phi_tern.ll
1.56 KB
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; 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}