| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s -mtriple=x86_64-- | FileCheck %s |
| |
| ; LSR previously eliminated the sitofp by introducing an induction |
| ; variable which stepped by a bogus ((double)UINT32_C(-1)). It's theoretically |
| ; possible to eliminate the sitofp using a proper -1.0 step though; this |
| ; test should be changed if that is done. |
| |
| define void @foo(i32 %N) nounwind { |
| ; CHECK-LABEL: foo: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: pushq %rbp |
| ; CHECK-NEXT: pushq %rbx |
| ; CHECK-NEXT: pushq %rax |
| ; CHECK-NEXT: testl %edi, %edi |
| ; CHECK-NEXT: jns .LBB0_3 |
| ; CHECK-NEXT: # %bb.1: # %bb.preheader |
| ; CHECK-NEXT: movl %edi, %ebx |
| ; CHECK-NEXT: xorl %ebp, %ebp |
| ; CHECK-NEXT: .p2align 4, 0x90 |
| ; CHECK-NEXT: .LBB0_2: # %bb |
| ; CHECK-NEXT: # =>This Inner Loop Header: Depth=1 |
| ; CHECK-NEXT: xorps %xmm0, %xmm0 |
| ; CHECK-NEXT: cvtsi2sd %ebp, %xmm0 |
| ; CHECK-NEXT: callq bar |
| ; CHECK-NEXT: decl %ebp |
| ; CHECK-NEXT: cmpl %ebp, %ebx |
| ; CHECK-NEXT: jne .LBB0_2 |
| ; CHECK-NEXT: .LBB0_3: # %return |
| ; CHECK-NEXT: addq $8, %rsp |
| ; CHECK-NEXT: popq %rbx |
| ; CHECK-NEXT: popq %rbp |
| ; CHECK-NEXT: retq |
| entry: |
| %0 = icmp slt i32 %N, 0 ; <i1> [#uses=1] |
| br i1 %0, label %bb, label %return |
| |
| bb: ; preds = %bb, %entry |
| %i.03 = phi i32 [ 0, %entry ], [ %2, %bb ] ; <i32> [#uses=2] |
| %1 = sitofp i32 %i.03 to double ; <double> [#uses=1] |
| tail call void @bar(double %1) nounwind |
| %2 = add nsw i32 %i.03, -1 ; <i32> [#uses=2] |
| %exitcond = icmp eq i32 %2, %N ; <i1> [#uses=1] |
| br i1 %exitcond, label %return, label %bb |
| |
| return: ; preds = %bb, %entry |
| ret void |
| } |
| |
| declare void @bar(double) |
