53 lines · plain
1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py2; RUN: llc < %s -mtriple=x86_64-- | FileCheck %s3 4; LSR previously eliminated the sitofp by introducing an induction5; variable which stepped by a bogus ((double)UINT32_C(-1)). It's theoretically6; possible to eliminate the sitofp using a proper -1.0 step though; this7; test should be changed if that is done.8 9define void @foo(i32 %N) nounwind {10; CHECK-LABEL: foo:11; CHECK: # %bb.0: # %entry12; CHECK-NEXT: testl %edi, %edi13; CHECK-NEXT: js .LBB0_114; CHECK-NEXT: # %bb.4: # %return15; CHECK-NEXT: retq16; CHECK-NEXT: .LBB0_1: # %bb.preheader17; CHECK-NEXT: pushq %rbp18; CHECK-NEXT: pushq %rbx19; CHECK-NEXT: pushq %rax20; CHECK-NEXT: movl %edi, %ebx21; CHECK-NEXT: xorl %ebp, %ebp22; CHECK-NEXT: .p2align 423; CHECK-NEXT: .LBB0_2: # %bb24; CHECK-NEXT: # =>This Inner Loop Header: Depth=125; CHECK-NEXT: xorps %xmm0, %xmm026; CHECK-NEXT: cvtsi2sd %ebp, %xmm027; CHECK-NEXT: callq bar@PLT28; CHECK-NEXT: decl %ebp29; CHECK-NEXT: cmpl %ebp, %ebx30; CHECK-NEXT: jne .LBB0_231; CHECK-NEXT: # %bb.3:32; CHECK-NEXT: addq $8, %rsp33; CHECK-NEXT: popq %rbx34; CHECK-NEXT: popq %rbp35; CHECK-NEXT: retq36entry:37 %0 = icmp slt i32 %N, 0 ; <i1> [#uses=1]38 br i1 %0, label %bb, label %return39 40bb: ; preds = %bb, %entry41 %i.03 = phi i32 [ 0, %entry ], [ %2, %bb ] ; <i32> [#uses=2]42 %1 = sitofp i32 %i.03 to double ; <double> [#uses=1]43 tail call void @bar(double %1) nounwind44 %2 = add nsw i32 %i.03, -1 ; <i32> [#uses=2]45 %exitcond = icmp eq i32 %2, %N ; <i1> [#uses=1]46 br i1 %exitcond, label %return, label %bb47 48return: ; preds = %bb, %entry49 ret void50}51 52declare void @bar(double)53