forked from OSchip/llvm-project
76 lines
1.9 KiB
LLVM
76 lines
1.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt -correlated-propagation -S < %s | FileCheck %s
|
|
|
|
; Checks that we don't crash on conflicting facts about a value
|
|
; (i.e. unreachable code)
|
|
|
|
; Test that we can handle conflict edge facts
|
|
|
|
define i8 @test(i8 %a) {
|
|
; CHECK-LABEL: @test(
|
|
; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i8 [[A:%.*]], 5
|
|
; CHECK-NEXT: br i1 [[CMP1]], label [[NEXT:%.*]], label [[EXIT:%.*]]
|
|
; CHECK: next:
|
|
; CHECK-NEXT: br i1 false, label [[DEAD:%.*]], label [[EXIT]]
|
|
; CHECK: dead:
|
|
; CHECK-NEXT: ret i8 5
|
|
; CHECK: exit:
|
|
; CHECK-NEXT: ret i8 0
|
|
;
|
|
%cmp1 = icmp eq i8 %a, 5
|
|
br i1 %cmp1, label %next, label %exit
|
|
next:
|
|
%cmp2 = icmp eq i8 %a, 3
|
|
br i1 %cmp2, label %dead, label %exit
|
|
dead:
|
|
; NOTE: undef, or 3 would be equal valid
|
|
ret i8 %a
|
|
exit:
|
|
ret i8 0
|
|
}
|
|
|
|
declare void @llvm.assume(i1)
|
|
|
|
; Test that we can handle conflicting assume vs edge facts
|
|
|
|
define i8 @test2(i8 %a) {
|
|
; CHECK-LABEL: @test2(
|
|
; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i8 [[A:%.*]], 5
|
|
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP1]])
|
|
; CHECK-NEXT: br i1 false, label [[DEAD:%.*]], label [[EXIT:%.*]]
|
|
; CHECK: dead:
|
|
; CHECK-NEXT: ret i8 5
|
|
; CHECK: exit:
|
|
; CHECK-NEXT: ret i8 0
|
|
;
|
|
%cmp1 = icmp eq i8 %a, 5
|
|
call void @llvm.assume(i1 %cmp1)
|
|
%cmp2 = icmp eq i8 %a, 3
|
|
br i1 %cmp2, label %dead, label %exit
|
|
dead:
|
|
ret i8 %a
|
|
exit:
|
|
ret i8 0
|
|
}
|
|
|
|
define i8 @test3(i8 %a) {
|
|
; CHECK-LABEL: @test3(
|
|
; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i8 [[A:%.*]], 5
|
|
; CHECK-NEXT: br i1 [[CMP1]], label [[DEAD:%.*]], label [[EXIT:%.*]]
|
|
; CHECK: dead:
|
|
; CHECK-NEXT: call void @llvm.assume(i1 false)
|
|
; CHECK-NEXT: ret i8 5
|
|
; CHECK: exit:
|
|
; CHECK-NEXT: ret i8 0
|
|
;
|
|
%cmp1 = icmp eq i8 %a, 5
|
|
br i1 %cmp1, label %dead, label %exit
|
|
dead:
|
|
%cmp2 = icmp eq i8 %a, 3
|
|
call void @llvm.assume(i1 %cmp2)
|
|
ret i8 %a
|
|
exit:
|
|
ret i8 0
|
|
}
|
|
|