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118 lines
4.2 KiB
118 lines
4.2 KiB
# RUN: llc -verify-machineinstrs -mcpu=pwr9 -mtriple powerpc64le-unknown-linux-gnu \
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# RUN: -run-pass=codegenprepare -o - %s | FileCheck %s
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# RUN: llc -verify-machineinstrs -mcpu=pwr8 -mtriple powerpc64le-unknown-linux-gnu \
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# RUN: -run-pass=codegenprepare -o - %s | FileCheck %s
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--- |
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define i32 @weighted_select1(i32 %a, i32 %b) {
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%cmp = icmp ne i32 %a, 0
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%sel = select i1 %cmp, i32 %a, i32 %b, !prof !14
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ret i32 %sel
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; If branch_weights > 99% or branch_weights < 1%, the select will be
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; converted to branch, here !14 = 99/100, !14 = 99%, so it will do nothing.
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; CHECK-LABEL: weighted_select1
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; CHECK: %cmp = icmp ne i32 %a, 0
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; CHECK-NEXT: %sel = select i1 %cmp, i32 %a, i32 %b, !prof !14
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; CHECK-NEXT: ret i32 %sel
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}
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define i32 @weighted_select2(i32 %a, i32 %b) {
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%cmp = icmp ne i32 %a, 0
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%sel = select i1 %cmp, i32 %a, i32 %b, !prof !15
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ret i32 %sel
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; If branch_weights > 99% or branch_weights < 1%, the select will be converted
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; to branch, here !15 = 100/101, !15 > 99%, so it will convert select to
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; branch.
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; CHECK-LABEL: weighted_select2
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; CHECK: %sel.frozen = freeze i32 %a
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; CHECK: %cmp = icmp ne i32 %sel.frozen, 0
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; CHECK-NEXT: br i1 %cmp, label %select.end, label %select.false, !prof !15
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; CHECK: select.false:
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; CHECK-NEXT: br label %select.end
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; CHECK: select.end:
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; CHECK-NEXT: %sel = phi i32 [ %a, %0 ], [ %b, %select.false ]
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; CHECK-NEXT: ret i32 %sel
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}
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define i32 @weighted_select3(i32 %a, i32 %b) {
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%cmp = icmp ne i32 %a, 0
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%sel = select i1 %cmp, i32 %a, i32 %b, !prof !16
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ret i32 %sel
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; If branch_weights > 99% or branch_weights < 1%, the select will be converted
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; to branch, here !16 = 1/101, !16 < 1%, so it will convert select to branch.
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; CHECK-LABEL: weighted_select3
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; CHECK: %sel.frozen = freeze i32 %a
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; CHECK: %cmp = icmp ne i32 %sel.frozen, 0
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; CHECK-NEXT: br i1 %cmp, label %select.end, label %select.false, !prof !16
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; CHECK: select.false:
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; CHECK-NEXT: br label %select.end
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; CHECK: select.end:
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; CHECK-NEXT: %sel = phi i32 [ %a, %0 ], [ %b, %select.false ]
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; CHECK-NEXT: ret i32 %sel
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}
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define i32 @unweighted_select(i32 %a, i32 %b) {
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%cmp = icmp ne i32 %a, 0
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%sel = select i1 %cmp, i32 %a, i32 %b, !prof !17
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ret i32 %sel
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; There is no weight_branch information, so it will do nothing.
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; CHECK-LABEL: unweighted_select
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; CHECK: %cmp = icmp ne i32 %a, 0
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; CHECK-NEXT: %sel = select i1 %cmp, i32 %a, i32 %b, !prof !17
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; CHECK-NEXT: ret i32 %sel
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}
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; Function Attrs: optsize
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define i32 @weighted_select_optsize(i32 %a, i32 %b) #0 {
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%cmp = icmp ne i32 %a, 0
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%sel = select i1 %cmp, i32 %a, i32 %b, !prof !15
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ret i32 %sel
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; This function has used the optsize flag, so it will do nothing.
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; CHECK-LABEL: weighted_select_optsize
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; CHECK: %cmp = icmp ne i32 %a, 0
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; CHECK-NEXT: %sel = select i1 %cmp, i32 %a, i32 %b, !prof !15
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; CHECK-NEXT: ret i32 %sel
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}
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define i32 @weighted_select_pgso(i32 %a, i32 %b) !prof !18 {
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%cmp = icmp ne i32 %a, 0
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%sel = select i1 %cmp, i32 %a, i32 %b, !prof !15
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ret i32 %sel
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; The function_entry_count of this function is 0, so it will do nothing.
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; CHECK-LABEL: weighted_select_pgso
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; CHECK: %cmp = icmp ne i32 %a, 0
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; CHECK-NEXT: %sel = select i1 %cmp, i32 %a, i32 %b, !prof !15
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; CHECK-NEXT: ret i32 %sel
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}
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attributes #0 = { optsize }
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!llvm.module.flags = !{!0}
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!0 = !{i32 1, !"ProfileSummary", !1}
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!1 = !{!2, !3, !4, !5, !6, !7, !8, !9}
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!2 = !{!"ProfileFormat", !"InstrProf"}
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!3 = !{!"TotalCount", i64 10000}
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!4 = !{!"MaxCount", i64 10}
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!5 = !{!"MaxInternalCount", i64 1}
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!6 = !{!"MaxFunctionCount", i64 1000}
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!7 = !{!"NumCounts", i64 3}
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!8 = !{!"NumFunctions", i64 3}
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!9 = !{!"DetailedSummary", !10}
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!10 = !{!11, !12, !13}
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!11 = !{i32 10000, i64 100, i32 1}
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!12 = !{i32 999000, i64 100, i32 1}
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!13 = !{i32 999999, i64 1, i32 2}
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!14 = !{!"branch_weights", i32 1, i32 99}
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!15 = !{!"branch_weights", i32 1, i32 100}
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!16 = !{!"branch_weights", i32 100, i32 1}
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!17 = !{!"branch_weights", i32 0, i32 0}
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!18 = !{!"function_entry_count", i64 0}
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...
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