1; RUN: opt -passes=lower-expect -S -o - < %s | FileCheck %s 2; RUN: opt -S -passes='function(lower-expect)' < %s | FileCheck %s 3 4define i32 @foo(i32 %arg) #0 { 5; CHECK-LABEL: @foo(i32{{.*}}) 6bb: 7 %tmp = sext i32 %arg to i64 8 %tmp1 = call i64 @llvm.expect.i64(i64 %tmp, i64 4) 9 %tmp2 = icmp ne i64 %tmp1, 0 10 br i1 %tmp2, label %bb3, label %bb5 11; CHECK: br i1 %tmp2{{.*}}!prof [[LIKELY:![0-9]+]] 12 13bb3: ; preds = %bb 14 %tmp4 = call i32 (...) @bar() 15 br label %bb5 16 17bb5: ; preds = %bb3, %bb 18 ret i32 1 19} 20 21define i32 @foo2(i32 %arg) #0 { 22; CHECK-LABEL: @foo2 23bb: 24 %tmp = sext i32 %arg to i64 25 %tmp1 = call i64 @llvm.expect.i64(i64 %tmp, i64 4) 26 %tmp2 = icmp eq i64 %tmp1, 2 27 br i1 %tmp2, label %bb3, label %bb5 28; CHECK: br i1 %tmp2{{.*}}!prof [[UNLIKELY:![0-9]+]] 29 30bb3: ; preds = %bb 31 %tmp4 = call i32 (...) @bar() 32 br label %bb5 33 34bb5: ; preds = %bb3, %bb 35 ret i32 1 36} 37 38define i32 @foo3(i32 %arg) #0 { 39; CHECK-LABEL: @foo3 40bb: 41 %tmp = sext i32 %arg to i64 42 %tmp1 = call i64 @llvm.expect.i64(i64 %tmp, i64 4) 43 %tmp2 = icmp eq i64 %tmp1, 4 44 br i1 %tmp2, label %bb3, label %bb5 45; CHECK: br i1 %tmp2{{.*}}!prof [[LIKELY]] 46 47bb3: ; preds = %bb 48 %tmp4 = call i32 (...) @bar() 49 br label %bb5 50 51bb5: ; preds = %bb3, %bb 52 ret i32 1 53} 54 55define i32 @foo4(i32 %arg) #0 { 56; CHECK-LABEL: @foo4 57bb: 58 %tmp = sext i32 %arg to i64 59 %tmp1 = call i64 @llvm.expect.i64(i64 %tmp, i64 4) 60 %tmp2 = icmp ne i64 %tmp1, 2 61 br i1 %tmp2, label %bb3, label %bb5 62; CHECK: br i1 %tmp2{{.*}}!prof [[LIKELY]] 63 64bb3: ; preds = %bb 65 %tmp4 = call i32 (...) @bar() 66 br label %bb5 67 68bb5: ; preds = %bb3, %bb 69 ret i32 1 70} 71 72define i32 @foo5(i32 %arg, i32 %arg1) #0 { 73; CHECK-LABEL: @foo5 74bb: 75 %tmp = sext i32 %arg1 to i64 76 %tmp2 = call i64 @llvm.expect.i64(i64 %tmp, i64 4) 77 %tmp3 = sext i32 %arg to i64 78 %tmp4 = icmp ne i64 %tmp2, %tmp3 79 br i1 %tmp4, label %bb5, label %bb7 80; CHECK-NOT: !prof 81 82bb5: ; preds = %bb 83 %tmp6 = call i32 (...) @bar() 84 br label %bb7 85 86bb7: ; preds = %bb5, %bb 87 ret i32 1 88} 89 90declare i64 @llvm.expect.i64(i64, i64) #1 91 92declare i32 @bar(...) local_unnamed_addr #0 93 94attributes #0 = { nounwind uwtable } 95attributes #1 = { nounwind readnone } 96 97!llvm.module.flags = !{!0} 98!llvm.ident = !{!1} 99 100!0 = !{i32 1, !"wchar_size", i32 4} 101!1 = !{!"clang version 5.0.0 (trunk 304373)"} 102; CHECK: [[LIKELY]] = !{!"branch_weights", !"expected", i32 2000, i32 1} 103; CHECK: [[UNLIKELY]] = !{!"branch_weights", !"expected", i32 1, i32 2000} 104