PGO branch weight: update edge weights in IfConverter.

[oota-llvm.git] / test / CodeGen / ARM / ifcvt-branch-weight.ll

diff --git a/test/CodeGen/ARM/ifcvt-branch-weight.ll b/test/CodeGen/ARM/ifcvt-branch-weight.ll
new file mode 100644 (file)
index 0000000..cd8a561
--- /dev/null
+++ b/test/CodeGen/ARM/ifcvt-branch-weight.ll
@@ -0,0 +1,42 @@
+; RUN: llc < %s -mtriple=thumbv8 -print-machineinstrs=if-converter -o /dev/null 2>&1 | FileCheck %s
+
+%struct.S = type { i8* (i8*)*, [1 x i8] }
+define internal zeroext i8 @bar(%struct.S* %x, %struct.S* nocapture %y) nounwind readonly {
+entry:
+  %0 = getelementptr inbounds %struct.S* %x, i32 0, i32 1, i32 0
+  %1 = load i8* %0, align 1
+  %2 = zext i8 %1 to i32
+  %3 = and i32 %2, 112
+  %4 = icmp eq i32 %3, 0
+  br i1 %4, label %return, label %bb
+
+bb:
+  %5 = getelementptr inbounds %struct.S* %y, i32 0, i32 1, i32 0
+  %6 = load i8* %5, align 1
+  %7 = zext i8 %6 to i32
+  %8 = and i32 %7, 112
+  %9 = icmp eq i32 %8, 0
+  br i1 %9, label %return, label %bb2
+
+; CHECK: BB#2: derived from LLVM BB %bb2
+; CHECK: Successors according to CFG: BB#3(192) BB#4(192)
+
+bb2:
+  %v10 = icmp eq i32 %3, 16
+  br i1 %v10, label %bb4, label %bb3, !prof !0
+
+bb3:
+  %v11 = icmp eq i32 %8, 16
+  br i1 %v11, label %bb4, label %return, !prof !1
+
+bb4:
+  %v12 = ptrtoint %struct.S* %x to i32
+  %phitmp = trunc i32 %v12 to i8
+  ret i8 %phitmp
+
+return:
+  ret i8 1
+}
+
+!0 = metadata !{metadata !"branch_weights", i32 4, i32 12}
+!1 = metadata !{metadata !"branch_weights", i32 8, i32 16}