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84 lines
2.2 KiB
LLVM
84 lines
2.2 KiB
LLVM
; Check that a division is bypassed when appropriate only.
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; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mcpu=atom < %s | FileCheck -check-prefixes=ATOM,CHECK %s
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; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mcpu=silvermont < %s | FileCheck -check-prefixes=REST,CHECK %s
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; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mcpu=skylake < %s | FileCheck -check-prefixes=REST,CHECK %s
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; RUN: llc -profile-summary-huge-working-set-size-threshold=1 -mtriple=x86_64-unknown-linux-gnu -mcpu=skylake < %s | FileCheck -check-prefixes=HUGEWS %s
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; Verify that div32 is bypassed only for Atoms.
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define i32 @div32(i32 %a, i32 %b) {
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entry:
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; ATOM-LABEL: div32:
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; ATOM: orl %{{.*}}, [[REG:%[a-z]+]]
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; ATOM: testl $-256, [[REG]]
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; ATOM: divb
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;
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; REST-LABEL: div32:
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; REST-NOT: divb
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;
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%div = sdiv i32 %a, %b
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ret i32 %div
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}
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; Verify that div64 is always bypassed.
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define i64 @div64(i64 %a, i64 %b) {
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entry:
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; CHECK-LABEL: div64:
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; CHECK: orq %{{.*}}, [[REG:%[a-z]+]]
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; CHECK: shrq $32, [[REG]]
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; CHECK: divl
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;
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%div = sdiv i64 %a, %b
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ret i64 %div
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}
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; Verify that no extra code is generated when optimizing for size.
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define i64 @div64_optsize(i64 %a, i64 %b) optsize {
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; CHECK-LABEL: div64_optsize:
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; CHECK-NOT: divl
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; CHECK: ret
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%div = sdiv i64 %a, %b
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ret i64 %div
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}
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define i64 @div64_hugews(i64 %a, i64 %b) {
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; HUGEWS-LABEL: div64_hugews:
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; HUGEWS-NOT: divl
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; HUGEWS: ret
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%div = sdiv i64 %a, %b
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ret i64 %div
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}
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define i32 @div32_optsize(i32 %a, i32 %b) optsize {
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; CHECK-LABEL: div32_optsize:
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; CHECK-NOT: divb
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; CHECK: ret
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%div = sdiv i32 %a, %b
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ret i32 %div
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}
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define i32 @div32_minsize(i32 %a, i32 %b) minsize {
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; CHECK-LABEL: div32_minsize:
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; CHECK-NOT: divb
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; CHECK: ret
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%div = sdiv i32 %a, %b
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ret i32 %div
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}
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!llvm.module.flags = !{!1}
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!1 = !{i32 1, !"ProfileSummary", !2}
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!2 = !{!3, !4, !5, !6, !7, !8, !9, !10}
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!3 = !{!"ProfileFormat", !"InstrProf"}
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!4 = !{!"TotalCount", i64 10000}
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!5 = !{!"MaxCount", i64 1000}
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!6 = !{!"MaxInternalCount", i64 1}
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!7 = !{!"MaxFunctionCount", i64 1000}
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!8 = !{!"NumCounts", i64 3}
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!9 = !{!"NumFunctions", i64 3}
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!10 = !{!"DetailedSummary", !11}
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!11 = !{!12, !13, !14}
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!12 = !{i32 10000, i64 1000, i32 1}
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!13 = !{i32 999000, i64 1000, i32 3}
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!14 = !{i32 999999, i64 5, i32 3}
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