; Mostly theoretical since instruction combining simplifies all selects of
; booleans where at least one operand is true/false/undef.
-; CHECK: @test_br
+; CHECK-LABEL: @test_br(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 %cond, label %L1,
define void @test_br(i1 %cond, i1 %value) nounwind {
; Jump threading of switch with select as condition.
-; CHECK: @test_switch
+; CHECK-LABEL: @test_switch(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 %cond, label %L1,
define void @test_switch(i1 %cond, i8 %value) nounwind {
; Jump threading of indirectbr with select as address.
-; CHECK: @test_indirectbr
+; CHECK-LABEL: @test_indirectbr(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 %cond, label %L1, label %L3
define void @test_indirectbr(i1 %cond, i8* %address) nounwind {
}
+; Jump threading of indirectbr with select as address. Test increased
+; duplication threshold for cases where indirectbr is being threaded
+; through.
+
+; CHECK-LABEL: @test_indirectbr_thresh(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: br i1 %cond, label %L1, label %L3
+; CHECK-NOT: indirectbr
+define void @test_indirectbr_thresh(i1 %cond, i8* %address) nounwind {
+entry:
+ br i1 %cond, label %L0, label %L3
+L0:
+ %indirect.goto.dest = select i1 %cond, i8* blockaddress(@test_indirectbr_thresh, %L1), i8* %address
+ call void @quux()
+ call void @quux()
+ call void @quux()
+ indirectbr i8* %indirect.goto.dest, [label %L1, label %L2, label %L3]
+
+L1:
+ call void @foo()
+ ret void
+L2:
+ call void @bar()
+ ret void
+L3:
+ call void @baz()
+ ret void
+}
+
+
; A more complicated case: the condition is a select based on a comparison.
-; CHECK: @test_switch_cmp
+; CHECK-LABEL: @test_switch_cmp(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 %cond, label %L0, label %[[THREADED:[A-Za-z.0-9]+]]
; CHECK: [[THREADED]]:
call void @quux()
br label %L0
}
+
+; Make sure the edge value of %0 from entry to L2 includes 0 and L3 is
+; reachable.
+; CHECK: test_switch_default
+; CHECK: entry:
+; CHECK: load
+; CHECK: icmp
+; CHECK: [[THREADED:[A-Za-z.0-9]+]]:
+; CHECK: store
+; CHECK: br
+; CHECK: L2:
+; CHECK: icmp
+define void @test_switch_default(i32* nocapture %status) nounwind {
+entry:
+ %0 = load i32, i32* %status, align 4
+ switch i32 %0, label %L2 [
+ i32 5061, label %L1
+ i32 0, label %L2
+ ]
+
+L1:
+ store i32 10025, i32* %status, align 4
+ br label %L2
+
+L2:
+ %1 = load i32, i32* %status, align 4
+ %cmp57.i = icmp eq i32 %1, 0
+ br i1 %cmp57.i, label %L3, label %L4
+
+L3:
+ store i32 10000, i32* %status, align 4
+ br label %L4
+
+L4:
+ ret void
+}
+
+define void @unfold1(double %x, double %y) nounwind {
+entry:
+ %sub = fsub double %x, %y
+ %cmp = fcmp ogt double %sub, 1.000000e+01
+ br i1 %cmp, label %cond.end4, label %cond.false
+
+cond.false: ; preds = %entry
+ %add = fadd double %x, %y
+ %cmp1 = fcmp ogt double %add, 1.000000e+01
+ %add. = select i1 %cmp1, double %add, double 0.000000e+00
+ br label %cond.end4
+
+cond.end4: ; preds = %entry, %cond.false
+ %cond5 = phi double [ %add., %cond.false ], [ %sub, %entry ]
+ %cmp6 = fcmp oeq double %cond5, 0.000000e+00
+ br i1 %cmp6, label %if.then, label %if.end
+
+if.then: ; preds = %cond.end4
+ call void @foo()
+ br label %if.end
+
+if.end: ; preds = %if.then, %cond.end4
+ ret void
+
+; CHECK-LABEL: @unfold1
+; CHECK: br i1 %cmp, label %cond.end4, label %cond.false
+; CHECK: br i1 %cmp1, label %cond.end4, label %if.then
+; CHECK: br i1 %cmp6, label %if.then, label %if.end
+; CHECK: br label %if.end
+}
+
+
+define void @unfold2(i32 %x, i32 %y) nounwind {
+entry:
+ %sub = sub nsw i32 %x, %y
+ %cmp = icmp sgt i32 %sub, 10
+ br i1 %cmp, label %cond.end4, label %cond.false
+
+cond.false: ; preds = %entry
+ %add = add nsw i32 %x, %y
+ %cmp1 = icmp sgt i32 %add, 10
+ %add. = select i1 %cmp1, i32 0, i32 %add
+ br label %cond.end4
+
+cond.end4: ; preds = %entry, %cond.false
+ %cond5 = phi i32 [ %add., %cond.false ], [ %sub, %entry ]
+ %cmp6 = icmp eq i32 %cond5, 0
+ br i1 %cmp6, label %if.then, label %if.end
+
+if.then: ; preds = %cond.end4
+ call void @foo()
+ br label %if.end
+
+if.end: ; preds = %if.then, %cond.end4
+ ret void
+
+; CHECK-LABEL: @unfold2
+; CHECK: br i1 %cmp, label %if.end, label %cond.false
+; CHECK: br i1 %cmp1, label %if.then, label %cond.end4
+; CHECK: br i1 %cmp6, label %if.then, label %if.end
+; CHECK: br label %if.end
+}
+
+
+define i32 @unfold3(i32 %u, i32 %v, i32 %w, i32 %x, i32 %y, i32 %z, i32 %j) nounwind {
+entry:
+ %add3 = add nsw i32 %j, 2
+ %cmp.i = icmp slt i32 %u, %v
+ br i1 %cmp.i, label %.exit, label %cond.false.i
+
+cond.false.i: ; preds = %entry
+ %cmp4.i = icmp sgt i32 %u, %v
+ br i1 %cmp4.i, label %.exit, label %cond.false.6.i
+
+cond.false.6.i: ; preds = %cond.false.i
+ %cmp8.i = icmp slt i32 %w, %x
+ br i1 %cmp8.i, label %.exit, label %cond.false.10.i
+
+cond.false.10.i: ; preds = %cond.false.6.i
+ %cmp13.i = icmp sgt i32 %w, %x
+ br i1 %cmp13.i, label %.exit, label %cond.false.15.i
+
+cond.false.15.i: ; preds = %cond.false.10.i
+ %phitmp = icmp sge i32 %y, %z
+ br label %.exit
+
+.exit: ; preds = %entry, %cond.false.i, %cond.false.6.i, %cond.false.10.i, %cond.false.15.i
+ %cond23.i = phi i1 [ false, %entry ], [ true, %cond.false.i ], [ false, %cond.false.6.i ], [ %phitmp, %cond.false.15.i ], [ true, %cond.false.10.i ]
+ %j.add3 = select i1 %cond23.i, i32 %j, i32 %add3
+ ret i32 %j.add3
+
+; CHECK-LABEL: @unfold3
+; CHECK: br i1 %cmp.i, label %.exit.thread2, label %cond.false.i
+; CHECK: br i1 %cmp4.i, label %.exit.thread, label %cond.false.6.i
+; CHECK: br i1 %cmp8.i, label %.exit.thread2, label %cond.false.10.i
+; CHECK: br i1 %cmp13.i, label %.exit.thread, label %.exit
+; CHECK: br i1 %phitmp, label %.exit.thread, label %.exit.thread2
+; CHECK: br label %.exit.thread2
+}
projects / oota-llvm.git / blobdiff