| ; 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 |
| } |
