.cond: ; preds = %for.body
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%cmp = icmp slt i64 %indvars.iv.next, %0
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br i1 %cmp, label %for.body, label %cleanup.loopexit
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for.body: ; preds = %for.body.preheader, %for.cond
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%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.cond ]
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%arrayidx = getelementptr inbounds i32, ptr %haystack, i64 %indvars.iv
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%1 = load i32, ptr %arrayidx, align 4
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%cmp1 = icmp eq i32 %1, %needle
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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br i1 %cmp1, label %cleanup.loopexit, label %for.cond
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cleanup.loopexit: ; preds = %for.cond, %for.body
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%.ph = phi i1 [ false, %for.cond ], [ true, %for.body ]
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br label %cleanup
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cleanup: ; preds = %cleanup.loopexit, %entry
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%2 = phi i1 [ false, %entry ], [ %.ph, %cleanup.loopexit ]
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ret i1 %2
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}
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