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