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