| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -simplifycfg -S | FileCheck %s |
| ; PR2540 |
| ; Outval should end up with a select from 0/2, not all constants. |
| |
| target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32" |
| target triple = "i386-pc-linux-gnu" |
| @g_37 = common global i32 0 ; <i32*> [#uses=1] |
| @.str = internal constant [4 x i8] c"%d\0A\00" ; <[4 x i8]*> [#uses=1] |
| |
| define i32 @main() nounwind { |
| ; CHECK-LABEL: @main( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[L:%.*]] = load i32, i32* @g_37, align 4 |
| ; CHECK-NEXT: [[CMPA:%.*]] = icmp ne i32 [[L]], 0 |
| ; CHECK-NEXT: br i1 [[CMPA]], label %func_1.exit, label %mooseblock |
| ; CHECK: mooseblock: |
| ; CHECK-NEXT: [[CMPB:%.*]] = icmp eq i1 [[CMPA]], false |
| ; CHECK-NEXT: [[BRMERGE:%.*]] = or i1 [[CMPB]], [[CMPA]] |
| ; CHECK-NEXT: [[DOTMUX:%.*]] = select i1 [[CMPB]], i32 0, i32 2 |
| ; CHECK-NEXT: br i1 [[BRMERGE]], label %func_1.exit, label %infloop |
| ; CHECK: func_1.exit: |
| ; CHECK-NEXT: [[OUTVAL:%.*]] = phi i32 [ 1, %entry ], [ [[DOTMUX]], %mooseblock ] |
| ; CHECK-NEXT: [[POUT:%.*]] = tail call i32 (i8*, ...) @printf |
| ; CHECK-NEXT: ret i32 0 |
| ; CHECK: infloop: |
| ; CHECK-NEXT: br label %infloop |
| ; |
| entry: |
| %l = load i32, i32* @g_37, align 4 ; <i32> [#uses=1] |
| %cmpa = icmp ne i32 %l, 0 ; <i1> [#uses=3] |
| br i1 %cmpa, label %func_1.exit, label %mooseblock |
| |
| mooseblock: ; preds = %entry |
| %cmpb = icmp eq i1 %cmpa, false ; <i1> [#uses=2] |
| br i1 %cmpb, label %monkeyblock, label %beeblock |
| |
| monkeyblock: ; preds = %monkeyblock, %mooseblock |
| br i1 %cmpb, label %cowblock, label %monkeyblock |
| |
| beeblock: ; preds = %beeblock, %mooseblock |
| br i1 %cmpa, label %cowblock, label %beeblock |
| |
| cowblock: ; preds = %beeblock, %monkeyblock |
| %cowval = phi i32 [ 2, %beeblock ], [ 0, %monkeyblock ] ; <i32> [#uses=1] |
| br label %func_1.exit |
| |
| func_1.exit: ; preds = %cowblock, %entry |
| %outval = phi i32 [ %cowval, %cowblock ], [ 1, %entry ] ; <i32> [#uses=1] |
| %pout = tail call i32 (i8*, ...) @printf( i8* noalias getelementptr ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i32 %outval ) nounwind ; <i32> [#uses=0] |
| ret i32 0 |
| } |
| |
| declare i32 @printf(i8*, ...) nounwind |
| |
