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[ValueTracking] add tests for known-nonnull-at; NFC 

llvm-svn: 290790
This commit is contained in:
Sanjay Patel 2016-12-31 19:23:26 +00:00
parent 2177f3ce5f
commit 5865d12e9f
1 changed files with 57 additions and 0 deletions
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57
llvm/test/Analysis/ValueTracking/known-nonnull-at.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -instsimplify < %s | FileCheck %s
declare void @bar(i8* %a, i8* nonnull %b)
; 'y' must be nonnull.
define i1 @caller1(i8* %x, i8* %y) {
; CHECK-LABEL: @caller1(
; CHECK-NEXT: call void @bar(i8* %x, i8* %y)
; CHECK-NEXT: [[NULL_CHECK:%.*]] = icmp eq i8* %y, null
; CHECK-NEXT: ret i1 [[NULL_CHECK]]
;
call void @bar(i8* %x, i8* %y)
%null_check = icmp eq i8* %y, null
ret i1 %null_check
}
; Don't know anything about 'y'.
define i1 @caller2(i8* %x, i8* %y) {
; CHECK-LABEL: @caller2(
; CHECK-NEXT: call void @bar(i8* %y, i8* %x)
; CHECK-NEXT: [[NULL_CHECK:%.*]] = icmp eq i8* %y, null
; CHECK-NEXT: ret i1 [[NULL_CHECK]]
;
call void @bar(i8* %y, i8* %x)
%null_check = icmp eq i8* %y, null
ret i1 %null_check
}
; 'y' must be nonnull.
define i1 @caller3(i8* %x, i8* %y) {
; CHECK-LABEL: @caller3(
; CHECK-NEXT: call void @bar(i8* %x, i8* %y)
; CHECK-NEXT: [[NULL_CHECK:%.*]] = icmp ne i8* %y, null
; CHECK-NEXT: ret i1 [[NULL_CHECK]]
;
call void @bar(i8* %x, i8* %y)
%null_check = icmp ne i8* %y, null
ret i1 %null_check
}
; Don't know anything about 'y'.
define i1 @caller4(i8* %x, i8* %y) {
; CHECK-LABEL: @caller4(
; CHECK-NEXT: call void @bar(i8* %y, i8* %x)
; CHECK-NEXT: [[NULL_CHECK:%.*]] = icmp ne i8* %y, null
; CHECK-NEXT: ret i1 [[NULL_CHECK]]
;
call void @bar(i8* %y, i8* %x)
%null_check = icmp ne i8* %y, null
ret i1 %null_check
}