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57 lines
1.6 KiB
LLVM
57 lines
1.6 KiB
LLVM
; 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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; return __builtin_expect((a > b ? 1, goo(), 0);
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;
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; Function Attrs: noinline nounwind uwtable
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define i32 @foo(i32 %arg, i32 %arg1) {
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; CHECK-LABEL: i32 @foo
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bb:
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%tmp5 = icmp sgt i32 %arg, %arg1
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br i1 %tmp5, label %bb9, label %bb7
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; CHECK: br i1 %tmp5{{.*}}!prof [[WEIGHT:![0-9]+]]
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bb7: ; preds = %bb
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%tmp8 = call i32 @goo()
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br label %bb9
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bb9: ; preds = %bb7, %bb9
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%tmp10 = phi i32 [ 1, %bb ], [ %tmp8, %bb7 ]
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%tmp11 = sext i32 %tmp10 to i64
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%expect = call i64 @llvm.expect.i64(i64 %tmp11, i64 0)
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%tmp12 = trunc i64 %expect to i32
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ret i32 %tmp12
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}
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define i32 @foo2(i32 %arg, i32 %arg1) {
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bb:
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%tmp5 = icmp sgt i32 %arg, %arg1
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br i1 %tmp5, label %bb6, label %bb7
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; CHECK: br i1 %tmp5{{.*}}!prof [[WEIGHT:![0-9]+]]
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bb6: ; preds = %bb
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br label %bb9
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bb7: ; preds = %bb
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%tmp8 = call i32 @goo()
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br label %bb9
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bb9: ; preds = %bb7, %bb6
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%tmp10 = phi i32 [ 1, %bb6 ], [ %tmp8, %bb7 ]
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%tmp11 = sext i32 %tmp10 to i64
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%expect = call i64 @llvm.expect.i64(i64 %tmp11, i64 0)
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%tmp12 = trunc i64 %expect to i32
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ret i32 %tmp12
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}
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declare i32 @goo()
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declare i64 @llvm.expect.i64(i64, i64)
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!llvm.ident = !{!0}
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!0 = !{!"clang version 5.0.0 (trunk 302965)"}
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; CHECK: [[WEIGHT]] = !{!"branch_weights", i32 1, i32 2000}
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