1; Check that a division is bypassed when appropriate only. 2; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mcpu=atom < %s | FileCheck -check-prefixes=ATOM,CHECK %s 3; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mcpu=silvermont < %s | FileCheck -check-prefixes=REST,CHECK %s 4; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mcpu=skylake < %s | FileCheck -check-prefixes=REST,CHECK %s 5; RUN: llc -profile-summary-huge-working-set-size-threshold=1 -mtriple=x86_64-unknown-linux-gnu -mcpu=skylake < %s | FileCheck -check-prefixes=HUGEWS %s 6 7; Verify that div32 is bypassed only for Atoms. 8define i32 @div32(i32 %a, i32 %b) { 9entry: 10; ATOM-LABEL: div32: 11; ATOM: orl %{{.*}}, [[REG:%[a-z]+]] 12; ATOM: testl $-256, [[REG]] 13; ATOM: divb 14; 15; REST-LABEL: div32: 16; REST-NOT: divb 17; 18 %div = sdiv i32 %a, %b 19 ret i32 %div 20} 21 22; Verify that div64 is always bypassed. 23define i64 @div64(i64 %a, i64 %b) { 24entry: 25; CHECK-LABEL: div64: 26; CHECK: orq %{{.*}}, [[REG:%[a-z]+]] 27; CHECK: shrq $32, [[REG]] 28; CHECK: divl 29; 30 %div = sdiv i64 %a, %b 31 ret i64 %div 32} 33 34 35; Verify that no extra code is generated when optimizing for size. 36 37define i64 @div64_optsize(i64 %a, i64 %b) optsize { 38; CHECK-LABEL: div64_optsize: 39; CHECK-NOT: divl 40; CHECK: ret 41 %div = sdiv i64 %a, %b 42 ret i64 %div 43} 44 45define i64 @div64_hugews(i64 %a, i64 %b) { 46; HUGEWS-LABEL: div64_hugews: 47; HUGEWS-NOT: divl 48; HUGEWS: ret 49 %div = sdiv i64 %a, %b 50 ret i64 %div 51} 52 53define i32 @div32_optsize(i32 %a, i32 %b) optsize { 54; CHECK-LABEL: div32_optsize: 55; CHECK-NOT: divb 56; CHECK: ret 57 %div = sdiv i32 %a, %b 58 ret i32 %div 59} 60 61define i32 @div32_minsize(i32 %a, i32 %b) minsize { 62; CHECK-LABEL: div32_minsize: 63; CHECK-NOT: divb 64; CHECK: ret 65 %div = sdiv i32 %a, %b 66 ret i32 %div 67} 68 69!llvm.module.flags = !{!1} 70!1 = !{i32 1, !"ProfileSummary", !2} 71!2 = !{!3, !4, !5, !6, !7, !8, !9, !10} 72!3 = !{!"ProfileFormat", !"InstrProf"} 73!4 = !{!"TotalCount", i64 10000} 74!5 = !{!"MaxCount", i64 1000} 75!6 = !{!"MaxInternalCount", i64 1} 76!7 = !{!"MaxFunctionCount", i64 1000} 77!8 = !{!"NumCounts", i64 3} 78!9 = !{!"NumFunctions", i64 3} 79!10 = !{!"DetailedSummary", !11} 80!11 = !{!12, !13, !14} 81!12 = !{i32 10000, i64 1000, i32 1} 82!13 = !{i32 999000, i64 1000, i32 3} 83!14 = !{i32 999999, i64 5, i32 3} 84