forked from OSchip/llvm-project
51 lines
1.8 KiB
LLVM
51 lines
1.8 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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; LSR previously eliminated the sitofp by introducing an induction
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; variable which stepped by a bogus ((double)UINT32_C(-1)). It's theoretically
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; possible to eliminate the sitofp using a proper -1.0 step though; this
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; test should be changed if that is done.
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define void @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: pushq %rbp
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; CHECK-NEXT: pushq %rbx
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; CHECK-NEXT: pushq %rax
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; CHECK-NEXT: testl %edi, %edi
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; CHECK-NEXT: jns .LBB0_3
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; CHECK-NEXT: # %bb.1: # %bb.preheader
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; CHECK-NEXT: movl %edi, %ebx
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; CHECK-NEXT: xorl %ebp, %ebp
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; CHECK-NEXT: .p2align 4, 0x90
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; CHECK-NEXT: .LBB0_2: # %bb
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; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: xorps %xmm0, %xmm0
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; CHECK-NEXT: cvtsi2sd %ebp, %xmm0
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; CHECK-NEXT: callq bar
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; CHECK-NEXT: decl %ebp
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; CHECK-NEXT: cmpl %ebp, %ebx
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; CHECK-NEXT: jne .LBB0_2
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; CHECK-NEXT: .LBB0_3: # %return
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; CHECK-NEXT: addq $8, %rsp
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; CHECK-NEXT: popq %rbx
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; CHECK-NEXT: popq %rbp
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; CHECK-NEXT: retq
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entry:
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%0 = icmp slt 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 ], [ %2, %bb ] ; <i32> [#uses=2]
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%1 = sitofp i32 %i.03 to double ; <double> [#uses=1]
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tail call void @bar(double %1) nounwind
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%2 = add nsw i32 %i.03, -1 ; <i32> [#uses=2]
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%exitcond = icmp eq i32 %2, %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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ret void
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}
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declare void @bar(double)
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