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Test for future commit in NewGVN #66313

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62 changes: 62 additions & 0 deletions llvm/test/Transforms/NewGVN/assume_dominating_icmp.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
; RUN: opt -passes=newgvn -S < %s | FileCheck %s

@c = global i32 0, align 4

; Function Attrs: nounwind optsize uwtable
define dso_local i32 @main(i1 %cond, i32 %0, i32 %1) {
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@nikic nikic Sep 18, 2023

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Can drop dso_local. I'd also recommend to avoid the use of unnamed values, i.e. replace i32 %0 with i32 %arg0 etc.

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@kmitropoulou kmitropoulou Sep 18, 2023

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I am sorry I missed this comment. I created a new pr: #66711

; CHECK-LABEL: define dso_local i32 @main(
; CHECK-SAME: i1 [[COND:%.*]], i32 [[TMP0:%.*]], i32 [[TMP1:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND]], label [[IF_THEN:%.*]], label [[IF_END6:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[XOR:%.*]] = xor i32 [[TMP0]], 1
; CHECK-NEXT: [[TOBOOL1_NOT:%.*]] = icmp eq i32 [[TMP1]], 0
; CHECK-NEXT: br i1 [[TOBOOL1_NOT]], label [[IF_END6]], label [[IF_THEN2:%.*]]
; CHECK: if.then2:
; CHECK-NEXT: [[TOBOOL3_NOT:%.*]] = icmp ne i32 [[XOR]], 0
; CHECK-NEXT: tail call void @llvm.assume(i1 [[TOBOOL3_NOT]])
; CHECK-NEXT: br label [[IF_END6]]
; CHECK: if.end6:
; CHECK-NEXT: [[F_0:%.*]] = phi i32 [ undef, [[ENTRY:%.*]] ], [ [[XOR]], [[IF_THEN]] ], [ [[XOR]], [[IF_THEN2]] ]
; CHECK-NEXT: [[NOT:%.*]] = xor i32 [[F_0]], -1
; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr @c, align 4
; CHECK-NEXT: [[OR:%.*]] = or i32 [[TMP2]], [[NOT]]
; CHECK-NEXT: [[TOBOOL7_NOT:%.*]] = icmp eq i32 [[OR]], 0
; CHECK-NEXT: br i1 [[TOBOOL7_NOT]], label [[IF_END10:%.*]], label [[WHILE_COND_PREHEADER:%.*]]
; CHECK: while.cond.preheader:
; CHECK-NEXT: ret i32 1
; CHECK: if.end10:
; CHECK-NEXT: ret i32 0
;
entry:
br i1 %cond, label %if.then, label %if.end6

if.then: ; preds = %entry
%xor = xor i32 %0, 1
%tobool1.not = icmp eq i32 %1, 0
br i1 %tobool1.not, label %if.end6, label %if.then2

if.then2: ; preds = %if.then
%tobool3.not = icmp ne i32 %xor, 0
tail call void @llvm.assume(i1 %tobool3.not)
br label %if.end6

if.end6: ; preds = %if.then2, %if.then, %entry
%f.0 = phi i32 [ undef, %entry ], [ %xor, %if.then ], [ %xor, %if.then2 ]
%not = xor i32 %f.0, -1
%2 = load i32, ptr @c, align 4
%or = or i32 %2, %not
%tobool7.not = icmp eq i32 %or, 0
%tobool9.not = icmp eq i32 %f.0, 0
%or.cond = or i1 %tobool7.not, %tobool9.not
br i1 %or.cond, label %if.end10, label %while.cond.preheader

while.cond.preheader: ; preds = %if.end6
ret i32 1

if.end10: ; preds = %if.end6
ret i32 0
}

declare void @llvm.assume(i1 noundef)