37 lines
1.2 KiB
LLVM
37 lines
1.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-- | FileCheck %s
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@X = common dso_local global i16 0 ; <ptr> [#uses=1]
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define dso_local i32 @foo(i32 %N) nounwind {
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; CHECK-LABEL: foo:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: xorl %eax, %eax
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; CHECK-NEXT: testl %edi, %edi
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; CHECK-NEXT: jle .LBB0_2
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; CHECK-NEXT: .p2align 4, 0x90
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; CHECK-NEXT: .LBB0_1: # %bb
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; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: movw %ax, X(%rip)
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; CHECK-NEXT: incl %eax
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; CHECK-NEXT: cmpl %eax, %edi
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; CHECK-NEXT: jne .LBB0_1
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; CHECK-NEXT: .LBB0_2: # %return
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; CHECK-NEXT: retq
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entry:
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%0 = icmp sgt i32 %N, 0 ; <i1> [#uses=1]
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br i1 %0, label %bb, label %return
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bb: ; preds = %bb, %entry
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%i.03 = phi i32 [ 0, %entry ], [ %indvar.next, %bb ] ; <i32> [#uses=2]
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%1 = trunc i32 %i.03 to i16 ; <i16> [#uses=1]
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store volatile i16 %1, ptr @X, align 2
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%indvar.next = add i32 %i.03, 1 ; <i32> [#uses=2]
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%exitcond = icmp eq i32 %indvar.next, %N ; <i1> [#uses=1]
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br i1 %exitcond, label %return, label %bb
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return: ; preds = %bb, %entry
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%h = phi i32 [ 0, %entry ], [ %indvar.next, %bb ]
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ret i32 %h
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}
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