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| ; 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
|