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| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -simplifycfg < %s | FileCheck %s
declare i8 @next_char();
define void @test_no_msan() {
; CHECK-LABEL: @test_no_msan(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK: while.body:
; CHECK-NEXT: br label [[WHILE_BODY_I:%.*]]
; CHECK: while.body.i:
; CHECK-NEXT: [[MAYBE_UNDEF:%.*]] = phi i1 [ undef, [[WHILE_BODY]] ], [ [[NEXT_MAYBE_UNDEF:%.*]], [[WHILE_BODY_I]] ]
; CHECK-NEXT: [[C:%.*]] = call fastcc signext i8 @next_char()
; CHECK-NEXT: [[C_10:%.*]] = icmp eq i8 [[C]], 10
; CHECK-NEXT: [[C_13:%.*]] = icmp eq i8 [[C]], 13
; CHECK-NEXT: [[C_10_OR_13:%.*]] = or i1 [[C_10]], [[C_13]]
; CHECK-NEXT: [[NEXT_MAYBE_UNDEF]] = or i1 [[MAYBE_UNDEF]], [[C_10_OR_13]]
; CHECK-NEXT: [[C_NOT_10_OR_13:%.*]] = xor i1 [[C_10_OR_13]], true
; CHECK-NEXT: br i1 [[C_NOT_10_OR_13]], label [[WHILE_BODY_I]], label [[WHILE_BODY_I_BREAK:%.*]]
; CHECK: while.body.i.break:
; CHECK-NEXT: br i1 [[MAYBE_UNDEF]], label [[WHILE_BODY]], label [[SWITCH_EARLY_TEST:%.*]]
; CHECK: switch.early.test:
; CHECK-NEXT: switch i8 [[C]], label [[RETURN:%.*]] [
; CHECK-NEXT: i8 13, label [[WHILE_BODY]]
; CHECK-NEXT: i8 10, label [[WHILE_BODY]]
; CHECK-NEXT: ]
; CHECK: return:
; CHECK-NEXT: ret void
;
entry:
br label %while.body
while.body:
br label %while.body.i
while.body.i:
%maybe_undef = phi i1 [ undef, %while.body ], [ %next_maybe_undef, %while.body.i ]
%c = call fastcc signext i8 @next_char()
%c_10 = icmp eq i8 %c, 10
%c_13 = icmp eq i8 %c, 13
%c_10_or_13 = or i1 %c_10, %c_13
%next_maybe_undef = or i1 %maybe_undef, %c_10_or_13
%c_not_10_or_13 = xor i1 %c_10_or_13, true
br i1 %c_not_10_or_13, label %while.body.i, label %while.body.i.break
while.body.i.break:
; NEXT_MAYBE_UNDEF is never undef if here
br i1 %next_maybe_undef, label %while.body, label %return
return:
ret void
}
define void @test_msan() sanitize_memory {
; CHECK-LABEL: @test_msan(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK: while.body:
; CHECK-NEXT: br label [[WHILE_BODY_I:%.*]]
; CHECK: while.body.i:
; CHECK-NEXT: [[MAYBE_UNDEF:%.*]] = phi i1 [ undef, [[WHILE_BODY]] ], [ [[NEXT_MAYBE_UNDEF:%.*]], [[WHILE_BODY_I]] ]
; CHECK-NEXT: [[C:%.*]] = call fastcc signext i8 @next_char()
; CHECK-NEXT: [[C_10:%.*]] = icmp eq i8 [[C]], 10
; CHECK-NEXT: [[C_13:%.*]] = icmp eq i8 [[C]], 13
; CHECK-NEXT: [[C_10_OR_13:%.*]] = or i1 [[C_10]], [[C_13]]
; CHECK-NEXT: [[NEXT_MAYBE_UNDEF]] = or i1 [[MAYBE_UNDEF]], [[C_10_OR_13]]
; CHECK-NEXT: [[C_NOT_10_OR_13:%.*]] = xor i1 [[C_10_OR_13]], true
; CHECK-NEXT: br i1 [[C_NOT_10_OR_13]], label [[WHILE_BODY_I]], label [[WHILE_BODY_I_BREAK:%.*]]
; CHECK: while.body.i.break:
; CHECK-NEXT: br i1 [[NEXT_MAYBE_UNDEF]], label [[WHILE_BODY]], label [[RETURN:%.*]]
; CHECK: return:
; CHECK-NEXT: ret void
;
entry:
br label %while.body
while.body:
br label %while.body.i
while.body.i:
%maybe_undef = phi i1 [ undef, %while.body ], [ %next_maybe_undef, %while.body.i ]
%c = call fastcc signext i8 @next_char()
%c_10 = icmp eq i8 %c, 10
%c_13 = icmp eq i8 %c, 13
%c_10_or_13 = or i1 %c_10, %c_13
%next_maybe_undef = or i1 %maybe_undef, %c_10_or_13
%c_not_10_or_13 = xor i1 %c_10_or_13, true
br i1 %c_not_10_or_13, label %while.body.i, label %while.body.i.break
while.body.i.break:
; NEXT_MAYBE_UNDEF is never undef if here
br i1 %next_maybe_undef, label %while.body, label %return
return:
ret void
}
|