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