; RUN: opt -S < %s -simplifycfg -simplifycfg-merge-cond-stores=true -simplifycfg-merge-cond-stores-aggressively=false -phi-node-folding-threshold=2 | FileCheck %s target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64" target triple = "armv7--linux-gnueabihf" ; This is a bit reversal that has been run through the early optimizer (-mem2reg -gvn -instcombine). ; There should be no additional PHIs created at all. The store should be on its own in a predicated ; block and there should be no PHIs. ; CHECK-LABEL: @f ; Exactly 15 phis, as there are 15 in the original test case. ; CHECK: select ; CHECK: select ; CHECK: select ; CHECK: select ; CHECK: select ; CHECK: select ; CHECK: select ; CHECK: select ; CHECK: select ; CHECK: select ; CHECK: select ; CHECK: select ; CHECK: select ; CHECK: select ; CHECK: select ; CHECK: select ; CHECK-NOT: select ; CHECK: br i1 {{.*}}, label %[[L:.*]], label %[[R:.*]] ; CHECK: [[L]]: ; preds = ; CHECK-NEXT: store ; CHECK-NEXT: br label %[[R]] ; CHECK: [[R]]: ; preds = ; CHECK-NEXT: ret i32 0 define i32 @f(i32* %b) { entry: %0 = load i32, i32* %b, align 4 %and = and i32 %0, 1 %tobool = icmp eq i32 %and, 0 br i1 %tobool, label %if.end, label %if.then if.then: ; preds = %entry %or = or i32 %0, -2147483648 store i32 %or, i32* %b, align 4 br label %if.end if.end: ; preds = %entry, %if.then %1 = phi i32 [ %0, %entry ], [ %or, %if.then ] %and1 = and i32 %1, 2 %tobool2 = icmp eq i32 %and1, 0 br i1 %tobool2, label %if.end5, label %if.then3 if.then3: ; preds = %if.end %or4 = or i32 %1, 1073741824 store i32 %or4, i32* %b, align 4 br label %if.end5 if.end5: ; preds = %if.end, %if.then3 %2 = phi i32 [ %1, %if.end ], [ %or4, %if.then3 ] %and6 = and i32 %2, 4 %tobool7 = icmp eq i32 %and6, 0 br i1 %tobool7, label %if.end10, label %if.then8 if.then8: ; preds = %if.end5 %or9 = or i32 %2, 536870912 store i32 %or9, i32* %b, align 4 br label %if.end10 if.end10: ; preds = %if.end5, %if.then8 %3 = phi i32 [ %2, %if.end5 ], [ %or9, %if.then8 ] %and11 = and i32 %3, 8 %tobool12 = icmp eq i32 %and11, 0 br i1 %tobool12, label %if.end15, label %if.then13 if.then13: ; preds = %if.end10 %or14 = or i32 %3, 268435456 store i32 %or14, i32* %b, align 4 br label %if.end15 if.end15: ; preds = %if.end10, %if.then13 %4 = phi i32 [ %3, %if.end10 ], [ %or14, %if.then13 ] %and16 = and i32 %4, 16 %tobool17 = icmp eq i32 %and16, 0 br i1 %tobool17, label %if.end20, label %if.then18 if.then18: ; preds = %if.end15 %or19 = or i32 %4, 134217728 store i32 %or19, i32* %b, align 4 br label %if.end20 if.end20: ; preds = %if.end15, %if.then18 %5 = phi i32 [ %4, %if.end15 ], [ %or19, %if.then18 ] %and21 = and i32 %5, 32 %tobool22 = icmp eq i32 %and21, 0 br i1 %tobool22, label %if.end25, label %if.then23 if.then23: ; preds = %if.end20 %or24 = or i32 %5, 67108864 store i32 %or24, i32* %b, align 4 br label %if.end25 if.end25: ; preds = %if.end20, %if.then23 %6 = phi i32 [ %5, %if.end20 ], [ %or24, %if.then23 ] %and26 = and i32 %6, 64 %tobool27 = icmp eq i32 %and26, 0 br i1 %tobool27, label %if.end30, label %if.then28 if.then28: ; preds = %if.end25 %or29 = or i32 %6, 33554432 store i32 %or29, i32* %b, align 4 br label %if.end30 if.end30: ; preds = %if.end25, %if.then28 %7 = phi i32 [ %6, %if.end25 ], [ %or29, %if.then28 ] %and31 = and i32 %7, 256 %tobool32 = icmp eq i32 %and31, 0 br i1 %tobool32, label %if.end35, label %if.then33 if.then33: ; preds = %if.end30 %or34 = or i32 %7, 8388608 store i32 %or34, i32* %b, align 4 br label %if.end35 if.end35: ; preds = %if.end30, %if.then33 %8 = phi i32 [ %7, %if.end30 ], [ %or34, %if.then33 ] %and36 = and i32 %8, 512 %tobool37 = icmp eq i32 %and36, 0 br i1 %tobool37, label %if.end40, label %if.then38 if.then38: ; preds = %if.end35 %or39 = or i32 %8, 4194304 store i32 %or39, i32* %b, align 4 br label %if.end40 if.end40: ; preds = %if.end35, %if.then38 %9 = phi i32 [ %8, %if.end35 ], [ %or39, %if.then38 ] %and41 = and i32 %9, 1024 %tobool42 = icmp eq i32 %and41, 0 br i1 %tobool42, label %if.end45, label %if.then43 if.then43: ; preds = %if.end40 %or44 = or i32 %9, 2097152 store i32 %or44, i32* %b, align 4 br label %if.end45 if.end45: ; preds = %if.end40, %if.then43 %10 = phi i32 [ %9, %if.end40 ], [ %or44, %if.then43 ] %and46 = and i32 %10, 2048 %tobool47 = icmp eq i32 %and46, 0 br i1 %tobool47, label %if.end50, label %if.then48 if.then48: ; preds = %if.end45 %or49 = or i32 %10, 1048576 store i32 %or49, i32* %b, align 4 br label %if.end50 if.end50: ; preds = %if.end45, %if.then48 %11 = phi i32 [ %10, %if.end45 ], [ %or49, %if.then48 ] %and51 = and i32 %11, 4096 %tobool52 = icmp eq i32 %and51, 0 br i1 %tobool52, label %if.end55, label %if.then53 if.then53: ; preds = %if.end50 %or54 = or i32 %11, 524288 store i32 %or54, i32* %b, align 4 br label %if.end55 if.end55: ; preds = %if.end50, %if.then53 %12 = phi i32 [ %11, %if.end50 ], [ %or54, %if.then53 ] %and56 = and i32 %12, 8192 %tobool57 = icmp eq i32 %and56, 0 br i1 %tobool57, label %if.end60, label %if.then58 if.then58: ; preds = %if.end55 %or59 = or i32 %12, 262144 store i32 %or59, i32* %b, align 4 br label %if.end60 if.end60: ; preds = %if.end55, %if.then58 %13 = phi i32 [ %12, %if.end55 ], [ %or59, %if.then58 ] %and61 = and i32 %13, 16384 %tobool62 = icmp eq i32 %and61, 0 br i1 %tobool62, label %if.end65, label %if.then63 if.then63: ; preds = %if.end60 %or64 = or i32 %13, 131072 store i32 %or64, i32* %b, align 4 br label %if.end65 if.end65: ; preds = %if.end60, %if.then63 %14 = phi i32 [ %13, %if.end60 ], [ %or64, %if.then63 ] %and66 = and i32 %14, 32768 %tobool67 = icmp eq i32 %and66, 0 br i1 %tobool67, label %if.end70, label %if.then68 if.then68: ; preds = %if.end65 %or69 = or i32 %14, 65536 store i32 %or69, i32* %b, align 4 br label %if.end70 if.end70: ; preds = %if.end65, %if.then68 %15 = phi i32 [ %14, %if.end65 ], [ %or69, %if.then68 ] %and71 = and i32 %15, 128 %tobool72 = icmp eq i32 %and71, 0 br i1 %tobool72, label %if.end75, label %if.then73 if.then73: ; preds = %if.end70 %or74 = or i32 %15, 16777216 store i32 %or74, i32* %b, align 4 br label %if.end75 if.end75: ; preds = %if.end70, %if.then73 ret i32 0 }