; RUN: opt < %s -simplifycfg -S | FileCheck %s
define void @test1(i1 %C, i1* %BP) {
-; CHECK: @test1
+; CHECK-LABEL: @test1(
; CHECK: entry:
; CHECK-NEXT: ret void
entry:
}
define void @test2() {
-; CHECK: @test2
+; CHECK-LABEL: @test2(
; CHECK: entry:
; CHECK-NEXT: call void @test2()
; CHECK-NEXT: ret void
}
define i32 @test3(i32 %v) {
-; CHECK: @test3
+; CHECK-LABEL: @test3(
; CHECK: entry:
; CHECK-NEXT: [[CMP:%[A-Za-z0-9]+]] = icmp eq i32 %v, 2
; CHECK-NEXT: select i1 [[CMP]], i32 2, i32 1
ret i32 2
}
-; PR9450
-define i32 @test4(i32 %v) {
+
+;; We can either convert the following control-flow to a select or remove the
+;; unreachable control flow because of the undef store of null. Make sure we do
+;; the latter.
+
+define void @test5(i1 %cond, i8* %ptr) {
+
+; CHECK-LABEL: test5
; CHECK: entry:
-; CHECK-NEXT: switch i32 %v, label %T [
-; CHECK-NEXT: i32 3, label %V
-; CHECK-NEXT: i32 2, label %U
-; CHECK-NEXT: ]
+; CHECK-NOT: select
+; CHECK: store i8 2, i8* %ptr
+; CHECK: ret
entry:
- br label %SWITCH
-V:
- ret i32 7
-SWITCH:
- switch i32 %v, label %default [
- i32 1, label %T
- i32 2, label %U
- i32 3, label %V
- ]
-default:
- unreachable
-U:
- ret i32 1
-T:
- ret i32 2
+ br i1 %cond, label %bb1, label %bb3
+
+bb3:
+ br label %bb2
+
+bb1:
+ br label %bb2
+
+bb2:
+ %ptr.2 = phi i8* [ %ptr, %bb3 ], [ null, %bb1 ]
+ store i8 2, i8* %ptr.2, align 8
+ ret void
+}
+
+; CHECK-LABEL: test6
+; CHECK: entry:
+; CHECK-NOT: select
+; CHECK: store i8 2, i8* %ptr
+; CHECK: ret
+
+define void @test6(i1 %cond, i8* %ptr) {
+entry:
+ br i1 %cond, label %bb1, label %bb2
+
+bb1:
+ br label %bb2
+
+bb2:
+ %ptr.2 = phi i8* [ %ptr, %entry ], [ null, %bb1 ]
+ store i8 2, i8* %ptr.2, align 8
+ ret void
}