-
Notifications
You must be signed in to change notification settings - Fork 10.8k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Fixes #75369. This patch explicitly folds `~(~X >>u Y)` into `X >>s Y` to fix assertion failure in #75369.
- Loading branch information
Showing
3 changed files
with
42 additions
and
10 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,36 @@ | ||
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4 | ||
; RUN: opt -passes=instcombine -S < %s | FileCheck %s | ||
|
||
define i32 @main(ptr %a, i8 %a0, i32 %conv, i8 %a1) { | ||
; CHECK-LABEL: define i32 @main( | ||
; CHECK-SAME: ptr [[A:%.*]], i8 [[A0:%.*]], i32 [[CONV:%.*]], i8 [[A1:%.*]]) { | ||
; CHECK-NEXT: [[A3:%.*]] = trunc i32 [[CONV]] to i8 | ||
; CHECK-NEXT: [[OR11:%.*]] = or i8 [[A3]], [[A0]] | ||
; CHECK-NEXT: store i8 [[OR11]], ptr [[A]], align 1 | ||
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[A1]], 0 | ||
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]]) | ||
; CHECK-NEXT: ret i32 [[CONV]] | ||
; | ||
%conv1 = sext i8 %a1 to i32 | ||
%a2 = xor i32 %conv, 1 | ||
%or = or i32 %conv1, %conv | ||
%not = xor i32 %or, -1 | ||
%shr = lshr i32 %not, 1 | ||
%add.neg3 = sub i32 %a2, %shr | ||
%conv24 = trunc i32 %add.neg3 to i8 | ||
store i8 %conv24, ptr %a, align 1 | ||
%sext = shl i32 %conv, 0 | ||
%conv3 = ashr i32 %sext, 0 | ||
%a3 = trunc i32 %conv to i8 | ||
%conv5 = or i8 %a3, 0 | ||
%xor6 = xor i8 %conv5, 0 | ||
%xor816 = xor i8 %a0, 0 | ||
%a4 = xor i8 %xor816, 0 | ||
%or11 = or i8 %xor6, %a4 | ||
store i8 %or11, ptr %a, align 1 | ||
%cmp = icmp slt i8 %a1, 0 | ||
call void @llvm.assume(i1 %cmp) | ||
ret i32 %conv3 | ||
} | ||
|
||
declare void @llvm.assume(i1) |