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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 i32 @main(i1 %cond1, i32 %arg0, i32 %arg1) {
; CHECK-LABEL: define i32 @main(
; CHECK-SAME: i1 [[COND1:%.*]], i32 [[ARG0:%.*]], i32 [[ARG1:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND1]], label [[BB1:%.*]], label [[BB3:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[XOR1:%.*]] = xor i32 [[ARG0]], 1
; CHECK-NEXT: [[COND2:%.*]] = icmp eq i32 [[ARG1]], 0
; CHECK-NEXT: br i1 [[COND2]], label [[BB3]], label [[BB2:%.*]]
; CHECK: bb2:
; CHECK-NEXT: [[COND3:%.*]] = icmp ne i32 [[XOR1]], 0
; CHECK-NEXT: tail call void @llvm.assume(i1 [[COND3]])
; CHECK-NEXT: br label [[BB3]]
; CHECK: bb3:
; CHECK-NEXT: [[PHI:%.*]] = phi i32 [ undef, [[ENTRY:%.*]] ], [ [[XOR1]], [[BB1]] ], [ [[XOR1]], [[BB2]] ]
; CHECK-NEXT: [[XOR2:%.*]] = xor i32 [[PHI]], -1
; CHECK-NEXT: [[LD:%.*]] = load i32, ptr @c, align 4
; CHECK-NEXT: [[OR:%.*]] = or i32 [[LD]], [[XOR2]]
; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[OR]], 0
; CHECK-NEXT: [[CMP2:%.*]] = icmp eq i32 [[PHI]], 0
; CHECK-NEXT: [[COND4:%.*]] = or i1 [[CMP1]], [[CMP2]]
; CHECK-NEXT: br i1 [[COND4]], label [[EXIT1:%.*]], label [[EXIT2:%.*]]
; CHECK: exit1:
; CHECK-NEXT: ret i32 0
; CHECK: exit2:
; CHECK-NEXT: ret i32 1
;
entry:
; entry
; / |
; bb1 |
; / | |
; bb2 | |
; \| |
; bb3
; / \
; exit1 exit2
br i1 %cond1, label %bb1, label %bb3
bb1: ; preds = %entry
%xor1 = xor i32 %arg0, 1
%cond2 = icmp eq i32 %arg1, 0
br i1 %cond2, label %bb3, label %bb2
bb2: ; preds = %bb1
%cond3 = icmp ne i32 %xor1, 0
tail call void @llvm.assume(i1 %cond3)
br label %bb3
bb3: ; preds = %bb2, %bb1, %entry
%phi = phi i32 [ undef, %entry ], [ %xor1, %bb1 ], [ %xor1, %bb2 ]
%xor2 = xor i32 %phi, -1
%ld = load i32, ptr @c, align 4
%or = or i32 %ld, %xor2
%cmp1 = icmp eq i32 %or, 0
%cmp2 = icmp eq i32 %phi, 0
%cond4 = or i1 %cmp1, %cmp2
br i1 %cond4, label %exit1, label %exit2
exit1: ; preds = %bb3
ret i32 0
exit2: ; preds = %bb3
ret i32 1
}
declare void @llvm.assume(i1 noundef)
|
