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1; RUN: opt < %s -passes=correlated-propagation -S | FileCheck %s2 3; Removed several cases from switch.4define i32 @switch1(i32 %s) {5; CHECK-LABEL: @switch1(6; CHECK-NEXT: entry:7; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[S:%.*]], 08; CHECK-NEXT: br i1 [[CMP]], label [[NEGATIVE:%.*]], label [[OUT:%.*]]9;10entry:11 %cmp = icmp slt i32 %s, 012 br i1 %cmp, label %negative, label %out13 14negative:15; CHECK: negative:16; CHECK-NEXT: switch i32 [[S]], label [[OUT]] [17; CHECK-NEXT: i32 -2, label [[NEXT:%.*]]18; CHECK-NEXT: i32 -1, label [[NEXT]]19 switch i32 %s, label %out [20 i32 0, label %out21 i32 1, label %out22 i32 -1, label %next23 i32 -2, label %next24 i32 2, label %out25 i32 3, label %out26; CHECK-NEXT: !prof ![[MD0:[0-9]+]]27 ], !prof !{!"branch_weights", i32 99, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6}28 29out:30 %p = phi i32 [ 1, %entry ], [ -1, %negative ], [ -1, %negative ], [ -1, %negative ], [ -1, %negative ], [ -1, %negative ]31 ret i32 %p32 33next:34 %q = phi i32 [ 0, %negative ], [ 0, %negative ]35 ret i32 %q36}37 38; Removed all cases from switch.39define i32 @switch2(i32 %s) {40; CHECK-LABEL: @switch2(41; CHECK-NEXT: entry:42; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[S:%.*]], 043; CHECK-NEXT: br i1 [[CMP]], label [[POSITIVE:%.*]], label [[OUT:%.*]]44;45entry:46 %cmp = icmp sgt i32 %s, 047 br i1 %cmp, label %positive, label %out48 49positive:50 switch i32 %s, label %out [51 i32 0, label %out52 i32 -1, label %next53 i32 -2, label %next54 ], !prof !{!"branch_weights", i32 99, i32 1, i32 2, i32 3}55 56out:57 %p = phi i32 [ -1, %entry ], [ 1, %positive ], [ 1, %positive ]58 ret i32 %p59 60next:61 %q = phi i32 [ 0, %positive ], [ 0, %positive ]62 ret i32 %q63}64 65; Change switch into conditional branch.66define i32 @switch3(i32 %s) {67; CHECK-LABEL: @switch3(68;69entry:70 %cmp = icmp sgt i32 %s, 071 br i1 %cmp, label %positive, label %out72 73positive:74; CHECK: positive:75; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 %s, 176; CHECK-NEXT: br i1 [[CMP]], label [[NEXT:%.*]], label [[OUT:%.*]], !prof ![[MD1:[0-9]+]]77 switch i32 %s, label %out [78 i32 1, label %next79 i32 -1, label %next80 i32 -2, label %next81 ], !prof !{!"branch_weights", i32 99, i32 1, i32 2, i32 3}82 83out:84 %p = phi i32 [ -1, %entry ], [ 1, %positive ]85 ret i32 %p86 87next:88 %q = phi i32 [ 0, %positive ], [ 0, %positive ], [ 0, %positive ]89 ret i32 %q90}91 92; Removed all cases from switch.93define i32 @switch4(i32 %s) {94; CHECK-LABEL: @switch4(95; CHECK-NEXT: entry:96; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[S:%.*]], 097; CHECK-NEXT: br i1 [[CMP]], label [[NEGATIVE:%.*]], label [[OUT:%.*]]98;99entry:100 %cmp = icmp slt i32 %s, 0101 br i1 %cmp, label %negative, label %out102 103negative:104; CHECK: negative:105; CHECK-NEXT: br label %out106 switch i32 %s, label %out [107 i32 0, label %out108 i32 1, label %out109 i32 2, label %out110 i32 3, label %out111 ], !prof !{!"branch_weights", i32 99, i32 1, i32 2, i32 3, i32 4}112 113out:114 %p = phi i32 [ 1, %entry ], [ -1, %negative ], [ -1, %negative ], [ -1, %negative ], [ -1, %negative ], [ -1, %negative ]115 ret i32 %p116}117 118; CHECK: ![[MD0]] = !{!"branch_weights", i32 99, i32 4, i32 3}119; CHECK: ![[MD1]] = !{!"branch_weights", i32 1, i32 99}120