1; RUN: opt < %s -simplifycfg -S | FileCheck %s 2 3define zeroext i1 @test1(i1 zeroext %flag, i32 %blksA, i32 %blksB, i32 %nblks) { 4entry: 5 br i1 %flag, label %if.then, label %if.else 6 7; CHECK-LABEL: test1 8; CHECK: add 9; CHECK: select 10; CHECK: icmp 11; CHECK-NOT: br 12if.then: 13 %cmp = icmp uge i32 %blksA, %nblks 14 %frombool1 = zext i1 %cmp to i8 15 br label %if.end 16 17if.else: 18 %add = add i32 %nblks, %blksB 19 %cmp2 = icmp ule i32 %add, %blksA 20 %frombool3 = zext i1 %cmp2 to i8 21 br label %if.end 22 23if.end: 24 %obeys.0 = phi i8 [ %frombool1, %if.then ], [ %frombool3, %if.else ] 25 %tobool4 = icmp ne i8 %obeys.0, 0 26 ret i1 %tobool4 27} 28 29define zeroext i1 @test2(i1 zeroext %flag, i32 %blksA, i32 %blksB, i32 %nblks) { 30entry: 31 br i1 %flag, label %if.then, label %if.else 32 33; CHECK-LABEL: test2 34; CHECK: add 35; CHECK: select 36; CHECK: icmp 37; CHECK-NOT: br 38if.then: 39 %cmp = icmp uge i32 %blksA, %nblks 40 %frombool1 = zext i1 %cmp to i8 41 br label %if.end 42 43if.else: 44 %add = add i32 %nblks, %blksB 45 %cmp2 = icmp uge i32 %blksA, %add 46 %frombool3 = zext i1 %cmp2 to i8 47 br label %if.end 48 49if.end: 50 %obeys.0 = phi i8 [ %frombool1, %if.then ], [ %frombool3, %if.else ] 51 %tobool4 = icmp ne i8 %obeys.0, 0 52 ret i1 %tobool4 53} 54 55declare i32 @foo(i32, i32) nounwind readnone 56 57define i32 @test3(i1 zeroext %flag, i32 %x, i32 %y) { 58entry: 59 br i1 %flag, label %if.then, label %if.else 60 61if.then: 62 %x0 = call i32 @foo(i32 %x, i32 0) nounwind readnone 63 %y0 = call i32 @foo(i32 %x, i32 1) nounwind readnone 64 br label %if.end 65 66if.else: 67 %x1 = call i32 @foo(i32 %y, i32 0) nounwind readnone 68 %y1 = call i32 @foo(i32 %y, i32 1) nounwind readnone 69 br label %if.end 70 71if.end: 72 %xx = phi i32 [ %x0, %if.then ], [ %x1, %if.else ] 73 %yy = phi i32 [ %y0, %if.then ], [ %y1, %if.else ] 74 %ret = add i32 %xx, %yy 75 ret i32 %ret 76} 77 78; CHECK-LABEL: test3 79; CHECK: select 80; CHECK: call 81; CHECK: call 82; CHECK: add 83; CHECK-NOT: br 84