derek.holloway
7502bf64a4
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51 lines
1.6 KiB
LLVM
51 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
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; RUN: llc -mtriple=x86_64-unknown-linux-gnu -o - -global-isel -global-isel-abort=1 < %s 2>&1 | FileCheck %s
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define i32 @test_01(ptr %p, i64 %len, i32 %x) {
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; CHECK-LABEL: test_01:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: movl $1, %eax
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; CHECK-NEXT: .p2align 4
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; CHECK-NEXT: .LBB0_1: # %loop
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; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: subq %rax, %rsi
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; CHECK-NEXT: setb %cl
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; CHECK-NEXT: testb $1, %cl
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; CHECK-NEXT: jne .LBB0_4
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; CHECK-NEXT: # %bb.2: # %backedge
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; CHECK-NEXT: # in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: leaq (,%rsi,4), %rcx
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; CHECK-NEXT: addq %rdi, %rcx
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; CHECK-NEXT: cmpl %edx, (%rcx)
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; CHECK-NEXT: sete %cl
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; CHECK-NEXT: testb $1, %cl
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; CHECK-NEXT: je .LBB0_1
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; CHECK-NEXT: # %bb.3: # %failure
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; CHECK-NEXT: .LBB0_4: # %exit
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; CHECK-NEXT: movl $-1, %eax
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; CHECK-NEXT: retq
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entry:
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%scevgep = getelementptr i32, ptr %p, i64 -1
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br label %loop
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loop: ; preds = %backedge, %entry
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%iv = phi i64 [ %iv.next, %backedge ], [ %len, %entry ]
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%iv.next = add i64 %iv, -1
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%cond_1 = icmp eq i64 %iv, 0
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br i1 %cond_1, label %exit, label %backedge
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backedge: ; preds = %loop
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%scevgep1 = getelementptr i32, ptr %scevgep, i64 %iv
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%loaded = load atomic i32, ptr %scevgep1 unordered, align 4
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%cond_2 = icmp eq i32 %loaded, %x
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br i1 %cond_2, label %failure, label %loop
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exit: ; preds = %loop
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ret i32 -1
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failure:
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unreachable
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}
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