| ; RUN: opt -lower-expect -S -o - < %s | FileCheck %s |
| ; RUN: opt -S -passes='function(lower-expect)' < %s | FileCheck %s |
| |
| define i32 @foo(i32 %arg) #0 { |
| ; CHECK-LABEL: @foo(i32{{.*}}) |
| bb: |
| %tmp = sext i32 %arg to i64 |
| %tmp1 = call i64 @llvm.expect.i64(i64 %tmp, i64 4) |
| %tmp2 = icmp ne i64 %tmp1, 0 |
| br i1 %tmp2, label %bb3, label %bb5 |
| ; CHECK: br i1 %tmp2{{.*}}!prof [[LIKELY:![0-9]+]] |
| |
| bb3: ; preds = %bb |
| %tmp4 = call i32 (...) @bar() |
| br label %bb5 |
| |
| bb5: ; preds = %bb3, %bb |
| ret i32 1 |
| } |
| |
| define i32 @foo2(i32 %arg) #0 { |
| ; CHECK-LABEL: @foo2 |
| bb: |
| %tmp = sext i32 %arg to i64 |
| %tmp1 = call i64 @llvm.expect.i64(i64 %tmp, i64 4) |
| %tmp2 = icmp eq i64 %tmp1, 2 |
| br i1 %tmp2, label %bb3, label %bb5 |
| ; CHECK: br i1 %tmp2{{.*}}!prof [[UNLIKELY:![0-9]+]] |
| |
| bb3: ; preds = %bb |
| %tmp4 = call i32 (...) @bar() |
| br label %bb5 |
| |
| bb5: ; preds = %bb3, %bb |
| ret i32 1 |
| } |
| |
| define i32 @foo3(i32 %arg) #0 { |
| ; CHECK-LABEL: @foo3 |
| bb: |
| %tmp = sext i32 %arg to i64 |
| %tmp1 = call i64 @llvm.expect.i64(i64 %tmp, i64 4) |
| %tmp2 = icmp eq i64 %tmp1, 4 |
| br i1 %tmp2, label %bb3, label %bb5 |
| ; CHECK: br i1 %tmp2{{.*}}!prof [[LIKELY]] |
| |
| bb3: ; preds = %bb |
| %tmp4 = call i32 (...) @bar() |
| br label %bb5 |
| |
| bb5: ; preds = %bb3, %bb |
| ret i32 1 |
| } |
| |
| define i32 @foo4(i32 %arg) #0 { |
| ; CHECK-LABEL: @foo4 |
| bb: |
| %tmp = sext i32 %arg to i64 |
| %tmp1 = call i64 @llvm.expect.i64(i64 %tmp, i64 4) |
| %tmp2 = icmp ne i64 %tmp1, 2 |
| br i1 %tmp2, label %bb3, label %bb5 |
| ; CHECK: br i1 %tmp2{{.*}}!prof [[LIKELY]] |
| |
| bb3: ; preds = %bb |
| %tmp4 = call i32 (...) @bar() |
| br label %bb5 |
| |
| bb5: ; preds = %bb3, %bb |
| ret i32 1 |
| } |
| |
| define i32 @foo5(i32 %arg, i32 %arg1) #0 { |
| ; CHECK-LABEL: @foo5 |
| bb: |
| %tmp = sext i32 %arg1 to i64 |
| %tmp2 = call i64 @llvm.expect.i64(i64 %tmp, i64 4) |
| %tmp3 = sext i32 %arg to i64 |
| %tmp4 = icmp ne i64 %tmp2, %tmp3 |
| br i1 %tmp4, label %bb5, label %bb7 |
| ; CHECK-NOT: !prof |
| |
| bb5: ; preds = %bb |
| %tmp6 = call i32 (...) @bar() |
| br label %bb7 |
| |
| bb7: ; preds = %bb5, %bb |
| ret i32 1 |
| } |
| |
| declare i64 @llvm.expect.i64(i64, i64) #1 |
| |
| declare i32 @bar(...) local_unnamed_addr #0 |
| |
| attributes #0 = { nounwind uwtable } |
| attributes #1 = { nounwind readnone } |
| |
| !llvm.module.flags = !{!0} |
| !llvm.ident = !{!1} |
| |
| !0 = !{i32 1, !"wchar_size", i32 4} |
| !1 = !{!"clang version 5.0.0 (trunk 304373)"} |
| ; CHECK: [[LIKELY]] = !{!"branch_weights", i32 2000, i32 1} |
| ; CHECK: [[UNLIKELY]] = !{!"branch_weights", i32 1, i32 2000} |
| |
