target triple = "x86_64-unknown-linux-gnu"
define i32 @test1(i32 %a, i32 %b, i32 %c) nounwind {
-; CHECK: @test1
+; CHECK-LABEL: @test1(
entry:
%tmp1 = icmp eq i32 %b, 0
br i1 %tmp1, label %bb1, label %bb3
declare i8 @llvm.cttz.i8(i8, i1)
define i8 @test2(i8 %a) {
-; CHECK: @test2
+; CHECK-LABEL: @test2(
br i1 undef, label %bb_true, label %bb_false
bb_true:
%b = tail call i8 @llvm.cttz.i8(i8 %a, i1 false)
ret i8 %c
}
+define i8* @test4(i1* %dummy, i8* %a, i8* %b) {
+; Test that we don't speculate an arbitrarily large number of unfolded constant
+; expressions.
+; CHECK-LABEL: @test4(
+
+entry:
+ %cond1 = load volatile i1* %dummy
+ br i1 %cond1, label %if, label %end
+
+if:
+ %cond2 = load volatile i1* %dummy
+ br i1 %cond2, label %then, label %end
+
+then:
+ br label %end
+
+end:
+ %x1 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 1 to i8*), %then ]
+ %x2 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 2 to i8*), %then ]
+ %x3 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 3 to i8*), %then ]
+ %x4 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 4 to i8*), %then ]
+ %x5 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 5 to i8*), %then ]
+ %x6 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 6 to i8*), %then ]
+ %x7 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 7 to i8*), %then ]
+ %x8 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 8 to i8*), %then ]
+ %x9 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 9 to i8*), %then ]
+ %x10 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 10 to i8*), %then ]
+; CHECK-NOT: select
+; CHECK: phi i8*
+; CHECK: phi i8*
+; CHECK: phi i8*
+; CHECK: phi i8*
+; CHECK: phi i8*
+; CHECK: phi i8*
+; CHECK: phi i8*
+; CHECK: phi i8*
+; CHECK: phi i8*
+; CHECK: phi i8*
+
+ ret i8* %x10
+}